在磁性薄膜异构结构中的调节合,具有磁性相位过渡
Kristen Stojak Repa1,2, Brian J Kirby3, Casey W Miller4
1School of Chemistry and Materials Science, Rochester Institute of Technology, Rochester, NY, 14623, USA. krepa@brockport.edu.
Scientific reports
|June 12, 2023
概括
在Py/Cu三层中,磁性合强烈依赖于温度,随着间隔层冷却到其基里温度以下,磁性合从可以忽略的转变为铁磁性. 这种可调节的合器可以实现自发的磁性配置翻转.
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:
- 基于永久合金 (Py) 和铜 (Cu) 的三层在旋转器件中至关重要.
- 了解这些系统中的磁性合和相位过渡是设备优化关键.
研究的目的:
- 研究Py/Cu/Py/IrMn三层中的温度依赖磁合.
- 在间隔层的相位过渡中,将磁顺序与合强度相关联.
- 探索可调节的磁相互作用产生的潜在功能.
主要方法:
- 研究了基于永久合金的三层材料的磁性特性 (Py$_{0.8}$Cu$_{0.2}$/Py$_{0.4}$Cu$_{0.6}$/Py/IrMn).
- 使用偏振中子反射计测量磁性秩序深度配置文件.
- 分析了温度依赖性和厚度对磁性合的影响.
主要成果:
- 合强烈依赖温度,在Py$_{0.4}$Cu$_{0.6}$间距器的基里温度下,在上方可以忽略不计,铁磁性.
- 在这些极端温度之间观察到可调节的合.
- 识别了与逆厚度依赖的接口效应和增强间隔器库里温度 (7纳米长度尺度) 的磁性近距离效应.
结论:
- 三层系统的磁性合和配置可以通过温度和层厚度进行调整.
- 该系统展示了自发的磁性配置从反平行到平行对齐的自发翻转.
- 这些发现凸显了新型自旋电子设备应用的潜力.
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