Magneto-Thermal Behavior of a Granular FeCl₂–Fe Heterostructure

Authors

Sarbeswar Sahoo, University of Nebraska-LincolnFollow
Christian Binek, University of Nebraska-LincolnFollow
Wolfgang Kleemann, Angewandte Physik, Universität Duisburg-Essen, 47048 Duisburg, GermanyFollow

Date of this Version

1-1-2004

Comments

Published in Phase Transitions 77:1–2 (January–February 2004), pp. 217–224. Copyright © 2004 Taylor & Francis Ltd. Used by permission. http://www.tandf.co.uk/journals/titles/01411594.asp

Abstract

A granular system consisting of ferromagnetic single-domain Fe particles in an antiferromagnetic FeCl₂ matrix was prepared by coevaporation in an ultra-high vacuum environment. The structural and magnetic properties were investigated by X-ray diffractometry and superconducting quantum interference device magnetometry, respectively. The heterostructure combines the properties of superparamagnetic Fe granules and the antiferromagnetism of the FeCl₂ matrix. In addition, dipolar interaction-induced giant moments are observed below the Néel temperature of the FeCl₂ matrix. The thermomagnetic properties of the giant moments are studied.