Magnetic anisotropy modulation of magnetite in Fe3O4/BaTiO3(100) epitaxial structures

C. A. F. Vaz; J. Hoffman; A. -B. Posadas; C. H. Ahn

doi:10.1063/1.3069280

Magnetic anisotropy modulation of magnetite in Fe3O4/BaTiO3(100) epitaxial structures

Materials Science 2010-03-09 v1

Authors: C. A. F. Vaz , J. Hoffman , A. -B. Posadas , C. H. Ahn

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Abstract

Temperature dependent magnetometry and transport measurements on epitaxial Fe3O4 films grown on BaTiO3(100) single crystals by molecular beam epitaxy show a series of discontinuities, that are due to changes in the magnetic anisotropy induced by strain in the different crystal phases of BaTiO3. The magnetite film is under tensile strain at room temperature, which is ascribed to the lattice expansion of BaTiO3 at the cubic to tetragonal transition, indicating that the magnetite film is relaxed at the growth temperature. From the magnetization versus temperature curves, the variation in the magnetic anisotropy is determined and compared with the magnetoelastic anisotropies. These results demonstrate the possibility of using the piezoelectric response of BaTiO3 to modulate the magnetic anisotropy of magnetite films.

Keywords

magnetic anisotropy magnetite epitaxial structures Fe3O4 BaTiO3 molecular beam epitaxy

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@article{arxiv.0812.3930,
  title  = {Magnetic anisotropy modulation of magnetite in Fe3O4/BaTiO3(100) epitaxial structures},
  author = {C. A. F. Vaz and J. Hoffman and A. -B. Posadas and C. H. Ahn},
  journal= {arXiv preprint arXiv:0812.3930},
  year   = {2010}
}

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4 pages, 4 figures

Magnetic anisotropy modulation of magnetite in Fe3O4/BaTiO3(100) epitaxial structures

Abstract

Keywords

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