Temperature dependent magnetometry and transport measurements on epitaxial films grown on single crystals by molecular beam epitaxy show a series of discontinuities, due to changes in the magnetic anisotropy induced by strain from the different crystal phases of . The magnetite film is under tensile strain at room temperature, which is ascribed to the lattice expansion of 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 to modulate the magnetic anisotropy of magnetite films.
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12 January 2009
Research Article|
January 15 2009
Magnetic anisotropy modulation of magnetite in epitaxial structures Available to Purchase
C. A. F. Vaz;
C. A. F. Vaz
a)
Department of Applied Physics and CRISP,
Yale University
, New Haven, Connecticut 06520, USA
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J. Hoffman;
J. Hoffman
Department of Applied Physics and CRISP,
Yale University
, New Haven, Connecticut 06520, USA
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A.-B. Posadas;
A.-B. Posadas
Department of Applied Physics and CRISP,
Yale University
, New Haven, Connecticut 06520, USA
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C. H. Ahn
C. H. Ahn
Department of Applied Physics and CRISP,
Yale University
, New Haven, Connecticut 06520, USA
Search for other works by this author on:
C. A. F. Vaz
a)
Department of Applied Physics and CRISP,
Yale University
, New Haven, Connecticut 06520, USA
J. Hoffman
Department of Applied Physics and CRISP,
Yale University
, New Haven, Connecticut 06520, USA
A.-B. Posadas
Department of Applied Physics and CRISP,
Yale University
, New Haven, Connecticut 06520, USA
C. H. Ahn
Department of Applied Physics and CRISP,
Yale University
, New Haven, Connecticut 06520, USA
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
Appl. Phys. Lett. 94, 022504 (2009)
Article history
Received:
November 14 2008
Accepted:
December 19 2008
Citation
C. A. F. Vaz, J. Hoffman, A.-B. Posadas, C. H. Ahn; Magnetic anisotropy modulation of magnetite in epitaxial structures. Appl. Phys. Lett. 12 January 2009; 94 (2): 022504. https://doi.org/10.1063/1.3069280
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