纳米模式的CrGeTe3的强制性的异常大小依赖性
Avia Noah1,2,3, Nofar Fridman1,2, Yishay Zur1,2
1The Racah Institute of Physics, The Hebrew University, Jerusalem, 9190401, Israel. avia.noah@mail.huji.ac.il.
Nanoscale
|October 2, 2024
概括
更小的磁纳米岛显示出更高的强制性,违背了典型的趋势. 和 telluride (CrGeTe3) 纳米岛的这种异常行为表明,磁性特性受到边缘状态的影响,而不仅仅是体积.
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
- 纳米技术纳米技术
背景情况:
- 磁纳米粒子的强制性通常随着尺寸的增加而减少.
- 热波动可以克服磁性异构性,导致零强制性.
研究的目的:
- 调查和 Telluride (CrGeTe3) 纳米岛的强制性.
- 了解异常大小依赖的强制性及其与磁性异构的关系.
主要方法:
- 使用SQUID-on-tip显微镜. 这是一个很好的方法.
- 检查了各种尺寸和尺寸比的方形CrGeTe3纳米岛.
主要成果:
- 观察到异常的大小依赖的强制性:较小的岛屿表现出更高的强制性.
- 发现的强制性尺度与岛屿宽度和厚度 (1/wd) 相反.
- 在较大的岛屿 (1600海里) 中确定了多域结构,净残留场为零.
结论:
- CrGeTe3纳米岛的磁性异构性与周边成比例,表示磁极状态.
- 边缘状态显著影响CrGeTe3.3的磁性.
- 这些发现提升了对低维系统中磁现象的理解.
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