Local control of magnetic anisotropy in transcritical permalloy thin films using ferroelectric BaTiO3 domains

We investigated the local coupling between dense magnetic stripe domains in transcritical permalloy (tPy) thin films and ferroelectric domains of BaTiO3 single crystals in a tPy/BaTiO3 heterostructure. Two distinct changes in the magnetic stripe domains of tPy were observed from the magnetic force m...

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Bibliographic Details
Published in:Applied physics letters 2014-11, Vol.105 (21)
Main Authors: Fackler, Sean W., Donahue, Michael J., Gao, Tieren, Nero, Paris N. A., Cheong, Sang-Wook, Cumings, John, Takeuchi, Ichiro
Format: Article
Language:English
Subjects:
Anisotropy
Applied physics
Barium titanates
Curie temperature
Ferroelectric domains
Ferroelectric materials
Ferroelectricity
Ferrous alloys
Heterostructures
Magnetic alloys
Magnetic anisotropy
Magnetic fields
Magnetism
Magnetostriction
Single crystals
Thin films
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Summary:We investigated the local coupling between dense magnetic stripe domains in transcritical permalloy (tPy) thin films and ferroelectric domains of BaTiO3 single crystals in a tPy/BaTiO3 heterostructure. Two distinct changes in the magnetic stripe domains of tPy were observed from the magnetic force microscopy images after cooling the heterostructure from above the ferroelectric Curie temperature of BaTiO3 (120 °C) to room temperature. First, an abrupt break in the magnetic stripe domain direction was found at the ferroelectric a-c-domain boundaries due to an induced change in in-plane magnetic anisotropy. Second, the magnetic stripe domain period increased when coupled to a ferroelectric a-domain due to a change in out-of-plane magnetic anisotropy. Micromagnetic simulations reveal that local magnetic anisotropy energy from inverse magnetostriction is conserved between in-plane and out-of-plane components.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4902809