Exchange-bias field and uncompensated magnetization in La0.7Sr0.3MnO3/YMnO3 bilayers

Monastery Irsee/Augsburg, Germany

Workshop; International Workshop Monastery Irsee, Topic: Functionality of Oxide Interfaces and Multiferroic Materials; 2010

Martin Luther University Halle-​Wittenberg

Exchange bias (EB) is a phenomena associated with the exchange anisotropy created in the interface of systems composed of an antiferromagnetic (AFM) and a ferromagnetic (FM) phases when they are cooled since a temperature between the Néel temperature (TN) of AFM and the Curie temperature (TC) of FM in presence of the magnetic field [1,2]. This phenomenon produces a field shift of the magnetization loop center, defined as HE=(HC+HC-)/2. Another effect found in these systems is the shift in the magnetic moment, defined as mshift=(mS++mS-)/2 . We studied the magnetic behavior of bilayers of multiferroic (AFM) orthorhombic o-YMnO3 (YMO) and ferromagnetic (FM) La0,7Sr0,3MnO3 (LSMO), in particular the vertical magnetization shift ME and exchange bias field HE for different thickness and magnetic dilution of the FM layer at different temperatures and cooling fields.