Asymmetric Magnetization Reversal Probed by Recoil Loop Measurements inan Exchange Biased La0.67Sr0.33MnO3/La0.33Ca0.67MnO3 Bilayer Film
WANG Zhi-Hong1, H. -U. HABERMEIER2, G. CRISTIANI2, SUN Ji-Rong1, SHEN Bao-Gen1
1State Key Laboratory of Magnetism, Institute ofPhysics, Chinese Academy of Sciences, PO Box 603, Beijing 1000802Max-Planck-Institut fur Festko perforschung, Heisenbergstrasse 1, D-70569, Stuttgart, Germany
Asymmetric Magnetization Reversal Probed by Recoil Loop Measurements inan Exchange Biased La0.67Sr0.33MnO3/La0.33Ca0.67MnO3 Bilayer Film
WANG Zhi-Hong1;H. -U. HABERMEIER2;G. CRISTIANI2;SUN Ji-Rong1;SHEN Bao-Gen1
1State Key Laboratory of Magnetism, Institute ofPhysics, Chinese Academy of Sciences, PO Box 603, Beijing 1000802Max-Planck-Institut fur Festko perforschung, Heisenbergstrasse 1, D-70569, Stuttgart, Germany
摘要We exploit the recoil loop measurements to study the asymmetric magnetization reversal in an exchange-biased La0.37Sr0.33MnO3/La0.33Ca0.67MnO3 bilayer film. It is found that the recoil curve encloses a marked area only in the second quadrant of the hysteresis loop, and the recoil susceptibility in the descending branch of the major loop is evidently higher than that in the ascending branch. The study indicates that the exchange anisotropy of a unidirectional nature and an orientation deviated from the easy axis of the ferromagnetic layer plays a crucial role in creating the reversal asymmetry.
Abstract：We exploit the recoil loop measurements to study the asymmetric magnetization reversal in an exchange-biased La0.37Sr0.33MnO3/La0.33Ca0.67MnO3 bilayer film. It is found that the recoil curve encloses a marked area only in the second quadrant of the hysteresis loop, and the recoil susceptibility in the descending branch of the major loop is evidently higher than that in the ascending branch. The study indicates that the exchange anisotropy of a unidirectional nature and an orientation deviated from the easy axis of the ferromagnetic layer plays a crucial role in creating the reversal asymmetry.
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2008, Vol. 25 
