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VIDEO DOI: https://doi.org/10.48448/yhgq-tg95

technical paper

MMM 2022

November 07, 2022

Minneapolis, United States

Large Converse Magnetoelectric Effect in Strain Engineered Multiferroic Heterostructures

Magnetoelectric materials present a unique opportunity for electric field-controlled magnetism. Even though strain-mediated multiferroic heterostructures have shown unprecedented increase in magnetoelectric coupling compared to single-phase materials, further improvements must be made before ultra-low power memory, logic, magnetic sensors, and wide spectrum antennas can be realized. Previously, we demonstrated strain control and converse magnetoelectric coupling in Fe0.5Co0.5/Ag multilayers on (011) Pb(In1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 piezoelectric crystals 1. In this presentation, we will reveal how magnetoelectric coupling can be enhanced by simultaneously exploiting multiple strain engineering approaches by both applying strain during measurement, as well as growing the films with the substrates under compressive stress 2. When both grown and measured under strain, these heterostructures exhibit an effective converse magnetoelectric coefficient in the order of 10–5 s m–1: the highest directly measured, non-resonant value to-date. This response occurred at room temperature and at low electric fields (<2 kV cm–1). This large effect is enabled by magnetization reorientation caused by changing the magnetic anisotropy with strain from the substrate and the use of multilayered magnetic materials to minimize the internal stress from deposition. Additionally, the coercive field dependence of the magnetoelectric response under strain suggests contributions from domain-mediated magnetization switching modified by voltage-induced magnetoelastic anisotropy. This work will highlight how multicomponent strain engineering enables enhanced magnetoelectric coupling in heterostructures and provides an approach to realize energy-efficient magnetoelectric applications.


Transcript English (automatic)

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Enhancement of phase transition temperature beyond room temperature by formation of Ga0.8Fe1.2O3 – Y3Fe5O12 composite

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Swarnali Hait and 1 other author

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