期刊文献+
共找到58篇文章
< 1 2 3 >
每页显示 20 50 100
Electronic states of domain walls in commensurate charge density wave ground state and mosaic phase in 1T-TaS_(2)
1
作者 李彦 肖遥 +3 位作者 郑琦 林晓 黄立 高鸿钧 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第7期177-180,共4页
Domain walls(DWs)in the charge-density-wave(CDW)Mott insulator 1T-TaS_(2)have unique localized states,which play an important role in exploring the electronic properties of the material.However,the electronic states i... Domain walls(DWs)in the charge-density-wave(CDW)Mott insulator 1T-TaS_(2)have unique localized states,which play an important role in exploring the electronic properties of the material.However,the electronic states in DWs in 1TTaS_(2)have not been clearly understood,mostly due to the complex structures,phases,and interlayer stacking orders in the DW areas.Here,we explored the electronic states of DWs in the large-area CDW phase and mosaic phase of 1T-TaS_(2)by scanning tunneling spectroscopy.Due to the different densities of DWs,the electronic states of DWs show distinct features in these phases.In the large area CDW phase,both the domain and the DWs(DW1,DW2,DW4)have zero conductance at the Fermi level;while in the mosaic phase,they can be metallic or insulating depending on their environments.In areas with a high density of DWs,some electronic states were observed both on the DWs and within the domains,indicating delocalized states over the whole region.Our work contributes to further understanding of the interplay between CDW and electron correlations in 1T-TaS_(2). 展开更多
关键词 1T-TaS_(2) scanning tunneling spectroscopy domain walls charge density wave
下载PDF
Thick Domain Walls in Lyra Geometry with Bulk Viscosity
2
作者 Anirudh Pradhan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第2期378-384,共7页
In this paper, we evaluate the general solutions for plane-symmetric thick domain walls in Lyra geometry in presence of bulk viscous fluid. Expressions for the energy density and pressure of domain walls are derived i... In this paper, we evaluate the general solutions for plane-symmetric thick domain walls in Lyra geometry in presence of bulk viscous fluid. Expressions for the energy density and pressure of domain walls are derived in both cases of uniform and time varying displacement field β. Some physical consequences of the models are also given. Finally, the geodesic equations and acceleration of the test particle are discussed. 展开更多
关键词 COSMOLOGY plane symmetric domain walls bulk viscous model Lyra geometry
下载PDF
Spin waves and transverse domain walls driven by spin waves: Role of damping
3
作者 Zi-Xiang Zhao Peng-Bin He +1 位作者 Meng-Qiu Cai Zai-Dong Li 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第7期506-515,共10页
Based on the uniform,helical and spiral domain-wall magnetic configurations,the excited spin waves are studied with emphasis on the role of damping.We find that the damping closes the gap of dispersion,and greatly inf... Based on the uniform,helical and spiral domain-wall magnetic configurations,the excited spin waves are studied with emphasis on the role of damping.We find that the damping closes the gap of dispersion,and greatly influences the dispersion in the long-wave region for the spin waves of spiral wall and helical structure.For the uniform configuration,the Dzyaloshinskii-Moriya interaction determines the modification of dispersion by the damping.Furthermore,we investigate the interaction between spin waves and a moving spiral domain wall.In the presence of damping,the amplitude of spin wave can increase after running across the wall for small wave numbers.Driving by the spin waves,the wall propagates towards the spin-wave source with an increasing velocity.Unlike the case without damping,the relation between the wall velocity and the spin-wave frequency depends on the position of wall. 展开更多
关键词 spin waves domain walls helical magnetic structure collective coordinates
下载PDF
Influence of spin–orbit coupling on spin-polarized electronic transport in magnetic semiconductor nanowires with nanosized sharp domain walls
4
作者 Lian Liu Wen-Xiang Chen +1 位作者 Rui-Qiang Wang Liang-Bin Hu 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第4期384-390,共7页
