Volume 56, Number 1, October 2001
|Page(s)||132 - 137|
|Section||Condensed matter: electronic structure, electrical, magnetic, and opticalproperties|
|Published online||01 December 2003|
Proximity-induced short-range spin density wave order in Fe/Cr multilayers
Laboratoire d'Etudes des Propriétés Electroniques des Solides
Associated with Université Joseph Fourier, CNRS BP 166,
38042 Grenoble Cedex 9, France
2 Russian Research Center "Kurchatov Institute" Kurchatov Square, 123182 Moscow, Russia
Accepted: 19 July 2001
To describe the magnetic phase diagram of Fe/Cr multilayers we propose an approach based on the Ginzburg-Landau expansion of the free energy in terms of a spin density wave (SDW) order parameter which is determined self-consistently. This approach shows the existence of short-range order with a characteristic width D close to the interfaces. Although not homogeneous this phase resembles the commensurate SDW identified in neutron experiments and determines the observed high-temperature transition temperature T1. The dependence of T1 on the Cr thickness L is in agreement with the experimental behaviour and the length 2D can be identified with the critical Cr thickness for the existence of the incommensurate SDW.
PACS: 75.70.Cn – Interfacial magnetic properties (multilayers) / 75.30.Fv – Spin-density waves
© EDP Sciences, 2001
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