Structural and Magnetic Properties of the Breathing Pyrochlore LiInCr4-xFexO8
Structural and Magnetic Properties of the Breathing Pyrochlore LiInCr4-xFexO8
复制标题
呼吸烧绿石 LiInCr4-xFexO8 的结构和磁性
DOI：
10.1002/pssb.201900685
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发表时间：
2020
影响因子：
1.6
通讯作者：
Fang Baolong
中科院分区：
文献类型：
--
作者：
Feng Yuan;Liu Hui;Bian Jian;Xiong Wei;Zhu Shoujin;Zong Bangfeng;Shi Biao;Fang Baolong
在此，报道了呼吸烧绿石化合物LiInCr4−xFexO8(x= 0,0.2,0.4,0.5)的结构和磁性能。拉曼散射实验显示了由离子质量和键强度增加引起的活性模式的硬化行为。发现母体样品的长程反铁磁有序和自旋能隙状态随着 Fe 含量的增加而受到抑制。平均磁交换耦合是强反铁磁性的，并且通过替代而系统地增强。取代样品的体磁化数据显示出弱铁磁相互作用，并且在高 Fe 含量下发生了类自旋玻璃转变。
Herein, the structure and magnetic properties of the breathing pyrochlore compound LiInCr4−xFexO8(x= 0, 0.2, 0.4, 0.5) are reported. Raman scattering experiments show the hardening behavior of the active mode induced by the increased ionic masses and bond strength. The long‐range antiferromagnetic order and spin‐gap state of parent samples are found to be suppressed with the increasing Fe content. The average magnetic exchange couplings are strongly antiferromagnetic and systematically enhanced with substitution. Bulk magnetization data of substituted samples show weak ferromagnetic interaction and occurrence of a spin‐glass‐like transition at high Fe contents.