Direct evidence of imprinted vortex states in the antiferromagnet of exchange biased microdisks

被引：32

作者：

Salazar-Alvarez, G. ^{[1
,2
]}

Kavich, J. J. ^{[1
]}

Sort, J. ^{[3
,4
]}

Mugarza, A. ^{[1
]}

Stepanow, S. ^{[1
]}

Potenza, A. ^{[5
]}

Marchetto, H. ^{[5
]}

Dhesi, S. S. ^{[5
]}

Baltz, V. ^{[6
]}

Dieny, B. ^{[6
]}

Weber, A. ^{[7
]}

Heyderman, L. J. ^{[7
]}

Nogues, J. ^{[1
,3
]}

Gambardella, P. ^{[1
]}

机构：

[1] CSIC, ICN, Ctr Invest Nanociencia & Nanotecnol, E-08193 Barcelona, Spain

[2] Royal Inst Technol, Dept Mat Sci & Engn, S-10044 Stockholm, Sweden

[3] ICREA, E-08010 Barcelona, Spain

[4] Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain

[5] Diamond Light Source, Didcot OX11 0DE, Oxon, England

[6] CEA, CNRS, URA 2512, SPINTEC, F-38054 Grenoble 9, France

[7] Paul Scherrer Inst, Lab Micro & Nanotechnol, CH-5232 Villigen, Switzerland

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 01期

基金：

芬兰科学院; 欧洲研究理事会;

关键词：

MAGNETIC VORTICES; ANISOTROPY; SPINS;

D O I：

10.1063/1.3168515

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic domain structure of patterned antiferromagnetic/ferromagnetic Ir(20)Mn(80)/Ni(80)Fe(20) bilayer microdisk arrays has been investigated using layer-specific polarized x-ray photoemission electron microscopy and magnetic circular dichroism. Magnetic imaging at the Fe and Mn L-edge resonances provided direct evidence of a vortex state imprinted into the antiferromagnet at the interface. The opposite magnetic contrast between the layers indicated a reversed chirality of the imprinted vortex state, and a quantitative analysis of the magnetic moment from the dichroism spectra showed that uncompensated Mn spins equivalent to about 60% of a monolayer of bulk Ir(20)Mn(80) contributed to the imprinted information at the interface. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3168515]

引用

页数：3

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