Influence of spin–orbit coupling on spin-polarized electronic transport in magnetic semiconductor nanowires with nanosized sharp domain walls is investigated theoretically.It is shown that the Rashba spin–orbit coup... Influence of spin–orbit coupling on spin-polarized electronic transport in magnetic semiconductor nanowires with nanosized sharp domain walls is investigated theoretically.It is shown that the Rashba spin–orbit coupling can enhance significantly the spin-flip scattering of charge carriers from a nanosized sharp domain wall whose extension is much smaller than the carrier's Fermi wavelength.When there are more than one domain wall presented in a magnetic semiconductor nanowire,not only the spin-flip scattering of charge carriers from the domain walls but the quantum interference of charge carriers in the intermediate domain regions between neighboring domain walls may play important roles on spin-polarized electronic transport,and in such cases the influences of the Rashba spin–orbit coupling will depend sensitively both on the domain walls' width and the domain walls' separation. 展开更多
关键词 magnetic semiconductor nanowires domain wall spin-orbit coupling spin-polarized electronic transport
下载PDF
Fabrication of Conductive Domain Walls in x-cut Congruent Thin-film Lithium Niobate Using an Electrical-field Poling Technique(Invited)
5
作者 Su Yawen Chen Haiwei +6 位作者 Zhao Mengwei Niu Yunfei Li Chen Zhang Yong Yang Shaoguang Zhu Shining Hu Xiaopeng 《激光与光电子学进展》 CSCD 北大核心 2024年第11期50-56,共7页
Conductive ferroelectric domain walls have attracted increasing research interest in the field of nanoelectronics,and the fabrication technique for such domain walls is vital.In this study,we investigated in detail th... Conductive ferroelectric domain walls have attracted increasing research interest in the field of nanoelectronics,and the fabrication technique for such domain walls is vital.In this study,we investigated in detail the fabrication of conductive domain walls in x-cut congruent thin-film lithium niobate(TFLN)using an electrical-field poling technique.The ferroelectric domain structures can be controlled through the applied electrical field and applied pulse numbers,and the domain inversion process is related to the conduction characteristics of the domain walls.The domain structures in TFLN are revealed using confocal second-harmonic microscopy and piezoresponse force microscopy.The results provide further directions for the development and application of conductive domain walls in TFLN. 展开更多
关键词 thin-film lithium niobate electric field poling head-to-head/tail-to-tail domain conduction characteristics of domain wall
原文传递
Strain-induced fast domain wall motion in hybrid piezoelectric-magnetostrictive structures with Rashba and nonlinear dissipative effects
6
作者 Sumit Maity Sarabindu Dolui Sharad Dwivedi 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2024年第9期83-97,共15页
The prime objective of this work is to analyze the motion of magnetic domain walls(DWs)in a thin layer of magnetostrictive material that is perfectly attached to the upper surface of a thick piezoelectric actuator.In ... The prime objective of this work is to analyze the motion of magnetic domain walls(DWs)in a thin layer of magnetostrictive material that is perfectly attached to the upper surface of a thick piezoelectric actuator.In our analysis,we consider a transversely isotropic hexagonal subclass of magnetostrictive materials that demonstrate structural inversion asymmetry.To this aim,we utilize the one-dimensional extended Landau-Lifshitz-Gilbert equations,which describe the magnetization dynamics under the influence of various factors such as magnetic fields,spin-polarized electric currents,magnetoelastic effects,magnetocrystalline anisotropy,Rashba fields,and nonlinear dry-friction dissipation.By employing the standard traveling wave ansatz,we derive an analytical expression of the most relevant dynamic features:velocity,mobility,threshold,breakdown,and propagation direction of the DWs in both steady and precessional dynamic regimes.Our analytical investigation provides insights into how effectively the considered parameters can control the DW motion.Finally,numerical illustrations of the obtained analytical results show a qualitative agreement with the recent observations. 展开更多
