Enhanced magnetization and magnetoelectric coupling in 1−x(BiFeO3)/x(La2/3Sr1/3MnO3) composites

• The 1−x(BFO)/x(LSMO) composites are prepared by solid state sintering method.
• The saturation magnetization enhances as we add the LSMO content to the BFO samples.
• The value of quadratic magnetoelectric coefficient β increases for the composite x = 0.10.
• Enhancement in β indicate the improvement in magnetoelectric coupling for sample x = 0.10.

In this study, we have synthesized BiFeO3 (BFO) and La2/3Sr1/3MnO3 (LSMO) composites, 1−x(BFO)/x(LSMO) with x = 0, 0.10, 0.20 and 0.30 by solid state sintering method. X-ray diffraction (XRD) patterns show the peaks corresponding to both BFO and LSMO phase, which indicates the successful formation of composites. Room temperature magnetization (M–H) versus field study shows that the saturation magnetization enhances from 0.147 to 3.04 emu/g as we add the LSMO content to the BFO samples from x = 0 to 0.30. The polarization versus electric field (P–E) loops, observed for pure BFO and 1−x(BFO)/x(LSMO) composite with x = 0.10, show that the value of maximum polarization increases from 0.48 to 0.79 μC/cm2 for the composite from x = 0 to x = 0.10. Magnetoelectric study reveals that the value of quadratic magnetoelectric coefficient β increases from 4.02 × 10−7 to 2.54 × 10−6 mV/cm-Oe2 for the composites x = 0 to x = 0.10, which indicates that the magnetoelectric coupling improves for the composite x = 0.10.

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