Magnetic states of granular layered CoFe-Al₂O₃

Authors

J.B. Sousa, IFIMUP, Faculdadede Ciencias, Universidade do Porto, Rua do Campo Alegre Porto, Portugal
G.N. Kakazei, Institute of Magnetism NAS of Kiev, Ukraine
Y.G. Pogorelov, Universidade do Porto, Rua do Campo Alegre, Portugal.
J.A.M. Santos, IFIMUP, Faculdadede Ciencias, Universidade do Porto, Rua do Campo Alegre Porto, Portugal
O. Petracic, Laboratorium für Angewandte Physik, Gerhard-Mercator-Universität, Duisburg, Germany
Wolfgang Kleemann, Physik, Gerhard-Mercator-Universität, 47048 Duisburg, Germany.Follow
Christian Binek, University of Nebraska-LincolnFollow
Susana Cardoso de Freitas, INESC, Rua Alves Redol 9-1, Lisbon, PortugalFollow
P.P. Freitas, INESC, Rua Alves Redol 9-1, Lisbon, Portugal
M.M. Pereira de Azevedo, Universidade do Aveiro, Aveiro, Portugal.
N.A. Lesnik, Institute of Magnetism NAS of Ukraine, Kiev, Ukraine.
Stanislav Rokhlin, Ohio State UniversityFollow
P.E. Wigen, Ohio State Universit

Date of this Version

7-4-2001

Comments

Published by IEEE. ©2001 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. IEEE Trans. Magn. 37, 2200 (2001). http://www.ieee.org/.

Abstract

The granular layered magnetic system Co₈₀Fe₂₀(t)/Al₂ O₃ (3 nm), where the Co₈₀Fe₂₀ layers of nominal thickness t form separate, almost spherical magnetic granules of typical diameter 2-3 nm between the Al₂O₃ spacers, was studied. We discuss measurements of the dc and ac magnetic susceptibility χ for 1 nm