关键词 domain wall Magnetoelastic field Extended Landau-Lifshitz-Gilbert equation Dry-friction dissipation Rashba effect
原文传递
Consistency between domain wall oscillation modes and spin wave modes in nanostrips
7
作者 董新伟 吴振江 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第6期511-516,共6页
Investigations on domain wall(DW) and spin wave(SW) modes in a series of nanostrips with different widths and thicknesses have been carried out using micromagnetic simulation. The simulation results show that the freq... Investigations on domain wall(DW) and spin wave(SW) modes in a series of nanostrips with different widths and thicknesses have been carried out using micromagnetic simulation. The simulation results show that the frequencies of SW modes and the corresponding DW modes are consistent with each other if they have the same node number along the width direction. This consistency is more pronounced in wide and thin nanostrips, favoring the DW motion driven by SWs.Further analysis of the moving behavior of a DW driven by SWs is also carried out. The average DW speed can reach a larger value of ~ 140 m/s under two different SW sources. We argue that this study is very meaningful for the potential application of DW motion driven by SWs. 展开更多
关键词 micromagnetic simulation domain wall spin wave
下载PDF
Controlled manipulation of conductive ferroelectric domain walls and nanoscale domains in BiFeO_(3) thin films 被引量:2
8
作者 Dongfeng Zheng Guo Tian +9 位作者 Yadong Wang Wenda Yang Luyong Zhang Zoufei Chen Zhen Fan Deyang Chen Zhipeng Hou Xingsen Gao Qiliang Li Jun-Ming Liu 《Journal of Materiomics》 SCIE 2022年第2期274-280,共7页
Recently,there is a surge of research interest in configurable ferroelectric conductive domain walls which have been considered as possible fundamental building blocks for future electronic devices.In this work,by usi... Recently,there is a surge of research interest in configurable ferroelectric conductive domain walls which have been considered as possible fundamental building blocks for future electronic devices.In this work,by using piezoresponse force microscopy and conductive atomic force microscopy,we demonstrated the controlled manipulation of various conductive domain walls in epitaxial BiFeO_(3) thin films,e.g.neutral domain walls(NDW)and charged domain walls(CDWs).More interestingly,a specific type of nanoscale domains was also identified,which are surrounded by highly conductive circular CWDs.Similar nano-scale domains can also be controlled created and erasured by applying local field via conductive probe,which allow nondestructive current readout of different domain states with a large on/off resistance ratio up to 102.The results indicate the potential to design and develop high-density non-volatile ferroelectric memories by utilizing these programable conductive nanoscale domain walls. 展开更多
关键词 BiFeO_(3)thin film Conductive domain wall Nanoscale domain High density memory
原文传递
Formation of topological domain walls and quantum transport properties of zero-line modes in commensurate bilayer graphene systems
9
作者 Junjie Zeng Rui Xue +2 位作者 Tao Hou Yulei Han Zhenhua Qiao 《Frontiers of physics》 SCIE CSCD 2022年第6期95-105,共11页
We study theoretically the construction of topological conducting domain walls with a finite width between AB/BA stacking regions via finite element method in bilayer graphene systems with tunable commensurate twistin... We study theoretically the construction of topological conducting domain walls with a finite width between AB/BA stacking regions via finite element method in bilayer graphene systems with tunable commensurate twisting angles.We find that the smaller is the twisting angle,the more significant the lattice reconstruction would be,so that sharper domain boundaries declare their existence.We subsequently study the quantum transport properties of topological zero-line modes which can exist because of the said domain boundaries via Green’s function method and Landauer–Büttiker formalism,and find that in scattering regions with triintersectional conducting channels,topological zero-line modes both exhibit robust behavior exemplified as the saturated total transmission Gtot≈2e_(2)/h and obey a specific pseudospin-conserving current partition law among the branch transport channels.The former property is unaffected by Aharonov–Bohm effect due to a weak perpendicular magnetic field,but the latter is not.Results from our genuine bilayer hexagonal system suggest a twisting angle aroundθ≈0.1°for those properties to be expected,consistent with the existing experimental reports. 展开更多
