在铁磁铁中,电压通的90°转换大量垂直磁性异位性
Zhengyu Xiao1,2,3, Ruiwen Xie4, Fernando Maccari4
1TUD-KIT Joint Research Laboratory Nanomaterials, Technische Universität Darmstadt, 64287 Darmstadt, Germany.
ACS nano
|February 4, 2025
概括
研究人员通过插入原子,在Tb-Co薄膜中用电切换了大量垂直磁性异性质 (PMA). 这种电压驱动的操纵重新定位了磁性轻松轴,为可编程自旋电子学铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 这就是Spintronics.
背景情况:
- 由于复杂的结构,无形稀土过渡金属薄膜中的垂直磁性异构性 (PMA) 难以理解.
- PMA的潜在起源是纠在一起的,源于微观结构和原子安排.
研究的目的:
- 研究Tb-Co薄膜中散装PMA的机制.
- 用磁电效应来证明对PMA的电控制.
- 为了阐明这些材料中PMA的原子起源.
主要方法:
- 利用磁电效应,通过低电压应用 (-1.2 V) 诱导PMA的90°切换.
- 采用电压驱动的气插入到间位点来扰乱原子结构.
- 使用视角依赖的X射线磁性圆形二元化 (XMCD) 分析异质性切换.
- 执行ab initio计算以支持实验发现.
主要成果:
- 通过使用电压,实现了Tb-Co薄膜中的散装PMA在90°转换为平面内方向.
- 确定了电压驱动的插入作为原子结构扰动的机制.
- 确定异构性切换是由Tb原子周围的晶场扭曲引起的,重定向Tb轨道时刻.
- 证实了由于Tb轨道时刻的重定向,轻松磁化轴的切换为90°.
结论:
- 在确定散装PMA时,确定了Tb-Co结合配置的原子起源.
- 在Tb-Co薄膜中证明了磁性异构的电可编程性.
- 奠定了电可编程铁磁自旋电子应用的基础,包括域壁运动和人工自旋纹理.
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