Electrical Controlled Magnetism In Fept Film With The Coexistence Of Two Phases

A series of FePt films with different magnetic structures are deposited on Pb(Mg1/3Nb2/3)O-3-PbTiO3 substrates. By applying an electric field across the piezoelectric single crystal substrate, an magnetoelectric effect is observed in FePt/Pb(Mg1/3Nb2/3)O-3-PbTiO3 heterostructure due to the phase transformation between face-centered cubic and face-centered tetragonal phases in the film. Taking advantage of the different coercivity caused by the electric field, the sign of magnetization can be manipulated reversibly at room temperature with the electric field switching on or off. Based on this experimental result, we demonstrate a model for the technology of information storage, in which data can be written electrically without false writing. (C) 2015 AIP Publishing LLC.