Chirality switching of an antiferromagnetic spiral wall and its effect on magnetic anisotropy

被引：5

作者：

Li, Q. ^{[1
]}

Yang, M. ^{[1
]}

N'Diaye, A. T. ^{[2
]}

Klewe, C. ^{[2
]}

Shafer, P. ^{[2
]}

Gao, N. ^{[1
]}

Wang, T. Y. ^{[1
]}

Arenholz, E. ^{[3
]}

Zhang, Xixiang ^{[4
]}

Hwang, C. ^{[5
]}

Li, J. ^{[6
]}

Qiu, Z. Q. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[3] Cornell Univ, Cornell High Energy Synchrotron Source, Ithaca, NY 14853 USA

[4] King Abdullah Univ Sci & Technol, Phys Sci & Engn Div PSE, Thuwal 239556900, Saudi Arabia

[5] Korea Res Inst Stand & Sci, Yuseong 305340, Daejeon, South Korea

[6] Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW MATERIALS | 2019年 / 3卷 / 11期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

EXCHANGE; DEPENDENCE; TRANSITION;

D O I：

10.1103/PhysRevMaterials.3.114415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An antiferromagnetic NiO spiral wall in Fe/NiO/Co0.5Ni0.5O/vicinal Ag(001) was created by rotating Fe magnetization and investigated using x-ray magnetic linear dichroism (XMLD). Different from the Mauri's 180 degrees spiral wall, we find that the NiO spiral wall always switches its chirality at similar to 90. rotation of the Fe magnetization, and unwinds the spiral wall back to a single domain with a further rotation of the Fe magnetization from 90 degrees to 180 degrees. The effect of this chirality switching on themagnetic anisotropy was studied using rotationalmagneto-optic Kerr effect (ROTMOKE) on Py/NiO/Co0.5Ni0.5O/vicinal Ag(001). We find that the original Mauri's model has to be corrected by an energy folding due to the chirality switching, which consequently converts the exchange bias from the Mauri's 180 degrees spiral wall into a uniaxial anisotropy and a negative fourfold anisotropy.

引用

页数：6

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