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Magnetic triangular bubble lattices in bismuth-doped yttrium iron garnet
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作者 蔺涛 王承祥 +7 位作者 邱志勇 陈超 邢弢 孙璐 梁建辉 吴义政 时钟 雷娜 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第2期34-39,共6页
Magnetic bubbles have again become a subject of significant attention following the experimental observation of topologically nontrivial magnetic skyrmions. In recent work, tailoring the shape of the bubbles is consid... Magnetic bubbles have again become a subject of significant attention following the experimental observation of topologically nontrivial magnetic skyrmions. In recent work, tailoring the shape of the bubbles is considered a key factor for their dynamics in spintronic devices. In addition to the reported circular, elliptical, and square bubbles, here we observe triangular bubble domains in bismuth-doped yttrium iron garnet(Bi-YIG) using Kerr microscopy. The bubble domains evolve from discrete circular to latticed triangular and hexagonal shapes. Further, the orientation of the triangular bubbles in the hexagonal lattices can be flipped by decreasing the magnetic field. The sixfold in-plane magnetic anisotropy of Bi-YIG(111) crystal, which is presumably the mechanism underlying the triangular shape of the bubbles, is measured as1179 erg/cm~3. The study of the morphologies of topologically trivial bubbles in YIG offers insight into nontrivial spin textures, which is appealing for future spintronic applications. 展开更多
关键词 magnetic bubble yttrium iron garnet Kerr microscopy SPINTRONICS
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Valence Control of Ce Ions in Cerium-substituted Yttrium Iron Garnet
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作者 宋锋兵 李强 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2005年第1期6-8,共3页
Cerium-substituted yttrium iron garnet(Ce x Y 3-xFe 5O 12, Ce∶YIG) was prepared via coprecipitation. The structu re, morphology, valence state and constituent of Ce ions were investigated respe ctively. X-ra... Cerium-substituted yttrium iron garnet(Ce x Y 3-xFe 5O 12, Ce∶YIG) was prepared via coprecipitation. The structu re, morphology, valence state and constituent of Ce ions were investigated respe ctively. X-ray powder diffraction(XRD) analysis shows that Ce∶YIG was of singl e cubic YIG phase. The result of X-ray photoelectron spectroscopy(XPS) indicate s the Ce ions in Ce∶YIG were in the state of trivalence. Scanning electron micr oscope(SEM) demonstrates the conglobation of Ce∶YIG particles about 0.2μm scal e.The magnetic properties were studied by a vibrating sample magnetometer(VSM) a nd the result exhibits that substitution of Ce 3+ changes the magnetic para meters of YIG. The effects of doping content of Ce ions and synthesis temperatu re on valence control were discussed in detail. 展开更多
关键词 cerium-substituted yttrium iron garnet coprecipi tation valence control Ce 3+
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Highly Sensitive Fiber-Optic Faraday-Effect Magnetic Field Sensor Based on Yttrium Iron Garnet
