Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3628464
Keywords
barium compounds; coercive force; dielectric polarisation; ferroelectric coercive field; ferromagnetic materials; interface magnetism; iron; magnetic anisotropy; magnetic thin films; magnetoelastic effects; metallic thin films
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Funding
- NEDO of Japan
- JSPS [22.00077]
- CASIO Science Promotion Foundation
- Grants-in-Aid for Scientific Research [10F00077, 23246113] Funding Source: KAKEN
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The manipulation of magnetism at Fe/BaTiO3 interfaces is demonstrated via lattice distortion induced by thermal and electrical means. We find that the magnetic coercivity shows similar electric field dependence for positive and negative electric fields in the tetragonal phase of BaTiO3, whereas those in the orthorhombic and rhombohedral phases vary asymmetrically with respect to the polarity. The temperature dependent magnetization also reveals that the effect has its origin in the strong magnetoelastic coupling at the interface. The underlying mechanisms of the electric field dependence of the coercivity are discussed, associated with the different ferroelectric poling processes of BaTiO3. (C) 2011 American Institute of Physics. [doi:10.1063/1.3628464]
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