Spatial Fluctuations of Loose Spin Coupling in CuMn/Co Multilayers

被引：16

作者：

Saerbeck, T. ^{[1
,2
]}

Loh, N. ^{[1
,2
]}

Lott, D. ^{[3
]}

Toperverg, B. P. ^{[4
,5
]}

Mulders, A. M. ^{[2
,6
,7
]}

Fraile Rodriguez, A. ^{[8
,9
,10
]}

Freeland, J. W. ^{[11
]}

Ali, M. ^{[12
]}

Hickey, B. J. ^{[12
]}

Stampfl, A. P. J. ^{[2
,13
]}

Klose, F. ^{[2
]}

Stamps, R. L. ^{[1
,14
]}

机构：

[1] Univ Western Australia, Sch Phys, Crawley, WA 6009, Australia

[2] Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia

[3] Helmholtz Zentrum Geesthacht, Inst Mat Res, D-21502 Geesthacht, Germany

[4] Ruhr Univ Bochum, Dept Phys, D-44780 Bochum, Germany

[5] Petersburg Nucl Phys Inst, Gatchina 188350, Russia

[6] UNSW, Sch Phys Environm & Math Sci, Canberra, ACT 2600, Australia

[7] Curtin Univ Technol, Dept Imaging & Appl Phys, Perth, WA 6845, Australia

[8] Univ Barcelona, Dept Fis Fonamental, E-08028 Barcelona, Spain

[9] Univ Barcelona, Inst Nanociencia & Nanotecnol IN2UB, E-08028 Barcelona, Spain

[10] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[11] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60438 USA

[12] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[13] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[14] Univ Glasgow, Sch Phys & Astron, SUPA, Glasgow 612 8QQ, Lanark, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 12期

基金：

澳大利亚研究理事会; 英国工程与自然科学研究理事会;

关键词：

BIQUADRATIC EXCHANGE; ORIGIN;

D O I：

10.1103/PhysRevLett.107.127201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A detailed investigation of magnetic impurity-mediated interlayer exchange coupling observed in Cu0.94Mn0.06/Co multilayers using polarized neutron reflectometry and magnetic x-ray techniques is reported. Excellent descriptions of temperature and magnetic field dependent biquadratic coupling are obtained using a variant of the loose spin model that takes into account the distribution of the impurity Mn ions in three dimensions. Positional disorder of the magnetic impurities is shown to enhance biquadratic coupling via a new contribution J(2)(fluct), leading to a temperature dependent canting of magnetic domains in the multilayer. These results provide measurable effects on RKKY coupling associated with the distribution of impurities within planes parallel to the interfaces.

引用

页数：4

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