合成几个层的六角化为磁性道交叉路口应用程序
Satoru Emoto1, Hiroki Kusunose1, Yung-Chang Lin2
1Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan.
ACS applied materials & interfaces
|June 7, 2024
概括
大面积的少层六角化 (hBN) 使用化学蒸汽沉积用于磁性道连接装置. 三层hBN显示了比双层hBN更高的道磁阻比率.
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
- 纳米技术 纳米技术
背景情况:
- 六角化 (hBN) 是一种2D绝缘体,具有用于道壁垒的理想特性.
- 目前用于几层hBN制备的方法,如机械剥皮,限制了可扩展性.
- 原子平坦度,高晶体质量和稳定性使hBN成为电子应用的理想选择.
研究的目的:
- 开发一种可扩展的方法,用于大面积的几层hBN生长.
- 研究合成的hBN作为磁道结 (MTJ) 装置中的道屏障的应用.
- 为了比较双层和三层hBN道屏障的性能.
主要方法:
- 通过化学蒸汽沉积 (CVD) 在Ni-Fe薄膜上产生几层hBN的大面积增长.
- 在1200°C的高温下进行合成.
- 使用已成长的hBN和Ni-Fe作为底部铁磁电极制造MTJ设备.
主要成果:
- 在Ni-Fe催化剂上成功合成了几层hBN板 (2-3层).
- 制造的MTJ设备没有污染或表面氧化问题.
- 与双层hBN相比,三层hBN的道磁阻 (TMR) 比率较高.
- 在大约10K时达到10%的最大TMR比率.
结论:
- 化学蒸汽沉积使铁磁膜上大面积合成少数层的hBN成为可能.
- 通过CVD培养的hBN在MTJ设备中有效作为道屏障.
- 三层hBN为MTJ应用提供了比双层hBN更好的性能,实现了显著的TMR比率.
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