Improving electric field controlled magnetism of micron-scale-thickness Fe71Ga17B12 film on Pb(Mg1/3Nb2/3)0.7O3-PbTi0.3O3 by multilayer preparation method

Abstract Enhancing electric field controlled magnetism of micron-scale-thickness ferromagnetic film is of great significance to improve the performance of magnetoelectric (ME) sensors, ME tunable inductors and other ME devices. In order to achieve above purpose, multilayer preparation method was proposed and validated by experiment studies on multilayer (Cu(10 nm)/(FeGaB(100 nm)/Cu(5 nm))10) and monolayer (Cu(10 nm)/FeGaB (1000 nm)/Cu(5 nm)) samples, respectively. The results show the electric field controlled magnetism could be enhanced obviously by the multilayer preparation method. Meanwhile, the finite element simulation model was established to analyze possible causes for the improvement of electric field controlled magnetism in multilayer sample. The model revealed that multilayer preparation can reduce the in-plane demagnetizing factor and increase the internal magnetic field of the magnetic materials, thus enhancing electric field controlled magnetism. This work is conducive to the development of micron-scale-thickness films in electric field control of magnetism, which contributes to the application of ferroelectric/ferromagnetic heterostructures in ME devices.