反铁磁Gd_(2)Zn_(17)的单晶生长与各向异性表征  

Growth and anisotropy characterization of antiferromagnetic Gd_(2)Zn_(17) single crystals

作　　者：甄志璇 ZHEN Zhi-xuan(School of Physics&Electronic Science,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学物理与电子科学学院,上海200241

出　　处：《磁性材料及器件》2025年第1期8-13,共6页Journal of Magnetic Materials and Devices

摘　　要：通过锌助熔剂法成功生长出Gd_(2)Zn_(17)单晶,采用X射线衍射仪与能量色散X射线能谱仪对其进行了结构与成分表征。进一步系统地对Gd_(2)Zn_(17)单晶样品的磁性与电输运性质进行了测试,磁化率与电阻的温度依赖特性表明反铁磁转变温度T_N=9.3 K。并且,Gd_(2)Zn_(17)单晶表现出了磁各向异性与电阻各向异性:对于磁场平行c轴方向,磁化和磁电阻都在3.9 T附近出现了明显的变磁相变点H_c,意味着该磁场附近可能形成了特殊的磁结构;而对磁场垂直c轴方向则没有观察到类似的现象。各向异性的磁相图揭示了其晶体内部可能具有复杂的自旋纹理,为将来进一步探究其中的磁相互作用以及背后的物理机制提供了线索,为未来相关的稀土化合物的研究与应用奠定了基础。Single crystal Gd_(2)Zn_(17) was successfully grown by the zinc flux method,and its structure and composition were characterized by X-ray diffraction and energy dispersive X-ray spectroscopy.Further systematic testing was conducted on the magnetic and electrical transport properties of Gd_(2)Zn_(17) single crystal samples.The temperature dependent characteristics of magnetic susceptibility and resistance indicate that the antiferromagnetic transition temperature is T_(N)=9.3K.And,Gd_(2)Zn_(17) single crystal exhibits magnetic anisotropy and resistance anisotropy:in the direction parallel to the c-axis of the magnetic field,there is a clear demagnetization phase transition point Hc near 3.9 T for magnetization and magnetoresistance,indicating that a special magnetic structure may have formed near this magnetic field;No similar phenomenon was observed in the direction perpendicular to the c-axis of the magnetic field.The anisotropic magnetic phase diagram reveals that there may be complex spin textures inside the crystal,providing clues for further exploration of magnetic interactions and underlying physical mechanisms,and laying the foundation for future research and application of related rare earth compounds.

关 键 词：Gd_(2)Zn_(17)单晶 变磁相变 各向异性 磁性 电输运 

分 类 号：TM271.6[一般工业技术—材料科学与工程]