Abstract
The solid solutions of La0.7Ba0.3MnO3-BaTiO3 were first prepared by a solid state method. The XRD showed that the solid solutions formed when the BaTiO3 transformed from tetragonal to hexagonal phase with sintering temperature increasing. The samples with hexagonal phase exhibited relative large magneto-electric effects. For the sample sintered at 1475 °C, the measured maximum magneto-electric coefficient was 48.6 mV/cmOe, obtained at a frequency of 30 kHz. The first-principles calculations indicated that the magnetic-electric coupling was attributed to the off-centering of Mn ions in coplanar octahedrons in the hexagonal phase. The present results suggest a new candidate for a room temperature multiferroic material with magneto-electric effects.
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