Journal
ACTA MATERIALIA
Volume 199, Issue -, Pages 495-503Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2020.08.041
Keywords
Magnetoelectric effect; Shear strain; Magnetic domain; Magneto-optical Kerr effect
Funding
- National Key R&D Program of China [2018YFB0407601]
- Natural Science Foundation of China [91964109, 51802248, 11534015, 51902247, 51802250]
- National 111 Project of China [B14040]
- Basic Research Program of Natural Science of Shaanxi Province [2020JQ-059]
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Strain-mediated magnetoelectric effect can be utilized as an energy-efficient approach for spin manipulation. However, over 90 degrees magnetization rotation is still challenging in un-patterned magnetic films, as the piezo-strain driven by ferroelectric domain switching is generally uniaxial rather than unidirectional, which limits the developments of non-volatile magnetic memory and logic devices. Here we demonstrate the rotation of local magnetization with a large angle of 136 degrees by applying strains with a shear component at a fixed magnetic field of 45 Oe in FeCoSiB/PMN-PT (011) multiferroic heterostructures, revealed by a vector-resolved quantitative magneto-optical Kerr effect (MOKE) microscopy. Phase-field simulations confirm that the approximate 140 degrees rotation of magnetization vectors is a consequence of the shear strain associated with ferroelectric/ferroelastic switching of PMN-PT (011) substrates. The visualization of over 90 degrees magnetization rotation induced by the strain with a shear component paves the way for deterministic magnetization switching that has important implications in the energy-efficient spintronic devices. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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