在重建的鲁反铁磁金属中出现的零场异常霍尔效应
Meng Wang1, Katsuhiro Tanaka2, Shiro Sakai3
1RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan. meng.wang@riken.jp.
Nature communications
|December 12, 2023
概括
研究人员在Cr-doped RuO2.0中实现了零场异常霍尔效应 (AHE). 用进行兴奋作用会旋转Néel向量,从而使AHE在对线抗铁磁金属中成为潜在的应用.
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
- 固态物理 固态物理
背景情况:
- 反铁磁金属中的异常霍尔效应 (AHE) 是一个重要的科学兴趣的主题.
- 鲁晶体结构磁铁被探索为对线性-抗铁磁诱导的AHE.
- 在RuO2中,由于[001] Néel向量方向,对称性禁止在零场时使用AHE.
研究的目的:
- 调查在合的鲁材料中实现零场AHE的可能性.
- 了解兴奋剂在操纵磁结构和AHE中的作用.
- 展示材料工程作为一种控制反铁磁体中AHE的策略.
主要方法:
- 合成和表征Cr-dopedRuO2 (Ru0.8Cr0.2O2) 的情况.
- 对磁化和传输特性进行实验测量.
- 密度函数理论 (DFT) 计算来分析磁体结构和电子特性.
主要成果:
- 在Ru0.8Cr0.2O2.2.中实现了零场AHE.
- 化剂诱导了Néel向量的旋转从[001]到 [110] ,同时保持了对线反铁磁.
- 观察到的取决于方向的AHE与 [110] 导向的霍尔向量一致,尽管有消失的净磁矩.
结论:
- 通过兴奋剂的材料工程是一种有效的方法来控制和诱导抗铁磁金属中的AHE.
- 在RuO2中使用Cr兴奋剂为实现零场AHE提供了一条途径.
- 这些发现为使用反铁磁材料的新型自旋电子应用开辟了道路.
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