Giant converse magnetoelectric effect in a multiferroic heterostructure with polycrystalline Co2FeSi

Abstract To overcome a bottleneck in spintronic applications such as those of ultralow-power magnetoresistive random-access memory devices, the electric-field control magnetization vectors ferromagnetic electrodes has shown much promise. Here, we show giant converse magnetoelectric (CME) effect multiferroic heterostructure consisting Heusler alloy Co 2 FeSi and ferroelectric-oxide Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO (PMN-PT) for vectors. Using an in-plane uniaxial magnetic anisotropy polycrystalline film grown on PMN-PT(011), nonvolatile repeatable vector switchings remanent states are demonstrated. The CME coupling coefficient FeSi/PMN-PT(011) is over 1.0 × 10 −5 s/m at room temperature, comparable to single-crystalline Fe 1- x Ga /PMN-PT systems. been demonstrated by strain-induced variation energy with L 1 -ordered structure. This approach can lead new solution reduction write power architectures temperature.