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Improved magneto-electric response in Na0.5Bi0.5TiO3–MnFe2O4 composites

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Abstract

Magneto-electric composites comprising Na0.5Bi0.5TiO3 (NBT) and MnFe2O4 (MFO) were fabricated using their fine powders obtained via sol–gel method. X-ray diffraction and scanning electron microscopy results confirmed the single-phase formation of NBT and MFO and the composite nature when these were mixed and sintered at appropriate temperatures. The dielectric constant (εr) and dielectric loss (D) decreased with increase in frequency (40–110 MHz). Room temperature magnetization measurements established these composites to be soft magnetic. Further, the nature of these composites were established to be magneto-electric at 300 K. The highest ME response of 0.19 % was observed in 30NBT–70MFO composite. The ME coefficient (α) was 240 mV/cm Oe for the same composition. The present study demonstrated the effectiveness of NBT/MFO as a lead-free multiferroic composite and provides an alternative for environment-friendly ME device applications.

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Acknowledgments

K. Praveena thanks University Grants Commission (UGC), New Delhi for Dr D.S. Kothari Postdoctoral Fellowship.

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  1. Materials Research Centre, Indian Institute of Science, Bangalore, 560012, India

    K. Praveena & K. B. R. Varma

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  1. K. Praveena
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Correspondence to K. Praveena.

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Praveena, K., Varma, K.B.R. Improved magneto-electric response in Na0.5Bi0.5TiO3–MnFe2O4 composites. J Mater Sci: Mater Electron 25, 111–116 (2014). https://doi.org/10.1007/s10854-013-1557-8

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  • DOI: https://doi.org/10.1007/s10854-013-1557-8

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