Research Papers in Physics and Astronomy

 

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.

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