Abstract
We fabricated a magnetoelectric laminate structure consisting of a magnetostrictive Tb 0.3Dy 0.7Fe 1.92 (Terfenol-D) plate bonded to a La 0.7Ca 0.15Sr 0.15MnO 3 (LCSMO)/0.67Pb(Mg 1/3Nb 2/3)O 3-0.33PbTiO 3 (PMN–PT) structure where a LCSMO film was epitaxially grown on a PMN–PT single crystal substrate. When a dc magnetic field is applied perpendicular to the film plane, the magnetoresistance of the LCSMO film in the paramagnetic (ferromagnetic) state for the LCSMO/PMN–PT/Terfenol-D structure is larger (smaller) than that for the LCSMO/PMN–PT structure without Terfenol-D. These effects are caused by the magnetostriction-induced in-plane compressive strain in the Terfenol-D, which are transferred to the PMN–PT substrate, leading to a reduction in the in-plane tensile strain of the epitaxial LCSMO film and thereby modifying the magnetoresistance of the film.
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