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作者 Wenbo FEI (Department of Physics, Northeastern Universitys Shenyang 110006, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2000年第2期205-206,共2页
The principle and performance of a fiber-optic Faraday-effect magnetic-field sensor based on an yttrium iron garnet (YIG) and two flux concentrations are described. A single polarization-maintaining optical fiber link... The principle and performance of a fiber-optic Faraday-effect magnetic-field sensor based on an yttrium iron garnet (YIG) and two flux concentrations are described. A single polarization-maintaining optical fiber links the sensor head to the source and detection system, in which the technique of phase shift cancellation is used to cancel the phase shift that accumulatein the optical fiber. Flux concentrators were exploited to enhance the YIG crystal magneto-optic sensitivity .The sensor system exhibited a noise-equivalent field of 8 pT/√Hz and a 3 dB bandwidth of ~10 MHz. 展开更多
关键词 YIG Highly Sensitive Fiber-Optic Faraday-Effect Magnetic Field Sensor Based on yttrium iron garnet
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Electromagneto-Optical Scanning of the Magnetic Domains Local Areas of Bismuth-Substituted Yttrium Iron Garnets
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作者 Vadim E. Koronovskyy Alehander A. Kalenichenko 《Journal of Modern Physics》 2011年第8期908-912,共5页
Magneto-electric properties of the magnetic domains local areas of bismuth-substituted yttrium iron garnet films are investigated. The electromagneto-optical (EMO) scanning method was used in our experiments when prob... Magneto-electric properties of the magnetic domains local areas of bismuth-substituted yttrium iron garnet films are investigated. The electromagneto-optical (EMO) scanning method was used in our experiments when probing by laser beam various sites of separate magnetic domains of the film. Registered in our experiments the nonlinear and linear components of EMO effect does not remain to constants at optical scanning of various points of the magnetic domain. I.e. the local EMOE picture from the separate sites of the domain must be more informative than an averaged one in the multidomain case. 展开更多
关键词 Magneto-Electric Electromagneto-Optical DOMAIN yttrium iron garnet
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Growth,optical dispersion and magnetic behavior of Dy^(3+) doped yttrium iron garnet crystals
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作者 Yating Fang Hui Shen +6 位作者 Yudie Ma Shijie Liao Shuang Xia Tian Tian Ding Zhou Yunfeng Ma Jiayue Xu 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第6期1110-1117,I0004,共9页
