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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