Nanometer-size magnetic domains and coherent magnetization reversal in a giant exchange-bias system

被引：22

作者：

Dufour, C. ^{[1
]}

Fitzsimmons, M. R. ^{[2
]}

Borchers, J. A. ^{[3
]}

Laver, M. ^{[4
,5
,6
]}

Krycka, K. L. ^{[3
]}

Dumesnil, K. ^{[1
]}

Watson, S. M. ^{[3
]}

Chen, W. C. ^{[3
,7
]}

Won, J. ^{[2
]}

Singh, S. ^{[2
,8
]}

机构：

[1] Univ Nancy 1, Phys Mat Lab, F-54506 Vandoeuvre Les Nancy, France

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[3] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA

[4] Paul Scherrer Inst, Lab Neutron Scattering, CH-5232 Villigen, Switzerland

[5] Tech Univ Denmark, Riso DTU, Div Mat Sci, DK-4000 Roskilde, Denmark

[6] Univ Copenhagen, Niels Bohr Inst, Nanosci Ctr, DK-2100 Copenhagen, Denmark

[7] Univ Maryland, College Pk, MD 20742 USA

[8] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 06期

基金：

美国国家科学基金会;

关键词：

ANISOTROPY; SCATTERING; LENGTH; FIELD; SANS;

D O I：

10.1103/PhysRevB.84.064420

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The role of magnetic domains and domain walls in exchange bias has stimulated much contemporary deliberation. Here we present compelling evidence obtained with small-angle scattering of unpolarized- and polarized-neutron beams that magnetization reversal occurs via formation of 10-100s nm-sized magnetic domains in an exchange-biased DyFe(2)/YFe(2) superlattice. The reversal mechanism is observed to involve rotation of magnetization in and out of the sample plane. Remarkably, the domains are arranged in a quasiperiodic manner in the plane of the sample. The length scale of domain formation is similar to that of structural defects at the seed-layer-superlattice interface.

引用

页数：11

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