Giant metamagnetic moments in a granular FeCl₂-Fe heterostructure

Authors

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

Date of this Version

11-25-2003

Comments

Published by American Physical Society. © 2003. Permission to use. Phys. Rev. B 68, 174431 (2003).

Abstract

Giant moments are observed at low temperatures in a granular FeCl₂-Fe heterostructure owing to a local metamagnetic transformation of the antiferromagnetic (AF) FeCl₂ matrix due to dipolar interactions. A model of metamagnetically (MM) "dressed" single-domain Fe particles is suggested to explain the observations. These include polydispersive ac susceptibility induced by AF-MM domain configurations and weak exchange bias due to non-spin-flipped AF crystallites.