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在化学复杂的合金中观察拓式霍尔效应

Jihao Yu^1,2, Yuying Liu³, Yubin Ke^4,5

¹Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.

Advanced materials (Deerfield Beach, Fla.)

|January 24, 2024

概括

在复杂的Fe-Co-Ni-Mn合金中发现了一种新的拓学霍尔效应 (THE). 这一发现扩大了对超越传统系统的非常规磁性秩序的理解.

科学领域:

凝聚物质物理学凝聚物质物理学
材料科学材料科学材料科学
磁力学磁力学是一种

背景情况:

拓的霍尔效应 (THE) 探测了奇拉旋转纹理和非常规的磁顺序.
以前,THE仅在非中心对称系统或三角格子磁铁中观察到.
这些系统依赖于Dzyaloshinskii-Moriya相互作用或RKKY相互作用,分别.

研究的目的:

在面中心立方 (fcc) Fe-Co-Ni-Mn合金中调查拓霍尔效应的存在和起源.
探索这种复杂合金中磁性挫折和THE之间的关系.
为了区分这个系统中THE的机制与 skyrmion和几何挫败磁铁中的机制.

主要方法:

在不同温度和磁场的Fe-Co-Ni-Mn合金中实验观察THE.
对磁性质的分析,包括对回入旋转玻璃状态的观察.
了解电子和磁结构的第一原则计算.

主要成果:

在fcc Fe-Co-Ni-Mn合金中观察到明显的拓学霍尔效应.
由于随机的原子占用和海森堡交换相互作用,合金表现出强烈的磁性挫折.
在低温下发现了回归自旋玻璃状态,证实了磁丧.

结论:

在Fe-Co-Ni-Mn合金中观察到的THE源于由外部磁场下的磁丧引起的旋转度.
这种机制与控制 THE in skyrmion 系统和几何挫折磁铁的机制不同.
这项研究表明,具有简单结构的复杂合金可以容纳像THE这样的非常规磁现象.

关键词:

化学乱是一种化学乱.化学复杂的合金合金.磁性的挫折感磁性的挫折感旋转性是指旋转性.拓学的霍尔效应

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