| Autor: |
Bo Chen, Yong-Chao Li, Jun-Yong Wang, Jian-Guo Wan, Jun-Ming Liu |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 2014, Vol. 115 Issue 4, p1-6, 6p |
| Abstrakt: |
Multiferroic SrTiO3/(Co0.9Zn0.1)Fe2O4 (STO/CZFO) films with preferential crystallographic orientations were prepared by a sol-gel process. The films exhibited evident ferroelectricity and well-defined ferromagnetic characteristics with certain magnetic anisotropy. Remarkable suppression of ferroelectric polarization by in-plane magnetic field and great enhancement under out-of-plane magnetic field were realized, and large anisotropic magnetodielectric effect was observed. We showed that the ferroelectric polarization of the whole film was closely related to the defect dipoles in the STO layer. Based on the model where the dissociation or formation of defect dipoles is associated with the volume change of STO unit cells, we elucidated the mechanism of anisotropic magnetic-manipulation of ferroelectric polarization for the films, and attributed it to the rearrangement of oxygen vacancies in the STO layer, which was controlled by the ferromagnetic CZFO layer through interface coupling under external magnetic field. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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