Graphene(Gr)with widely acclaimed characteristics,such as exceptionally long spin diffusion length at room temperature,provides an outstanding platform for spintronics.However,its inherent weak spin–orbit coupling(SO...Graphene(Gr)with widely acclaimed characteristics,such as exceptionally long spin diffusion length at room temperature,provides an outstanding platform for spintronics.However,its inherent weak spin–orbit coupling(SOC)has limited its efficiency for generating the spin currents in order to control the magnetization switching process for applications in spintronics memories.Following the theoretical prediction on the enhancement of SOC in Gr by heavy atoms adsorption,here we experimentally observe a sizeable spin–orbit torques(SOTs)in Gr by the decoration of its surface with Pt adatoms in Gr/Pt(t Pt)/Fe Ni trilayers with the optimal damping-like SOT efficiency around 0.55 by 0.6-nm-thick Pt layer adsorption.The value is nearly four times larger than that of the Pt/Fe Ni sample without Gr and nearly twice the value of the Gr/Fe Ni sample without Pt adsorption.The efficiency of the enhanced SOT in Gr by Pt adatoms is also demonstrated by the field-free SOT magnetization switching process with a relatively low critical current density around 5.4 MA/cm^(2)in Gr/Pt/Fe Ni trilayers with the in-plane magnetic anisotropy.These findings pave the way for Gr spintronics applications,offering solutions for future low power consumption memories.展开更多
利用双螺杆挤出机熔融共混的方法制备了不同含量的碳纤维(CF)与尼龙共聚物(PA6T/66)复合材料,通过差示扫描量热仪、热重分析仪、扫描电子显微镜和力学性能测试研究了该复合材料的热性能、力学性能和断面形态结构。结果显示,复合材料的...利用双螺杆挤出机熔融共混的方法制备了不同含量的碳纤维(CF)与尼龙共聚物(PA6T/66)复合材料,通过差示扫描量热仪、热重分析仪、扫描电子显微镜和力学性能测试研究了该复合材料的热性能、力学性能和断面形态结构。结果显示,复合材料的起始分解温度均在400℃以上,熔点都在300℃左右。随着CF含量的增加,复合材料的拉伸强度、弯曲强度和冲击强度都相应增加,当CF质量分数达到40%时,复合材料的拉伸强度、弯曲强度和冲击强度分别达到最大值:226.1 MPa、354.7 MPa、54.1 k J/m2。展开更多
基金supported by the National Key R&D Program of China(Grant No.2021YFB3501304)the National Natural Science Foundation of China(Grant Nos.91963201 and 51671098)+4 种基金the 111 Project(Grant No.B20063)the Open Research Fund of Songshan Lake Materials Laboratory(Grant No.2023SLABFN05)the Program for Changjiang Scholars and Innovative Research Team in University PCSIRT(Grant No.IRT16R35)the Fundamental Research Funds for the Central Universities(Grant No.lzujbky-2021-ct01)the Natural Science Foundation of Gansu Province(Grant No.22JR5RA474)。
文摘Graphene(Gr)with widely acclaimed characteristics,such as exceptionally long spin diffusion length at room temperature,provides an outstanding platform for spintronics.However,its inherent weak spin–orbit coupling(SOC)has limited its efficiency for generating the spin currents in order to control the magnetization switching process for applications in spintronics memories.Following the theoretical prediction on the enhancement of SOC in Gr by heavy atoms adsorption,here we experimentally observe a sizeable spin–orbit torques(SOTs)in Gr by the decoration of its surface with Pt adatoms in Gr/Pt(t Pt)/Fe Ni trilayers with the optimal damping-like SOT efficiency around 0.55 by 0.6-nm-thick Pt layer adsorption.The value is nearly four times larger than that of the Pt/Fe Ni sample without Gr and nearly twice the value of the Gr/Fe Ni sample without Pt adsorption.The efficiency of the enhanced SOT in Gr by Pt adatoms is also demonstrated by the field-free SOT magnetization switching process with a relatively low critical current density around 5.4 MA/cm^(2)in Gr/Pt/Fe Ni trilayers with the in-plane magnetic anisotropy.These findings pave the way for Gr spintronics applications,offering solutions for future low power consumption memories.
文摘利用双螺杆挤出机熔融共混的方法制备了不同含量的碳纤维(CF)与尼龙共聚物(PA6T/66)复合材料,通过差示扫描量热仪、热重分析仪、扫描电子显微镜和力学性能测试研究了该复合材料的热性能、力学性能和断面形态结构。结果显示,复合材料的起始分解温度均在400℃以上,熔点都在300℃左右。随着CF含量的增加,复合材料的拉伸强度、弯曲强度和冲击强度都相应增加,当CF质量分数达到40%时,复合材料的拉伸强度、弯曲强度和冲击强度分别达到最大值:226.1 MPa、354.7 MPa、54.1 k J/m2。
