Neutron scattering measurements of magnetic excitations in Gd/Y superlattices

被引：3

作者：

Gruenwald, A. T. D. ^{[1
]}

Wildes, A. R. ^{[2
]}

Schmidt, W. ^{[3
]}

Tartakovskaya, E. V. ^{[4
]}

Nowak, G. ^{[5
]}

Theis-Broehl, K. ^{[6
]}

Schreyer, A. ^{[1
]}

机构：

[1] GKSS Forschungszentrum Geesthacht GmbH, D-21502 Geesthacht, Germany

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[3] ILL, JCNS, Forschungszentrum Julich, IFF, F-38042 Grenoble, France

[4] Natl Acad Sci Ukraine, Inst Magnetism, UA-03142 Kiev, Ukraine

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

[6] Univ Appl Sci, Hsch Bremerhaven, D-27568 Bremerhaven, Germany

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 19期

关键词：

antiferromagnetic materials; gadolinium; magnetic multilayers; neutron diffraction; renormalisation; spin waves; yttrium;

D O I：

10.1063/1.3428425

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Neutron inelastic scattering has been used to measure the magnetic excitations as a function of applied magnetic field in an antiferromagnetically coupled Gd/Y superlattice. The excitations were measured along the c-axis, which is parallel to the normal of the interfaces and the sample growth direction. Dispersive spin waves were unambiguously detected on the application of a magnetic field. The spin waves are shown to renormalize with field following a basic model drawn from standard spin wave theory. The model required no free parameters aside from an initial amplitude. (C) 2010 American Institute of Physics. [doi:10.1063/1.3428425]

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页数：3

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