Impurity Spin Magnetization of Thin Fe Doped Au Films

E. Seynaeve; K. Temst; F. G. Aliev; C. Van Haesendonck; V. N. Gladilin; V. M. Fomin; J. T. Devreese

doi:10.1103/PhysRevLett.85.2593

Impurity Spin Magnetization of Thin Fe Doped Au Films

E. Seynaeve, K. Temst, F. G. Aliev, C. Van Haesendonck, V. N. Gladilin, V. M. Fomin, and J. T. Devreese

Phys. Rev. Lett. 85, 2593 – Published 18 September 2000

Abstract

In order to probe the influence of the surface-induced anisotropy on the impurity spin magnetization, we measure the anomalous Hall effect in thin AuFe films at magnetic fields up to 15 T. The observed suppression of the anomalous Hall resistivity at low fields as well as the appearance of a minimum in the differential Hall resistivity at higher fields can be explained by our theoretical model, which takes into account the influence of a polycrystalline film structure on the surface-induced anisotropy. Our results imply that the apparent discrepancy between different experimental results for the size effects in dilute magnetic alloys can be linked to a different microstructure of the samples.

Received 30 August 1999

DOI:https://doi.org/10.1103/PhysRevLett.85.2593

Authors & Affiliations

E. Seynaeve, K. Temst, F. G. Aliev^*, and C. Van Haesendonck

Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium

V. N. Gladilin^†, V. M. Fomin^‡,§, and J. T. Devreese^∥,¶

Theoretische Fysica van de Vaste Stof, Departement Natuurkunde, Universiteit Antwerpen (UIA), Universiteitsplein 1, B-2610 Antwerpen, Belgium

^*Present address: Departamento de Física de la Materia Condensada, C-3, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
^†Permanent address: Department of Theoretical Physics, State University of Moldova, strada A. Mateevici 60, MD-2009 Kishinev, Republic of Moldova.
^‡
^§Also at Technische Universiteit Eindhoven, P.O. Box 513, NL-5600 MB Eindhoven, The Netherlands.
^∥
^¶Also at Universiteit Antwerpen (RUCA), Groenenborgerlaan 171, B-2020 Antwerpen, Belgium.