Locally controlled magnetic anisotropy in transcritical permalloy thin films using ferroelectric BaTiO3 domains

Published

November 26, 2014

Author(s)

Michael J. Donahue, Sean W. Fackler, Tieren Gao, Paris N. Nero, Sang-Wook Cheong, John Cumings, Ichiro Takeuchi

Abstract

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.

Citation

Applied Physics Letters

Pub Type

Journals

Download Paper

https://doi.org/10.1063/1.4902809

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Keywords

transcritical permalloy, ferroelectric, stripe domains, MFM, micromagnetics

Citation

Donahue, M. , Fackler, S. , Gao, T. , Nero, P. , Cheong, S. , Cumings, J. and Takeuchi, I. (2014), Locally controlled magnetic anisotropy in transcritical permalloy thin films using ferroelectric BaTiO3 domains, Applied Physics Letters, [online], https://doi.org/10.1063/1.4902809, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917314 (Accessed November 24, 2024)