Mechanisms of exchange bias with multiferroic BiFeO3 epitaxial thin films

被引：231

作者：

Bea, H. ^{[1
]}

Bibes, M. ^{[1
]}

Ott, F. ^{[2
]}

Dupe, B. ^{[1
]}

Zhu, X. -H. ^{[1
]}

Petit, S. ^{[2
]}

Fusil, S. ^{[1
]}

Deranlot, C. ^{[1
]}

Bouzehouane, K. ^{[1
]}

Barthelemy, A. ^{[1
]}

机构：

[1] CNRS Thales, Unite Mixte Phys, F-91767 Palaiseau, France

[2] CEA, CNRS, UMR12, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.100.017204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have combined neutron scattering and piezoresponse force microscopy to show that the exchange field in CoFeB/BiFeO3 heterostructures scales with the inverse of the ferroelectric and antiferromagnetic domain size of the BiFeO3 films, as expected from Malozemoff's model of exchange bias extended to multiferroics. Accordingly, polarized neutron reflectometry reveals the presence of uncompensated spins in the BiFeO3 film at the interface with CoFeB. In view of these results, we discuss possible strategies to switch the magnetization of a ferromagnet by an electric field using BiFeO3.

引用

页数：4

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