关键词 twistronics lattice reconstruction topological domain wall zero-line mode quantum transport
原文传递
Multi-segmented nanowires for vortex magnetic domain wall racetrack memory
10
作者 M Al Bahri M Al Hinaai T Al Harthy 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第12期582-588,共7页
A vortex domain wall's(VW) magnetic racetrack memory's high performance depends on VW structural stability,high speed, low power consumption and high storage density. In this study, these critical parameters w... A vortex domain wall's(VW) magnetic racetrack memory's high performance depends on VW structural stability,high speed, low power consumption and high storage density. In this study, these critical parameters were investigated in magnetic multi-segmented nanowires using micromagnetic simulation. Thus, an offset magnetic nanowire with a junction at the center was proposed for this purpose. This junction was implemented by shifting one portion of the magnetic nanowire horizontally in the x-direction(l) and vertically(d) in the y-direction. The VW structure became stable by manipulating magnetic properties, such as magnetic saturation(M_(4)) and magnetic anisotropy energy(K_(u)). In this case, increasing the values of M_(4) ≥ 800 kA/m keeps the VW structure stable during its dynamics and pinning and depinning in offset nanowires,which contributes to maintenance of the storage memory's lifetime for a longer period. It was also found that the VW moved with a speed of 500 m/s, which is desirable for VW racetrack memory devices. Moreover, it was revealed that the VW velocity could be controlled by adjusting the offset area dimensions(l and d), which helps to drive the VW by using low current densities and reducing the thermal-magnetic spin fluctuations. Further, the depinning current density of the VW(J_(d)) over the offset area increases as d increases and l decreases. In addition, magnetic properties, such as the M_(4) and K_(u),can affect the depinning process of the VW through the offset area. For high storage density, magnetic nanowires(multisegmented) with four junctions were designed. In total, six states were found with high VW stability, which means three bits per cell. Herein, we observed that the depinning current density(J_(d)) for moving the VW from one state to another was highly influenced by the offset area geometry(l and d) and the material's magnetic properties, such as the M_(4) and K_(u). 展开更多
关键词 micromagnetic simulation vortex domain wall racetrack memory multi-segmented magnetic nanowire spin transfer torque
下载PDF
Ferroelectric domain wall memory
11
作者 李一鸣 孙杰 江安全 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第12期14-20,共7页
Ferroelectric domain walls appear as sub-nanometer-thick topological interfaces separating two adjacent domains in different orientations,and can be repetitively created,erased,and moved during programming into differ... Ferroelectric domain walls appear as sub-nanometer-thick topological interfaces separating two adjacent domains in different orientations,and can be repetitively created,erased,and moved during programming into different logic states for the nonvolatile memory under an applied electric field,providing a new paradigm for highly miniaturized low-energy electronic devices.Under some specific conditions,the charged domain walls are conducting,differing from their insulating bulk domains.In the past decade,the emergence of atomic-layer scaling solid-state electronic devices is such demonstration,resulting in the rapid rise of domain wall nano-electronics.This review aims to the latest development of ferroelectric domain-wall memories with the presence of the challenges and opportunities and the roadmap to their future commercialization. 展开更多
