实验观察一维奇拉尔磁晶体中的平面带
Silvia Tacchi1, Jorge Flores-Farías2, Daniela Petti3
1Istituto Officina dei Materiali del CNR (CNR-IOM), Sede Secondaria di Perugia, c/o Dipartimento di Fisica e Geologia, Università di Perugia, 06123 Perugia, Italy.
Nano letters
|June 21, 2023
概括
这项研究表明,在奇拉性马格尼尼晶体中设计的Dzyaloshinskii-Moriya合如何产生不对称的自旋波传播和平面带. 这些发现为控制磁性材料中的自旋波提供了新的途径.
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
- 这就是Spintronics.
背景情况:
- 旋转波是磁性材料中的集体激发,对于信息处理至关重要.
- 它们的传播可以通过材料特性和外部因素来控制.
- 由于对称性被打破而产生的磁切尔效应,可以对自旋波进行独特的控制.
研究的目的:
- 为了研究一种具有调节的界面Dzyaloshinskii-Moriya合的奇拉性马格尼尼克晶体的带图.
- 通过实验证明这种合对旋波传播不对称性的影响.
- 探索平面自旋波波段的形成和定位.
主要方法:
- 制造一个铁磁薄膜,通过重金属纳米线进行周期性Dzyaloshinskii-Moriya合.
- 旋波的实验激发和表征.
- 带图和旋波定位的理论计算.
主要成果:
- 由于调制的Dzyaloshinskii-Moriya相互作用,在自旋波幅度中观察到强大的不对称性,导致非相互传播.
- 在带图中,在低频段形成平面自旋波波段.
- 在有或没有Dzyaloshinskii-Moriya相互作用的区域内计算自旋波局部化,取决于垂直异构.
结论:
- 该研究证实,调制的界面Dzyaloshinskii-Moriya合有效地诱导非互惠的自旋波传播.
- 平面带的形成和可控制的自旋波定位突出了先进磁装置的潜力.
- 这项工作为设计具有量身定制的自旋波动态的新性马格尼克晶体提供了一条途径.
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