Y_(3)Fe_(5)O_(12)(YIG)crystals are highly desirable for the fabrication of mid-infrared isolators with the rapid growth of optical communications,although it is rather challenging to grow large size and high-quality s... Y_(3)Fe_(5)O_(12)(YIG)crystals are highly desirable for the fabrication of mid-infrared isolators with the rapid growth of optical communications,although it is rather challenging to grow large size and high-quality single crystals.Dy^(3+)doping is expected to improve the optical and magneto-optical prope rties.However,high quality Dy:YIG crystals and the adjustment of Dy^(3+)on the structure and optical behavior of YIG crystal remain unclear,impeding its practical applications.Herein,a series of Y_(3-x)Dy_(x)Fe_(5)O_(12)(x=0,0.5,1.0,1.5,3)solid solution crystals was grown by the flux-Bridgman method and single crystals up to 25 mm were obtained.With the introduction of Dy^(3+),lattice parameters are gradually enlarged from 1.2379 nm(YIG)to 1.2420 nm(DyIG).Typical Dy^(3+)absorption peaks are observed around 1070,1265 and 1670 nm.The refractive index decreases from 2.37(500 nm)to 2.10(2500 nm)for YIG crystal,and it reduces from 2.47(500 nm)to 2.16(2500 nm)for DyIG crystal.The optical bandgaps remain almost unchanged for Dy:YIG crystals.The optical dispersion of the refractive indices was finely fitted by the Wemple and DiDomenico(WDD)and the Sellmeier models,respectively.With the increase of Dy^(3+)content,the saturation magnetization(Ms)decreases significantly from 23.62 emu/g(YIG)to 5.33 emu/g(DyIG).Small coercive field is persisted for this system,endowing small external magnetic field.These results provide valuable references for the manipulation of rare earths on the properties of magnetooptical crystals,which is beneficial to the design of high-performance garnet crystals for the application of optical switching and non-reciprocal related devices. 展开更多
关键词 Magneto-optical crystal yttrium iron garnet Dy^(3+)doping Crystal growth Optical dispersion Rare earths
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Effect of La^(3+)substitution on structural,microstructure,magnetic properties,and microwave absorbing ability of yttrium iron garnet 被引量:3
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作者 Sari Hasnah Dewi Ade Mulyawan +2 位作者 Yosef Sarwanto Didin S.Winatapura Wisnu Ari Adi 《Journal of Rare Earths》 SCIE EI CAS CSCD 2023年第4期578-587,共10页
Synthesis and characterization of lanthanum-doped yttrium iro n garnet(YIG)in the compositional se ries of Y_(3-x)La_(x)Fe_(5)O_(12)(x=0.0,0.1,0.3,and 0.5)were carried out.All compositions were made by using solid sta... Synthesis and characterization of lanthanum-doped yttrium iro n garnet(YIG)in the compositional se ries of Y_(3-x)La_(x)Fe_(5)O_(12)(x=0.0,0.1,0.3,and 0.5)were carried out.All compositions were made by using solid state reaction method with ball-milling technique.The phase formation,surface morphology,magnetic properties,and microwave absorbing ability of all compositions were characterized by using an X-ray diffractometer,a scanning electron microscope,a vibrating sample magnetometer,and a Vector network analyzer.The results reveal that all compositions are crystallized into Y_(3)Fe_(5)O_(12)phase(space group la-3d(230).It was observed that the lattice constant is increased from 1.2373 to 1.2421 nm with the increase of lanthanum