关键词 domain wall MEMORY FERROELECTRIC
下载PDF
Dependence of domain wall structures on repetition n in[Pt(0.5 nm)/Co(0.4 nm)]_n/NiO(1.1 nm)/[Co(0.4 nm)/Pt(0.5 nm)]_n multilayers
12
作者 Xiao-xia Li Gang Han 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2010年第2期229-233,共5页
The magnetic force microscopy and a sample vibrating magnetometer have been used to investigate the domain structure in two antiferromagnetically coupled Co/Pt multilayers.In the antiferromagnetic coupled[Pt(0.5 nm)... The magnetic force microscopy and a sample vibrating magnetometer have been used to investigate the domain structure in two antiferromagnetically coupled Co/Pt multilayers.In the antiferromagnetic coupled[Pt(0.5 nm)/Co(0.4 nm)]n/NiO(1.1 nm)/[Co(0.4 nm)/Pt(0.5 nm)]n multilayers with perpendicular anisotropy,the antiferromagnetic interlayer coupling strength increases linearly with the repetition number n in Co/Pt multilayers.In demagnetized states,relatively shifted domain walls in the two Co/Pt multilayers are observed,with net ferromagnetic stripes formed between them for the repetition number n less than 5,and the stripe width decreases with the increase of n.The occurrence of these features can be attributed to the competition between the interlayer coupling and magnetostatic energies. 展开更多
关键词 perpendicular anisotropy ANTIFERROMAGNETS interlayer coupling domain walls magnetostatic energy
下载PDF
Domain wall dynamics in magnetic nanotubes driven by an external magnetic field 被引量:3
13
作者 Zai-Dong Li Yue-Chuan Hu +1 位作者 Peng-Bin He Lin-Lin Sun 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第7期527-530,共4页
We use the Landau-Lifshitz-Gilbert equation to investigate field-driven domain wall propagation in magnetic nan- otubes. We find that the distortion is maximum as the time becomes infinite and the exact rigid-body sol... We use the Landau-Lifshitz-Gilbert equation to investigate field-driven domain wall propagation in magnetic nan- otubes. We find that the distortion is maximum as the time becomes infinite and the exact rigid-body solutions are obtained analytically. We also find that the velocity increases with increasing the ratio of inner radius and outer radius. That is to say, we can accelerate domain wall motion not only by increasing the magnetic field, but also by reducing the thickness of the nanotubes. 展开更多
关键词 domain wall magnetic nanotubes magnetic field
下载PDF
Cu-doping induced ferromagnetic insulating behavior and domain wall pinning effects in LaMnO_3 被引量:1
14
作者 GAO Tian CAO Shixun +2 位作者 LIU Yongsheng ZHANG Yufeng ZHANG Jincang 《Rare Metals》 SCIE EI CAS CSCD 2011年第4期359-367,共9页
A systematic study on the structural, magnetic, and electrical transport properties was performed for the LaMnlxCUxO3 system. A single phase of orthorhornbic perovskite structure was formed for x = 0.05-0.40. A striki... A systematic study on the structural, magnetic, and electrical transport properties was performed for the LaMnlxCUxO3 system. A single phase of orthorhornbic perovskite structure was formed for x = 0.05-0.40. A striking paramagnetic-ferromagnetic transition and a considerable magnetoresistance effect were observed at the ferromagnetic ordering temperature Tc, but no insulator-metal transition induced by Cu-doping was observed. Below Tc, a visible unexpected drop was observed in the ac susceptibility and zero-field-cooled dc magnetization for the dilute doped samples with x≤0.10, which was proven to be associated with domain wall pinning effects by milling the bulk material into single domain particles. It is validated that there is no exchange interaction between Cu and Mn, and double exchange interactions between Mn^3+ and Mn^4+ are induced by Cu-doping in the anti-ferromagnetic LaMnO3 matrix, whereas the severe distortion and disorder caused by occupied-dopant prohibits charge carriers from hopping. 展开更多
关键词 MANGANITES lanthanum compounds COPPER DOPING FERROMAGNETISM domain wall pinning
下载PDF
Generation of domain-wall solitons in an anomalous dispersion fiber ring laser 被引量:1
15
作者 Wen-Yan Zhang Kun Yang +4 位作者 Li-Jie Geng Nan-Nan Liu Yun-Qi Hao Tian-Hao Xian Li Zhan 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第11期102-106,共5页
