Direct measurement of depth-dependent Fe spin structure during magnetization reversal in Fe/MnF2 exchange-coupled bilayers

被引：18

作者：

Macedo, W. A. A. ^{[1
]}

Sahoo, B. ^{[2
]}

Eisenmenger, J. ^{[3
]}

Martins, M. D. ^{[1
]}

Keune, W. ^{[2
,4
]}

Kuncser, V. ^{[5
]}

Roehlsberger, R. ^{[6
]}

Leupold, O. ^{[7
]}

Rueffer, R. ^{[7
]}

Nogues, J. ^{[8
,9
]}

Liu, Kai ^{[10
]}

Schlage, K. ^{[11
]}

Schuller, Ivan K. ^{[12
]}

机构：

[1] Ctr Desenvolvimento Tecnol Nucl, BR-31270901 Belo Horizonte, MG, Brazil

[2] Univ Duisburg Essen, D-47048 Duisburg, Germany

[3] Univ Ulm, D-89081 Ulm, Germany

[4] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany

[5] Natl Inst Mat Phys, Bucharest 77125, Romania

[6] Deutsch Elekt Synchrotron, D-22067 Hamburg, Germany

[7] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[8] ICREA, E-08193 Bellaterra, Spain

[9] Inst Catal Nanotecnol, E-08193 Bellaterra, Spain

[10] Univ Calif Davis, Davis, CA 95616 USA

[11] Univ Rostock, D-18051 Rostock, Germany

[12] Univ Calif San Diego, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 22期

关键词：

exchange interactions (electron); ferromagnetic materials; interface magnetism; iron; iron compounds; magnetic domain walls; magnetic structure; magnetic thin films; magnetisation reversal;

D O I：

10.1103/PhysRevB.78.224401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We measured directly the depth-dependent Fe spin rotation upon magnetization reversal in exchange-coupled Fe/MnF2 bilayers using nuclear resonant scattering of synchrotron radiation from an Fe-57-probe layer buried at different depths within the Fe film. Our results show that the exchange-biased ferromagnetic layer develops a noncollinear spin structure along the film normal direction, reminiscent of a partial domain wall parallel to the Fe/MnF2 interface. This is contrary to most theoretical models of exchange bias which assume a collinear spin structure in the ferromagnetic layer.

引用

页数：4

共 30 条

[1] Perpendicular interlayer coupling in Ni80Fe20/NiO/Co trilayers -: art. no. 027201 [J].

Camarero, J ;

Pennec, Y ;

Vogel, J ;

Bonfim, M ;

Pizzini, S ;

Ernult, F ;

Fettar, F ;

Garcia, F ;

Lançon, F ;

Billard, L ;

Dieny, B ;

Tagliaferri, A ;

Brookes, NB .

PHYSICAL REVIEW LETTERS, 2003, 91 (02)

[2] Exchange bias model for Fe/FeF2:: Role of domains in the ferromagnet [J].

Kiwi, M ;

Mejía-López, J ;

Portugal, RD ;

Ramírez, R .

EUROPHYSICS LETTERS, 1999, 48 (05) :573-579

[3] Exchange-bias systems with compensated interfaces [J].

Kiwi, M ;

Mejía-López, J ;

Portugal, RD ;

Ramírez, R .

APPLIED PHYSICS LETTERS, 1999, 75 (25) :3995-3997

[4] Exchange bias theory [J].

Kiwi, M .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2001, 234 (03) :584-595

[5] Calculations of exchange bias in thin films with ferromagnetic/antiferromagnetic interfaces [J].

Koon, NC .

PHYSICAL REVIEW LETTERS, 1997, 78 (25) :4865-4868

[6] Origin of complex exchange anisotropy in Fe/MnF2 bilayers -: art. no. 054430 [J].

Krivorotov, IN ;

Leighton, C ;

Nogués, J ;

Schuller, IK ;

Dan Dahlberg, E .

PHYSICAL REVIEW B, 2003, 68 (05)

[7] Relation between exchange anisotropy and magnetization reversal asymmetry in Fe/MnF2 bilayers -: art. no. 100402 [J].

Krivorotov, IN ;

Leighton, C ;

Nogués, J ;

Schuller, IK ;

Dahlberg, ED .

PHYSICAL REVIEW B, 2002, 65 (10) :1-4

[8] SURFACE STUDY OF FE BY MOSSBAUER-EFFECT [J].

LAUER, J ;

KEUNE, W ;

SHINJO, T .

PHYSICA B & C, 1977, 86 (JAN-M) :1409-1411

[9] Competing interfacial exchange and Zeeman energies in exchange biased bilayers [J].

Leighton, C ;

Nogués, J ;

Suhl, H ;

Schuller, IK .

PHYSICAL REVIEW B, 1999, 60 (18) :12837-12840

[10] Changes in ferromagnetic spin structure induced by exchange bias in Fe/MnF2 films -: art. no. 224414 [J].

Macedo, WAA ;

Sahoo, B ;

Kuncser, V ;

Eisenmenger, J ;

Felner, I ;

Nogués, J ;

Liu, K ;

Keune, W ;

Schuller, IK .

PHYSICAL REVIEW B, 2004, 70 (22) :224414-1

← 1 2 3 →