在伊特铁片中增强垂直磁性异构的一种策略
Ying Meng1,2, Peng Chen1,2, Wenqing He1,2
1Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|January 17, 2024
概括
伊铁石榴石 (YIG) 薄膜中缺氧会增强垂直磁性异构性 (PMA),从而使先进的磁性材料具有更厚的薄膜. 这一突破为未来的信息存储和处理技术提供了更大的灵活性.
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:
- 磁力电子为未来的信息技术提供了一个有前途的微电子替代品.
- 具有垂直磁性异构性 (PMA) 的伊特铁石榴石 (YIG) 薄膜对于磁器件至关重要.
- 在厚厚的YIG薄膜中实现强大的PMA与最小的格子不匹配是一个重大挑战.
研究的目的:
- 开发一种新的策略,以在YIG电影中增强PMA.
- 为了减少PMA所需的应变,并提高PMA YIG薄膜的厚度限制.
- 为了调查PMA增强背后的物理机制,由于缺氧.
主要方法:
- 制造具有受控氧气缺乏的YIG薄膜.
- 使用传输电子显微镜 (TEM) 和磁性测量进行表征.
- 理论建模以了解PMA增强的起源.
主要成果:
- 在60纳米厚的YIG薄膜中,在0.4%的低格子不匹配 (η) 中,获得了强大的PMA.
- 已经证明,缺氧减少了和磁化,增加了磁阻,增强了PMA.
- 对于PMA YIG薄膜,获得了低的吉尔伯特阻尼值 (约为10−4).
结论:
- 轻微缺氧是一种有效的策略,可以在YIG膜中增强PMA.
- 这种方法增加了基于YIG的磁器件实际应用的灵活性.
- 提供了宝贵的见解,用于理论上的理解和实验增强的PMA在石榴石膜.
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