Abstract
Being able to tune magnetic anisotropy (MA) by an electric field is crucial for the development of low-power magnetoelectric devices. The authors present an approach for tuning the MA of a manganite film by modulating the crystal phase of a cobaltite cap layer. By driving the cap layer to switch between SrCoO${}_{2.5}$ and SrCoO${}_{3\ensuremath{-}\ensuremath{\delta}}$ structures, reversible tuning of MA between two crystal directions was achieved for the manganite layer, accompanying a change in Mn $3d$ orbital occupancy. This work demonstrates indirect tuning of the magnetic easy axis of this highly spin-polarized manganite, providing guidance for constructing electrically tunable magnetoelectric devices.
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