We report experimental observations performed using a net anomalous dispersion Er-doped fiber ring laser without polarization-selective elements,highlighting the domain-wall solitary pulses generated under the incoher... We report experimental observations performed using a net anomalous dispersion Er-doped fiber ring laser without polarization-selective elements,highlighting the domain-wall solitary pulses generated under the incoherent polarization coupling.By adjusting the pump power and the polarization state appropriately,bright and dark solitons can stably co-exist in the cavity,both centered at 1562.16 nm with a 3-dB spectral width of -0.15 nm and a repetition rate of 3.83 MHz.Moreover,the 0.8 mm long thulium-doped fiber(TDF)facilitated the mode-locking and self-starting of the laser.This is the first demonstration of a laser being used to generate bright and dark solitons synchronously while using TDF as the saturable absorber(SA).Except possessing the all-fiber structure,the laser exhibits good stability,which may have a significant influence on improvement of the pulse-laser design,and may broaden practical applications in optical sensing,optical communication,and soliton multiplexed systems. 展开更多
关键词 optical solitons fiber lasers domain wall soliton pulse laser
下载PDF
Observation of Magnetic Domain Structures of Magnetic Thin Films by the Lorentz Electron Microscopy 被引量:1
16
作者 A. Okada M Chimura +2 位作者 K Hamada M Arita I. Ishida(Advanced Materials Science Laboratory, Division of Electronics and information Engineering, Graduate School of Engineering, Hokkaido University,Sapporo 060-8628, Japan) 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 1999年第2期119-124,共6页
The microstructure change in thin NiFe/Cu/NiFe films during the magnetization process was observed by the Lorentz electronmicroscopy. TWo types of films were prepared: (1) one NiFe layer with anisotropy and the other ... The microstructure change in thin NiFe/Cu/NiFe films during the magnetization process was observed by the Lorentz electronmicroscopy. TWo types of films were prepared: (1) one NiFe layer with anisotropy and the other layer without, and (2) both NiFe layershave anisotropy normal each other. The domain wall migration and magnetization rotation processes in each of NiFe layers could be observed separately. The presence of magnetic anisotropy in the magnetic layer effectively controls the behavior of magnetic domains. Theinteraction between the two NiFe layers of the film could be observed not so strong in the present experiment. 展开更多
关键词 magnetic domain domain wall Lorentz microscopy multi-layers thin films hysteresis loop permalloy film
下载PDF
Magneto-elastic waves in the orthoferrite plates induced by solitary domain wall
17
作者 KUZ'MENKO A P ZHUKOV E A +1 位作者 DOBROMYSLOV M B KAMINSKII A V 《Rare Metals》 SCIE EI CAS CSCD 2007年第S1期5-9,共5页
Dynamics of domain walls(DWs) was studied in transparent thin orthoferrite samples with weak ferromagnetic ordering at subsonic and supersonic speeds.Direct measurements were made of flexural vibration amplitude in th... Dynamics of domain walls(DWs) was studied in transparent thin orthoferrite samples with weak ferromagnetic ordering at subsonic and supersonic speeds.Direct measurements were made of flexural vibration amplitude in the samples studied,which were induced by a solitary DW with periodic actions of a driving magnetic field.The values of the amplitude reached 7 nm at a resonance.The formation of magnetoelastic solitons was observed and their dynamics was studied at a resonance between an elastic and a spin subsystems.Solitons lag behind the DW at the moment when the DW surpasses the sound barrier and are ahead of it at the subsonic motion. 展开更多
关键词 orthoferrite domain wall magnetoelastic solitons quasiparticle excitations elastic deformation
下载PDF
Investigation of Domain Wall Velocity to External Fields for High-Quality Waveguide-Type Periodically Poled LiNbO_(3) Fabrication
18
作者 Soo Woo Kwon Woo Seok Yang +4 位作者 H M Lee Woo Kyung Kim Hang Yong Lee Dae Ho Yoon Yo Seung Song 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第z1期131-135,共5页
