Abstract
The experimental observation and analysis of self-biased magnetoelectric (ME) coupling effect in the layered La0.7Sr0.3MnO3/BaTiO3/La0.7Sr0.3MnO3 (LSMO/BTO/LSMO) multiferroic heterostructure were reported, and the epitaxial layered LSMO/BTO/LSMO heterostructure was grown on (001) oriented LaAlO3 (LAO) single crystal substrate by using pulsed laser deposition technique. The microstructure, ferromagnetic and ferroelectric properties were studied. The exchange bias effect in the LSMO/LAO interface and the compressive strain gradient field in the heterostructure induced by lattice mismatch resulted in a built-in magnetic bias field (Hbias) in the LSMO layer, which provided limited ME coupling effect at zero applied DC bias magnetic field. It may potentially be used to micro-nano devices especially for multiple state memories.
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