Intrinsic exchange bias and its origin in spin-glass-like disordered La0.8Sr1.2CoO4 cobaltite

Exchange bias phenomena have been investigated in the single-layered perovskite cobaltite La0.8Sr1.2CoO4 exhibiting spin-glass-like behavior at low temperature. The field cooled magnetic hysteresis loops display both horizontal and vertical shifts. The training effect of exchange bias behavior is al...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2013-10, Vol.427, p.37-41
Main Authors: Mao, Jinhua, Sui, Yu, Wang, Xianjie, Wang, Yi, Zhang, Xingquan
Format: Article
Language:English
Subjects:
Bias
Clusters
Cobaltite
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Exchange and superexchange
Exchange and superexchange interactions
Exchange bias
Ferromagnetism
Field strength
Hysteresis
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects
Origins
Phases
Physics
Spin glass
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Summary:Exchange bias phenomena have been investigated in the single-layered perovskite cobaltite La0.8Sr1.2CoO4 exhibiting spin-glass-like behavior at low temperature. The field cooled magnetic hysteresis loops display both horizontal and vertical shifts. The training effect of exchange bias behavior is also observed, which can be explained in terms of a spin configuration relaxation model. In addition, exchange bias is found to depend strongly on measuring field as well as the cooling field. This behavior is suggested to originate from the interfacial exchange coupling between the disordered spin-glass-like phases and ferromagnetic clusters, where the spin configurations are affected by the field strength. This magnetically tunable exchange bias has the potential in view of the use of cobaltites in spintronics.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2013.06.030