Abstract
We demonstrate a magnetoelectric nanocomposite, LiNbO3-CoFe2O4 (LNO-CFO), consisting of rhombohedral R3c LNO and R3m CFO phases. It is characterized by a maximum inverse magnetoelectric coefficient of 6.5 Oe cm·V−1 measured in a 106 V/m electric field, and a magnetic field dependent Vogel–Fulcher-like relaxation characterized by a relaxation time τ=τ0exp(−ΔH/k(Tm−TvfH)), τ0=29.66 s, ΔH=1.06 eV, TvfH represents the magnetic field-dependent Vogel-Fulcher temperature. The activation energy equals the activation energy of oxygen vacancy diffusion in niobate-based crystals. The room temperature electric field-induced magnetization change relaxes as τ=18.05 s.
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