substitution level from x=0.0-0.5.The crystallite size of Y_(3-x)La_(x)Fe_(5)O_(12)series calculated by Scherrer method is found to decrease from 78 nm in x=0.0-63 nm in x=0.5.The particle size distribution from the surface morphology image analysis is shifted to lower-range number with the increase of lanthanum substitution level from x=0.0 to 0.5.The substitution process also affects the lattice distortion in La-doped samples and changes the bond angles and bond lengths of the YIG structure.As the results,a linear correlation between the Fe'-O-Fe bond angle with magnetic properties parameters of saturation magnetization(M_(s))and remanence magnetization(M_(r))was studied.Due to the lanthanum substitution process,all La^(3+)-doped samples possess higher M_(s)and M_(r)values compared to the original composition.The results of Vector network analyzer show that the improvement of the M_(s)and M_(r)plays an important role in enhancing the microwave absorbing ability of the materials.The minimum RL changes from-8.22 dB(~85.22%microwave absorption)in x=0.0 to-14.21 dB(~96.25%microwave absorption)in x=0.5.The enhancement is mainly ascribed to the natural magnetic resonance loss and dipoIe-polarization loss due to the substitution process.The decreasing particle size also enhances the microwave absorbing ability of the La-doped samples via multiple-reflections mechanism. 展开更多
关键词 yttrium iron garnet Rare-earth doping Solid-state reaction Magnetic properties Structural properties Microwave absorbing ability
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Influence of Forming Pressure on Properties of Yttrium Iron Garnet Ferrite
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作者 陈志刚 李海华 《Journal of Shanghai Jiaotong university(Science)》 EI 2023年第2期207-212,共6页
The Ca-Sn co-substituted yttrium iron garnet(YIG)ferrite materials were prepared by the traditional oxide solid-state reaction method,and the influence of forming pressure on the density,morphology and magnetic proper... The Ca-Sn co-substituted yttrium iron garnet(YIG)ferrite materials were prepared by the traditional oxide solid-state reaction method,and the influence of forming pressure on the density,morphology and magnetic properties of YIG ferrite was systematically studied.The results show that the density of YIG ferrite green body increases with the increase of the forming pressure,while the density of its sintered body shows a trend of first increasing and then decreasing.At the same time,the ferromagnetic resonance(FMR)linewidth of YIG sample first decreases and then increases.Meanwhile,the effects of forming pressure on the saturation magnetization,remanence and coercivity of the sample can be ignored.This study proves that the density and FMR linewidth of YIG materials can be controlled by regulating the forming pressure and the best performance is obtained for the sample prepared under a forming pressure of 5 MPa. 展开更多
关键词 yttrium iron garnet(YIG)ferrite oxide solid-state reaction method forming pressure DENSITY ferromagnetic resonance(FMR)linewidth
