Abstract
We investigated the electric field effect on the magnetic properties of the Pt or Ru/Cr2O3/Co/Pt structures fabricated by molecular beam epitaxy (MBE). The Cr2O3 layer fabricated using radical assisted MBE exhibits a high breakdown voltage (∼1.5 MV cm−1) comparable to the thicker films. Owing to interfacial perpendicular magnetic anisotropy, the Co layer exhibits a sufficiently large magnetic anisotropy energy (Keff > 1 × 106 J m−3). Further, a voltage-induced coercivity change is observed for the structure, with an efficiency of −0.5 mT V−1. The Cr2O3/Co multilayer is a promising structure for further investigation of the electric field effect of Co-based materials.
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