Giant non-volatile magnetoelectric effects via growth anisotropy in Co 40 Fe 40 B 20 films on PMN-PT substrates

J. Wang, D. Pesquera, R. Mansell, S. Van Dijken, R. P. Cowburn, M. Ghidini*, N. D. Mathur

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)
54 Downloads (Pure)

Abstract

Uniaxial magnetic anisotropy was imposed on a CoFeB film by applying an in-plane magnetic field during growth. Electrically driven strain from a ferroelectric 0.68Pb(Mg 1/3 Nb 2/3 )O 3 -0.32PbTiO 3 (011) substrate resulted in giant magnetoelectric effects, whose coupling constant peaked at a record value of ∼8.0 × 10 -6 s m -1 . These large magnetoelectric effects arose due to non-volatile 90° rotations of the magnetic easy axis, reflecting a competition between the fixed growth anisotropy and the voltage-controlled magnetoelastic anisotropy. In contrast to previous work, our non-volatile rotations did not require the assistance of an applied magnetic field or the setting of an in-plane substrate polarization prior to deposition.

Original languageEnglish
Article number092401
Pages (from-to)1-4
Number of pages4
JournalApplied Physics Letters
Volume114
Issue number9
DOIs
Publication statusPublished - 4 Mar 2019
MoE publication typeA1 Journal article-refereed

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