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放电等离子烧结Bi、Ce掺杂钇铁石榴石陶瓷的微观结构与磁性能
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作者 叶登建 代波 《材料导报》 EI CAS CSCD 北大核心 2024年第4期33-37,共5页
钇铁石榴石(Y_(3)Fe_(5)O_(12),YIG)是一种立方晶体结构的软磁铁氧体材料。YIG具有法拉第效应、低的铁磁共振线宽,在微波磁光领域具有广阔的应用前景。采用球磨法,通过预烧成功制备Y_(2.6-x)Bi_(0.4)Ce_(x)Fe_(5)O_(12)(x=0.1,0.2)粉末... 钇铁石榴石(Y_(3)Fe_(5)O_(12),YIG)是一种立方晶体结构的软磁铁氧体材料。YIG具有法拉第效应、低的铁磁共振线宽,在微波磁光领域具有广阔的应用前景。采用球磨法,通过预烧成功制备Y_(2.6-x)Bi_(0.4)Ce_(x)Fe_(5)O_(12)(x=0.1,0.2)粉末,再利用放电等离子烧结(SPS)将其在较低温度下制备成陶瓷。采用X射线衍射仪对陶瓷表面和内层进行了物相分析,采用扫描电子显微镜对粉体和陶瓷形貌进行观察,采用振动样品磁强计对样品进行了静态磁性能测试。实验结果表明,由于Bi元素的掺入,预烧温度降低到1050℃。利用放电等离子烧结方法,在1050℃、60 MPa、保温4 min条件下制备出孔洞少、表观密度为5.3585 g/cm^(3)和5.4469 g/cm^(3)的Bi,Ce-YIG陶瓷,实现了Bi,Ce-YIG陶瓷的低温快速烧结。Ce的掺入提高了Y_(2.6-x)Bi_(0.4)Ce_(x)Fe_(5)O_(12)(x=0.1,0.2)粉末陶瓷的饱和磁化强度(分别为23.01 emu/g、25.96 emu/g),有利于磁光器件的小型化。Bi,Ce-YIG陶瓷的铁磁共振线宽最低为140.5 Oe,有利于器件在微波应用中的低损耗。 展开更多
关键词 钇铁石榴石 陶瓷 放电等离子烧结 低温快速烧结 静态磁性能
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基于增益腔的腔磁力混合系统中的光放大和快慢光传播
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作者 丛龙江 刘洪雨 《延边大学学报(自然科学版)》 CAS 2024年第1期55-62,共8页
为了在腔磁力系统中实现可控的磁子诱导透明、磁力诱导透明、光放大以及快慢光传播,建立了一个腔磁力混合系统模型.该模型由含有1个钇铁石榴石(YIG)球的增益腔组成.该模型利用强驱动来驱动YIG球,利用弱探测场探测微波腔.研究表明,通过... 为了在腔磁力系统中实现可控的磁子诱导透明、磁力诱导透明、光放大以及快慢光传播,建立了一个腔磁力混合系统模型.该模型由含有1个钇铁石榴石(YIG)球的增益腔组成.该模型利用强驱动来驱动YIG球,利用弱探测场探测微波腔.研究表明,通过选取最优增益和调节腔-磁耦合强度、磁-力耦合强度可以实现可控的磁子诱导透明、磁力诱导透明、光放大以及快慢光传播.该研究结果可为量子信息操纵、量子信息存储和灵敏光开关的研究提供参考. 展开更多
关键词 腔磁力混合系统 增益腔 钇铁石榴石 磁子诱导透明 磁力诱导透明 光放大 快慢光传播
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Magnetic Properties of Y<sub>3-2x</sub>Ca<sub>2x</sub>Fe<sub>5-x</sub>V<sub>x</sub>O<sub>12</sub>Garnets
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作者 Imaddin A. Al-Omari Ralph Skomski David J. Sellmyer 《Advances in Materials Physics and Chemistry》 2012年第3期116-120,共5页
A comprehensive study of the magnetic properties of Y3-2xCa2xFe5-xVxO12 (0 ≤ x ≤ 1) has been performed. The garnet ferrites samples were prepared by the ceramic technique, and X-ray diffraction analysis indicates th... A comprehensive study of the magnetic properties of Y3-2xCa2xFe5-xVxO12 (0 ≤ x ≤ 1) has been performed. The garnet ferrites samples were prepared by the ceramic technique, and X-ray diffraction analysis indicates the formation of single cubic phase. Vibrating sample magnetometry (VSM) and a superconducting quantum-interference device (SQUID) were used to measure the magnetic properties, especially the magnetization and thermo-magnetic behavior. The magnetization curves exhibit the typical characteristics of ferrimagnetic materials at both 4.2 K and at room temperature. The samples have a low coercivities (between 20 and 40 Oe) and saturation magnetizations as high as 36 emu/g at 4.2 K. The saturation magnetization decreases with V and Ca contents, reaching about 8 emu/g at 4.2 K (x = 1). For all samples, the saturation magnetization decreases with increasing temperature, whereas the Curie temperature increases for small values of x, from 557 K for x = 0 to a maximum of 590 K for x = 0.2. For larger values of x, it decreases and reaches 525 K for x = 1.0. The basic experimental trends reflect the occupancy of the tetrahedral 24d sites by vanadium in combination with the predominant intersublattice exchange constant Jad, although the nonzero magnetization at x = 1.0 indicates that about 10% of the substituted V atoms goes onto the octahedral 16a sites. 展开更多
