Research Papers in Physics and Astronomy

 

Date of this Version

3-23-2005

Comments

Published in Physical Review Letters 94, 117203 (2005) (4 pages). ©2005 The American Physical Society. Used by permission. URL: http://link.aps.org/abstract/PRL/v94/e117203 doi:10.1103/PhysRevLett.94.117203

Abstract

The perpendicular exchange bias field, HEB, of the magnetoelectric heterostructure Cr2O3(111)/(Co/Pt)3 changes sign after field cooling to below the Néel temperature of Cr2O3 in either parallel or antiparallel axial magnetic and electric freezing fields. The switching of HEB is explained by magnetoelectrically induced antiferromagnetic single domains which extend to the interface, where the direction of their end spins controls the sign of HEB. Novel applications in magnetoelectronic devices seem possible.

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