Structural and magnetic properties of bulk Mn 2 PtSn
Structural and magnetic properties of bulk Mn 2 PtSn
复制标题
块状 Mn 2 PtSn 的结构和磁性能
DOI：
10.1088/1361-648x/aae652
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Lukashev, P V
中科院分区：
文献类型：
--
作者：
Herran, J;Prophet, S;Jin, Y;Valloppilly, S;Kharel, P R;Sellmyer, D J;Lukashev, P V
结构参数和磁序参数之间的相互作用是调节自旋电子学器件应用材料性能的关键机制之一。在这里，我们使用密度泛函计算，研究了 Mn 2 PtSn 中四方畸变和非共线磁序的综合影响。我们证明这种材料具有两个与四方晶格相对应的能量接近的能量最小值。在其中一个相中，Mn 2 PtSn 表现出亚铁磁序，具有几乎完全补偿的总磁矩，而在对应于最低能量的另一相中，出现非共线磁排列，具有非常大的 Mn 局部磁矩倾斜角。非共线排列是通过最近和次近邻 Mn 原子之间交换耦合的相互作用来解释的。结果与最近文献中报道的实验和理论结果进行了比较。
Interplay between structural and magnetic order parameters is one of the key mechanisms of tuning properties of materials intended for device applications in spintronics. Here, using density functional calculations, we study combined effects of tetragonal distortion and non-collinear magnetic order in Mn 2 PtSn. We show that this material has two energetically close energy minimums corresponding to tetragonal lattice. In one of these phases, Mn 2 PtSn exhibits ferrimagnetic order with nearly fully compensated total magnetic moment, while in the other phase that corresponds to the lowest energy, a non-collinear magnetic arrangement emerges, with very large canting angle of the Mn local magnetic moments. The non-collinear alignment is explained through the interplay of exchange couplings between nearest and next nearest neighbor Mn atoms. Results are compared with those reported in recent literature, both experimental and theoretical.