关键词 yttrium iron garnetS CURIE Temperature Saturation Magnetization MAGNETIC Moment
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Bismuth doping enhanced tunability of strain-controlled magnetic anisotropy in epitaxial Y_(3)Fe_(5)O_(12)(111) films
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作者 贾云鹏 梁正国 +7 位作者 潘昊霖 王庆 吕崎鸣 严轶非 金锋 侯达之 王凌飞 吴文彬 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第2期27-33,共7页
Y_(3)Fe_(5)O_(12)(YIG) and Bi Y_(3)Fe_(5)O_(12)(Bi:YIG) films were epitaxially grown on a series of(111)-oriented garnet substrates using pulsed laser deposition. Structural and ferromagnetic resonance characterizatio... Y_(3)Fe_(5)O_(12)(YIG) and Bi Y_(3)Fe_(5)O_(12)(Bi:YIG) films were epitaxially grown on a series of(111)-oriented garnet substrates using pulsed laser deposition. Structural and ferromagnetic resonance characterizations demonstrated the high epitaxial quality, extremely low magnetic loss and coherent strain state in these films. Using these epitaxial films as model systems, we systematically investigated the evolution of magnetic anisotropy(MA) with epitaxial strain and chemical doping. For both the YIG and Bi:YIG films, the compressive strain tends to align the magnetic moment in the film plane while the tensile strain can compete with the demagnetization effect and stabilize perpendicular MA. We found that the strain-induced lattice elongation/compression along the out-of-plane [111] axis is the key parameter that determines the MA. More importantly, the strain-induced tunability of MA can be enhanced significantly by Bi doping;meanwhile, the ultralow damping feature persists. We clarified that the cooperation between strain and chemical doping could realize an effective control of MA in garnet-type ferrites, which is essential for spintronic applications. 展开更多
关键词 yttrium iron garnet strain engineering DOPING magnetic anisotropy
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顶部籽晶法生长大尺寸、高品质钇铁石榴石晶体 被引量:1
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作者 杨晓明 蓝江河 +6 位作者 魏占涛 苏榕冰 李阳 王祖建 刘颖 何超 龙西法 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2023年第3期322-328,共7页
钇铁石榴石(Y_(3)Fe_(5)O_(12),YIG)晶体具有优异的磁学和磁光性质,在微波和磁光器件中有着广泛的应用。目前商用的磁光材料是采用液相外延技术在Gd_(3)Ga_(5)O_(12)(GGG)衬底上沉积的YIG单晶薄膜。本研究以无铅B_(2)O_(3)-BaF_(2)为复... 钇铁石榴石(Y_(3)Fe_(5)O_(12),YIG)晶体具有优异的磁学和磁光性质,在微波和磁光器件中有着广泛的应用。目前商用的磁光材料是采用液相外延技术在Gd_(3)Ga_(5)O_(12)(GGG)衬底上沉积的YIG单晶薄膜。本研究以无铅B_(2)O_(3)-BaF_(2)为复合助熔剂,采用顶部籽晶法技术(TSSG)生长YIG单晶材料,YIG晶体尺寸和重量分别可达43 mm×46 mm×11 mm和60 g。该晶体具有较窄的铁磁共振线宽(0.679 Oe)、高透明度(75%)和法拉第旋转角(200(°)·cm^(-1)@1310 nm,160(°)·cm^(-1)@1550 nm)等优异的综合性能,是微波和磁光器件的良好候选材料。更为重要的是,这种生长技术非常适合大尺寸YIG单晶或稀土掺杂YIG单晶,结合定向籽晶生长和提升工艺,可以显著降低生产成本。 展开更多
关键词 钇铁石榴石 单晶 顶部籽晶法 铁磁共振线宽 磁光效应
