发表机构
Tokyo Metropolitan University（东京都立大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过磁化与比热测量，系统揭示了SmTr2Ge2中磁各向异性随Tr元素从易ab面到易c轴的转变，并发现CEF基态能级交叉，为理解配体环境与4f电子态关联提供实验依据。
AI 中文摘要
我们通过磁化强度和比热测量，研究了具有ThCr2Si2型结构的SmTr2Ge2（Tr=Co-Cu和Ag）中的晶场（CEF）态。磁各向异性随Tr系统演化，从Tr=Co和Ni的易ab面转变为Tr=Cu和Ag的易c轴。对低温磁化率和磁熵的联合分析表明，在Ni和Cu之间发生了CEF基态的能级交叉，同时第一激发CEF能量也系统演化。磁性质的演化与局部结构参数的变化相关，为讨论Sm离子周围的配体环境如何与4f电子态相关联提供了实验基础。
英文摘要
We investigated the crystal-electric-field (CEF) states in SmTr2Ge2 (Tr= Co-Cu and Ag) with the ThCr2Si2-type structure by magnetization and specific heat measurements. The magnetic anisotropy evolves systematically with Tr, changing from an easy ab plane for Tr = Co and Ni to an easy c axis for Tr = Cu and Ag. Combined analyses of the low-temperature susceptibility and magnetic entropy indicate a level crossing of the CEF ground state between Ni and Cu, together with a systematic evolution of the first excited CEF energy. The evolution of the magnetic properties correlates with changes in local structural parameters, providing an experimental basis for discussing how the ligand environment around the Sm ion is related to the 4f electronic state.
Comments10 pages
Journal refJ. Phys. Soc. Jpn. 95 (2026) 104711
