Room temperature magnetoelectric coupling in BaTi1-xCrxO3 multiferroic thin films

We report on room temperature (RT) magnetoelectric coupling in tetragonal BaTi1-xCrxO3 thin film multiferroics (BTCO) sputter deposited on (100) SrTiO3 (where x = 0.005, 0.01, 0.02, and 0.03). As-deposited thin films are vacuum annealed by electron beam rapid thermal annealing technique. 50 nm thick BTCO with "x = 0.01" shows RT ferromagnetic and ferroelectric response with saturation magnetic moment of 1120 emu/cc and polarization of 14.7 microcoulomb/cm(2). Piezoresponse/magnetic force microscope images shows RT magnetoelectric coupling in BTCO with "x = 0.01," which is confirmed using magnetocapacitance measurement where an increase in capacitance from 17.5 pF to 18.4 pF is observed with an applied magnetic field. (C) 2016 AIP Publishing LLC.