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溶液旋涂法制备Bi_(x)Y_(3-x)Fe_(5)O_(12)薄膜的自旋输运特性
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作者 田颖异 王拴虎 +2 位作者 罗殿柄 魏向洋 金克新 《物理学报》 SCIE EI CAS CSCD 北大核心 2023年第1期246-253,共8页
钇铁石榴石(yttrium iron garnet,YIG)的自旋输运特性一直是自旋电子学的研究重点之一.Bi作为YIG最常见的掺杂元素,其薄膜Bi_(x)Y_(3-x)Fe_(5)O_(12)的磁光特性已经被广泛研究.但Bi^(3+)取代Y^(3+)对YIG自旋输运的影响规律还没有被系统... 钇铁石榴石(yttrium iron garnet,YIG)的自旋输运特性一直是自旋电子学的研究重点之一.Bi作为YIG最常见的掺杂元素,其薄膜Bi_(x)Y_(3-x)Fe_(5)O_(12)的磁光特性已经被广泛研究.但Bi^(3+)取代Y^(3+)对YIG自旋输运的影响规律还没有被系统地研究过.本文利用溶液旋涂法制备了不同掺杂比的Bi_(x)Y_(3-x)Fe_(5)O_(12)薄膜,并研究Bi掺杂对YIG薄膜形貌结构和自旋输运性能的影响.结果表明Bi掺杂没有改变YIG的晶体结构,掺杂比上升令薄膜的吸收强度增大,带隙减小.XPS表明了Bi^(3+)和Bi^(2+)的存在.Bi掺杂在自旋输运上的调控体现在Bi_(x)Y_(3-x)Fe_(5)O_(12)薄膜的磁振子扩散长度相比纯YIG薄膜有所减小.同时研究发现Pt/Bi_(x)Y_(3-x)Fe_(5)O_(12)薄膜中依然可以检测到明显的自旋霍尔磁电阻,并在x=0.3时振幅最大. 展开更多
关键词 钇铁石榴石 Bi掺杂 自旋输运 溶液旋涂法
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Yttrium-iron garnet and yttrium orthoferrite nanocrystals:Hydrothermal synthesis, magnetic property and phase transformation study 被引量:2
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作者 Mohammadreza Mansournia Mahsa Orae 《Journal of Rare Earths》 SCIE EI CAS CSCD 2018年第12期1292-1298,共7页
In this work,we present a new and fast method to obtain the single phase YFeO(YIG,cubic) and YFeO(YIP, orthorhombic) nanocrystals based on hydrothermal technique. The influence of initial Y/Fe mole ratio and calcinati... In this work,we present a new and fast method to obtain the single phase YFeO(YIG,cubic) and YFeO(YIP, orthorhombic) nanocrystals based on hydrothermal technique. The influence of initial Y/Fe mole ratio and calcination temperature on the nature, purity, phase structure, and morphology of the product was investigated by X-ray diffraction(XRD), Fourier-transform infrared(FT-IR) spectroscopy,energy-dispersive(EDX) X-ray spectroscopy, and field emission scanning electron microscopy(FESEM).The results show that the transformation of the as-synthesized YIG from amorphous to orthorhombic and finally to cubic phase occurs with the increase of annealing temperature. On this basis, the pure cubic phase YIG can be obtained by calcination(at 1100℃) of the precursor which is prepared using the hydrothermal treatment of mole ratio of Y:Fe = 1:1.5 exposure to an ammonia atmosphere. Also, the initial Y/Fe mole ratio of 1:1 and calcination temperature of 1000 ℃ are the optimal conditions to form single-phase nanocrystalline YIP. Further, vibrating sample magnetometry(VSM) measurements illustrate the average magnetic saturation, coercivity and remanence of 2.73 and 15.00 emu/g, 42.74 and40.02 Oe, and 1.65 and 4.30 emu/g for YIP and YIG nanocrystals, revealing their soft ferromagnetic character. 展开更多
关键词 yttrium-iron garnet yttrium orthoferrite Ammonia atmosphere Nanoparticles Magnetic materials Phase transformation
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Sn^(4+)-Cu^(2+)共掺杂对YIG陶瓷结构和磁性能的影响
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作者 周孝媛 吴燕辉 郑辉 《磁性材料及器件》 CAS 2023年第6期56-60,共5页
