Magnetoelectric coupling heterogeneous structure as well as preparation method and application thereof

The invention provides a magnetoelectric coupling heterogeneous structure as well as a preparation method and application thereof. The heterogeneous structure sequentially comprises a PMN-PT single crystal substrate, a Ta buffer layer, an NdFeB layer and a Ta covering layer. The heterogeneous structure provided by the invention is a brand-new multiferroic compound heterojunction taking a retentive alloy as a ferromagnetic layer. The magnetoelectric coupling heterogeneous structure has good hard magnetic property and a stronger inverse magnetoelectric coupling effect; the heterojunction has potential application values in aspects of magnetic recording, high-sensitivity magnetoelectric weak signal detectors, magnetic energy product adjustable micro permanent magnet materials, sensors, logic devices, electric control magnetic recording and the like.