Local anisotropy control of Pt/Co/Ir thin film with perpendicular magnetic anisotropy by surface acoustic waves

被引：10

作者：

Shuai, Jintao ^{[1
]}

Ali, Mannan ^{[1
]}

Lopez-Diaz, Luis ^{[2
]}

Cunningham, John E. ^{[3
]}

Moore, Thomas A. ^{[1
]}

机构：

[1] Univ Leeds, Sch Phys & Astron, Woodhouse Lane, Leeds LS2 9JT, England

[2] Univ Salamanca, Dept Appl Phys, Salamanca, Spain

[3] Univ Leeds, Sch Elect & Elect Engn, Woodhouse Lane, Leeds LS2 9JT, England

来源：

APPLIED PHYSICS LETTERS | 2022年 / 120卷 / 25期

基金：

英国工程与自然科学研究理事会; 欧盟地平线“2020”;

关键词：

DRIVEN; TORQUE;

D O I：

10.1063/5.0097172

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The control of perpendicular magnetic anisotropy (PMA) in thin films by strain has considerable potential for energy-efficient information storage and data processing. Here, we report on the control of PMA in Pt/Co/Ir thin films by the strain produced by standing surface acoustic waves (SAWs). A significant (~21%) coercivity reduction (from 4.80 +/- 0.03 to 3.80 +/- 0.02 mT) can be obtained by applying a standing SAW with a center frequency of 93.35 MHz. Furthermore, the standing SAWs induce a greater-than 11-fold increase in magnetization reversal speed (from 168 +/- 3 to up to 2100 +/- 80 mu m(2)/s) at 3.2 mT for a total applied RF power of 22.5 dBm. During application of SAWs, wide-field Kerr microscopy reveals the formation of domains in stripes with a periodicity of half of the SAW wavelength. Micromagnetic simulations indicate that the anti-nodes of the standing SAW locally lower the anisotropy due to the magneto-elastic coupling effect, decreasing domain nucleation field while promoting magnetization reversal. Our study suggests the possibility of remote and energy-efficient control of magnetization switching using SAWs.

引用

页数：6

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