Uncompensated magnetization and exchange-bias field in La0.7Sr0.3MnO3/YMnO3 bilayers: The influence of the ferromagnetic layer

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:323

Article

Zandalazini, C.¹  Esquinazi, P.¹  Bridoux, G.¹  Barzola-Quiquia, J.¹  Ohldag, H.²  Arenholz, E.³ 

[1] Univ Leipzig, Div Superconductiv & Magnetism, D-04103 Leipzig, Germany

[2] Stanford Univ, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

关键词: Exchange-bias effect;    Magnetic bilayer;    Magnetic oxide;   

DOI  :  10.1016/j.jmmm.2011.06.053

来源: Elsevier

【 摘 要 】

We studied the magnetic behavior of bilayers of multiferroic and nominally antiferromagnetic o-YMnO3 (375 nm thick) and ferromagnetic La0.7Sr0.3MnO3 and La0.67Ca0.33MnO3 (8 ... 225 nm), in particular the vertical magnetization shift M-E and exchange-bias field H-E for different thickness and magnetic dilutions of the ferromagnetic layer at different temperatures and cooling fields. We have found very large M-E shifts equivalent to up to 100% of the saturation value of the o-YMO layer alone. The overall behavior, including XMCD magnetization shift measured at the Mn-L edge of the LSMO layer only, indicates that the properties of the ferromagnetic layer contribute substantially to the M-E shift and that this does not correlate straightforwardly with the measured exchange-bias field H-E. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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