Electrical tuning of magnetism in Fe3O4/PZN-PT multiferroic heterostructures derived by reactive magnetron sputtering

被引：129

作者：

Liu, Ming ^{[1
]}

Obi, Ogheneyunume ^{[1
]}

Cai, Zhuhua ^{[2
]}

Lou, Jing ^{[1
]}

Yang, Guomin ^{[1
]}

Ziemer, Katherine S. ^{[2
]}

Sun, Nian X. ^{[1
]}

机构：

[1] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA

[2] Northeastern Univ, Dept Chem Engn, Boston, MA 02115 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 07期

基金：

美国国家科学基金会;

关键词：

All Open Access; Green;

D O I：

10.1063/1.3354104

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Strong magnetoelectric (ME) coupling was demonstrated in Fe3O4/PZN-PT (lead zinc niobate-lead titanate) multiferroic heterostructures obtained through a sputter deposition process. The dependence of the magnetic anisotropy on the electric field (E-field) is theoretically predicted and experimentally observed by ferromagnetic resonance spectroscopy. A large tunable in-plane magnetic anisotropy of up to 600 Oe, and tunable out-of-plane anisotropy of up to 400 Oe were observed in the Fe3O4/PZN-PT multiferroic heterostructures, corresponding to a large ME coefficient of 100 Oe cm/kV in plane and 68 Oe cm/kV out of plane, which match well with predicted results. In addition, the electric field manipulation of magnetic anisotropy is also demonstrated by the electric fields dependence of magnetic hysteresis loops, showing a large squareness ratio change of 44%. These Fe3O4/PZN-PT multiferroic heterostructures exhibiting large E-field tunable magnetic properties provide great opportunities for novel electrostatically tunable multiferroic devices. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3354104]

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