The Ti-doped waveguide-type periodically poled LiNbO_(3)(PPLN)were fabricated and the dependence of domain wall velocity on an external field applied for domain inversion was investigated.The whole polarization revers... The Ti-doped waveguide-type periodically poled LiNbO_(3)(PPLN)were fabricated and the dependence of domain wall velocity on an external field applied for domain inversion was investigated.The whole polarization reversal process was computer-controlled to regulate domain wall expansion at a feedback time shorter than 5μs.The coercive voltage and several values of excess voltage were applied on 500μm-thick wafers serially connected to a 1-MOhm external resistor which had an effect of the poling current reduction,i.e.the deceleration of domain wall expansion.The domain wall velocity is sensitive to the poling voltage,precisely speaking,to the excess voltage.The domain wall velocities were 28.70,16.02 and 5.75μm·s^(-1)under poling field of 23.5,22.0 and 21.0 kV·mm^(-1),respectively.Moreover,average duty cycle of PPLN is about 49.93%. 展开更多
关键词 periodically poled lithium niobate coerciv field duty cycle domain wall velocity quasi phase matching
下载PDF
Generation of high-energy dual-wavelength domain wall pulse with low repetition rate in an HNLF-based fiber ring laser
19
作者 罗智超 林振彬 +5 位作者 李金玉 朱鹏飞 宁秋奕 邢晓波 罗爱平 徐文成 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第6期217-220,共4页
The generation of high-energy dual-wavelength domain wall pulse with a low repetition rate is demonstrated in a highly nonlinear fiber (HNLF)-based fiber ring laser. By introducing the intracavity birefringence-indu... The generation of high-energy dual-wavelength domain wall pulse with a low repetition rate is demonstrated in a highly nonlinear fiber (HNLF)-based fiber ring laser. By introducing the intracavity birefringence-induced spectral filtering effect, the dual-wavelength lasing operation can be achieved. In order to enhance the cross coupling effect between the two lasing beams for domain wall pulse formation, a 215-m HNLF is incorporated into the laser cavity. Experimentally, it is found that the dual-wavelength domain wall pulse with a repetition rate of 77.67 kHz could be efficiently obtained through simply rotating the polarization controller (PC). At a maximum pump power of 322 mW, the 655-nJ single pulse energy in cavity is obtained. The proposed configuration provides a simpler and more efficient way to generate high energy pulse with a low repetition rate. 展开更多
关键词 fiber lasers high-energy pulse domain wall low repetition rate
下载PDF
Asymmetric dynamic behaviors of magnetic domain wall in trapezoid-cross-section nanostrip
20
作者 Xiao-Ping Ma Hong-Guang Piao +3 位作者 Lei Yang Dong-Hyun Kim Chun-Yeol You Liqing Pan 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第9期518-522,共5页
Field-driven magnetic domain wall propagation in ferromagnetic nanostrips with trapezoidal cross section has been systematically investigated by means of micromagnetic simulation. Asymmetric dynamic behaviors of domai... Field-driven magnetic domain wall propagation in ferromagnetic nanostrips with trapezoidal cross section has been systematically investigated by means of micromagnetic simulation. Asymmetric dynamic behaviors of domain wall, depending on the propagation direction, were observed under an external magnetic field. When the domain walls propagate in the opposite direction along the long axis of the nanostrip, the Walker breakdown fields as well as the average velocities are different. The asymmetric landscape of demagnetization energies, which arises from the trapezoidal geometry, is the main origin of the asymmetric propagation behavior. Furthermore, a trapezoid-cross-section nanostrip will become a nanotube if it is rolled artificially along its long axis, and thus a two-dimensional transverse domain wall will become a three-dimensional one. Interestingly, it is found that the asymmetric behaviors observed in two-dimensional nanostrips with trapezoidal cross section are similar with some dynamic properties occurring in three-dimensional nanotubes. 展开更多
关键词 ferromagnetic nanowire magnetic domain wall geometric effect asymmetric Walker breakdown
下载PDF
上一页 1 2 3 下一页 到第
使用帮助 返回顶部