Two magnetization plateaus in the kagome fluoride Cs2LiTi3F12
Two magnetization plateaus in the kagome fluoride Cs2LiTi3F12
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Kagome 氟化物 Cs2LiTi3F12 中的两个磁化平台
DOI：
10.1103/physrevb.100.174401
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发表时间：
2019
影响因子：
3.7
通讯作者：
Yoshimura Kazuyoshi
中科院分区：
文献类型：
--
作者：
Shirakami Ryu;Ueda Hiroaki;Jeschke Harald O.;Nakano Hiroki;Kobayashi Shintaro;Matsuo Akira;Sakai Toru;Katayama Naoyuki;Sawa Hiroshi;Kindo Koichi;Michioka Chishiro;Yoshimura Kazuyoshi
我们合成了一种带有自旋的Kagome氟化物，并研究了该化合物的磁性。磁化率的温度依赖关系表明，它具有主要的反铁磁相互作用，并且在2K以下没有磁序。在磁化过程中，大约在1/3和0.8per Ti处发现了两个磁化平台。单斜晶系的晶体结构给出了四种不等价的近邻交换作用。我们的密度泛函理论计算表明，其中三个是反铁磁性的，其中一个是弱铁磁的，导致了一个由反铁磁耦合的线性链组成的磁性系统。这解释了观察到的磁序被抑制的现象。数值对角化得到的磁化曲线与实验结果吻合较好。
We synthesized a kagome fluoridewithspins, and studied magnetic properties of the compound. The temperature dependence of the magnetic susceptibility indicates that it has dominant antiferromagnetic interactions and that it has no magnetic order down to 2 K. We found two magnetization plateaus in its magnetization process approximately at 1/3 and 0.8per Ti. The monoclinic crystal structure gives four inequivalent nearest-neighbor exchange interactions. Our density functional theory calculations suggest that three of them are antiferromagnetic and one of them is weakly ferromagnetic, resulting in a magnetic system composed of antiferromagnetically coupled linear chains andchains. This explains the observed suppression of magnetic order. Numerical diagonalization gives a magnetization curve in good agreement with the experimental results.