采用固相反应法制备了Sn^(^(4+))-Cu^(2+)共掺杂的钇铁石榴石铁氧体Y_(3)Fe_(5-2x)Cu_(x)Sn_(x)O_(12)(x=0,0.05,0.10,0.15)陶瓷。利用X射线衍射仪、拉曼光谱仪、扫描电子显微镜、振动样品磁强计等仪器探究了Sn^(^(4+))-Cu^(2+)离子掺... 采用固相反应法制备了Sn^(^(4+))-Cu^(2+)共掺杂的钇铁石榴石铁氧体Y_(3)Fe_(5-2x)Cu_(x)Sn_(x)O_(12)(x=0,0.05,0.10,0.15)陶瓷。利用X射线衍射仪、拉曼光谱仪、扫描电子显微镜、振动样品磁强计等仪器探究了Sn^(^(4+))-Cu^(2+)离子掺杂浓度对于钇铁石榴石微观形貌、晶体结构、饱和磁化强度以及铁磁共振线宽等方面的综合影响。结果表明,Sn^(^(4+))-Cu^(2+)离子有效进入八面体a位,促进晶粒的生长并获得致密的显微结构;提升激活能,降低氧空位浓度;当掺杂量为x=0.10时,YIG陶瓷的饱和磁化强度具有最大值29.29 emu/g,铁磁共振线宽具有最低值29Oe,优异的电磁特性使其可望在微波器件获得应用。 展开更多
关键词 钇铁石榴石 掺杂 饱和磁化强度 铁磁共振线宽
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非厄米混合系统中快慢光的传播性质
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作者 金靖雯 刘洪雨 《延边大学学报(自然科学版)》 CAS 2023年第3期218-222,共5页
为了研究非厄米混合系统中的快慢光传播性质,提出了一个非厄米磁量子电动力学(QED)混合模型.该模型由2个微波腔和1个钇铁石榴石组成.模型采用强泵浦场驱动磁子,采用弱探测场探测微波腔.研究表明:通过调节腔与磁子之间的相互作用强度和... 为了研究非厄米混合系统中的快慢光传播性质,提出了一个非厄米磁量子电动力学(QED)混合模型.该模型由2个微波腔和1个钇铁石榴石组成.模型采用强泵浦场驱动磁子,采用弱探测场探测微波腔.研究表明:通过调节腔与磁子之间的相互作用强度和微波腔与磁子的耗散比,可以增加磁子诱导放大效应和提高快慢光的传播速度.该研究结果可为量子光学操纵、量子信息存储以及灵敏光开关的研究提供参考. 展开更多
关键词 非厄米混合系统 光放大 钇铁石榴石 微波腔 快慢光
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耗散耦合腔磁系统中极化子的量子特性
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作者 李欣悦 欧孝飞 +2 位作者 董婷婷 佟雨潞 朱爱东 《延边大学学报(自然科学版)》 CAS 2023年第1期43-47,共5页
利用非厄米腔磁学系统研究了相干耦合和耗散耦合对极化子量子性质的影响,并采用主方程数值模拟的方法研究了哈密顿本征能谱的特点.结果表明:在耗散耦合的作用下,本征能谱显示出不同于相干耦合的现象,即实部表现出能级吸引,虚部发生能级... 利用非厄米腔磁学系统研究了相干耦合和耗散耦合对极化子量子性质的影响,并采用主方程数值模拟的方法研究了哈密顿本征能谱的特点.结果表明:在耗散耦合的作用下,本征能谱显示出不同于相干耦合的现象,即实部表现出能级吸引,虚部发生能级排斥.当系统中同时存在相干耦合和耗散耦合时,相干耦合对极化子的演化起主导作用,而耗散耦合仍会影响本征能谱的分布,并且不同相位下的本征能谱分布呈周期性变化.该研究结果可为腔磁学系统的量子信息处理提供理论参考. 展开更多
关键词 相干耦合 耗散耦合 腔磁极化子 钇铁石榴石
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溶胶-凝胶法合成钇铁石榴石(YIG)的凝胶化及热处理研究 被引量:5
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作者 汪敏强 姚熹 +2 位作者 朱翔鹰 孔凡滔 张良莹 《硅酸盐学报》 EI CAS CSCD 北大核心 2002年第3期325-328,共4页
采用溶胶 -凝胶法制备了YIG纳米晶粉体材料 ,分析了合成条件 (pH值、浓度、反应温度和反应时间 )以及热处理等影响材料合成的主要参数 ,利用DTA ,TGA ,XRD ,TEM等手段对材料的制备过程和产物进行了分析 ,探讨材料制备最适宜的工艺条件 ... 采用溶胶 -凝胶法制备了YIG纳米晶粉体材料 ,分析了合成条件 (pH值、浓度、反应温度和反应时间 )以及热处理等影响材料合成的主要参数 ,利用DTA ,TGA ,XRD ,TEM等手段对材料的制备过程和产物进行了分析 ,探讨材料制备最适宜的工艺条件 ,着重研究了热处理工艺对YIG的晶相和颗粒尺度等物理特性的影响 .实验结果表明 ,YIG相的形成是一个放热温度始于 5 0 0℃ ,峰位于 75 9℃的缓缓的放热过程 ,且样品平均晶粒尺寸随热处理呈规律性变化 ,因此可以通过采用溶胶 展开更多
关键词 凝胶化 钇铁石榴石 纳米晶颗粒 溶胶-凝胶 热处理 磁性材料
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YIG石榴石磁光薄膜材料的最新进展 被引量:7
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作者 王巍 兰中文 +1 位作者 姬洪 王豪才 《电子元件与材料》 CAS CSCD 北大核心 2002年第6期23-25,28,共4页
介绍了YIG磁光薄膜材料的研究发展趋势以及薄膜材料的制备方法,指出薄膜制备方法对薄膜的性能有很大的影响。且Ce∶YIG磁光薄膜的研究代表了此类薄膜的研究方向。
关键词 磁光薄膜 磁光器件 YIG石榴石 法拉第效应
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Ce∶YIG粉体的制备及性能研究 被引量:3
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作者 王巍 兰中文 +2 位作者 姬洪 梁魁 王豪才 《电子元件与材料》 CAS CSCD 北大核心 2002年第5期3-5,共3页
本实验采用共沉淀法制备Ce∶YIG粉体。通过对反应体系的pH值的研究,确定了反应的最佳pH值范围为8~9,得到了颗粒分布均匀的粉体。经电子探针微区分析,粉体的组分与实验设计的配方相吻合。粉体在不同的温度条件下进行烧结实验,经XRD分析... 本实验采用共沉淀法制备Ce∶YIG粉体。通过对反应体系的pH值的研究,确定了反应的最佳pH值范围为8~9,得到了颗粒分布均匀的粉体。经电子探针微区分析,粉体的组分与实验设计的配方相吻合。粉体在不同的温度条件下进行烧结实验,经XRD分析证实,YIG的成相温度在650℃附近。可以认为,用共沉淀法制备的Ce∶YIG粉体化学活性好,烧结温度低。 展开更多
关键词 磁性材料 共沉淀法 粉体制备 Ce:YIG石榴石 铁氧体陶瓷 湿化学法
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