Evidence for charge mediated coupling in Fe-Ga/PMN-PT composite multiferroic

Abstract

We present an experimental study of the magnetoelectric coupling (MEC) in the Fe-Ga/PMN-PT thin film multiferroic composite by means of x-ray magnetic circular dichroism (XMCD) and ferromagnetic resonance (FMR). Our measurements show evidence for a charge mediated coupling mechanism, suggested by the asymmetric magnetic remanence (M${}_{rem}$) behaviour under opposite electric fields ($\pm$ E) and the asymmetric resonance field (H${}_r$) in the FMR measurements. Also, the FMR measurements reveal a perpendicular magnetic anisotropy (PMA), that can be related to an interface charge effect. and it is tunable by E field. Ab initio calculations support the existence of a charge mediated coupling at the Fe-Ga/PMN-PT interface.

arXiv comment7 pages, 5 figures, Supplemental Material

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Cited by in corpus (1)

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