Strong Magnetoelectric Coupling in La 0.7Ba 0.3Mn0 3 Embedded Poly(Vinylidenefluoride-Co-Trifluoroethylene) Flexible Nano-Composite Films at Room Temperature

Abstract

Magnetoelectric coupling of La_0.7Ba_0.3MnO₃/ poly(vinylidenefluoride-co-trifluoroethylene) nano-composite (0-3) films were studied by varying the volume fraction of La_0.7Ba_0.3MnO₃ in polymer matrix for both non-poled and electrically poled conditions. The transverse magnetoelectric coupling-coefficient (α^V31) value is larger compared to αV₃₃ (logitudinal coupling-coeffcient) for both non-poled and electrically poled films. Poled composite films are showing highest αV³¹ = 121.44 mV/Oe-cm at 10 kHz for 0.5% volume fraction of La_0.7Ba_0.3MnO₃. These films generate self-biased voltage 9.1 mV on application of 25Oe alternating magnetic field (H_ac). The dependence of αV₃₁ on static magnetic field (H_dc), H_ac and frequency for these films is also reported.