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Journal of Materials Science: Materials in Electronics

, Volume 29, Issue 21, pp 18221–18230 | Cite as

Enhanced electrical and magnetic properties in BZT/NFO multiferroic composites derived by MARH

  • Arpana Singh
  • Kashif Shamim
  • Seema Sharma
  • Radheshyam Rai
  • Poonam Kumari
Article
  • 35 Downloads

Abstract

Multiferroic materials comprising of ferroelectric (FE) and ferromagnetic (FM) composites exhibits added functionalities significant from scientific and technological standouts. But these FE/FM composites are very sensitive to processing parameters, sintering, and chemical modifications. In present work FE/FM composites (1 − x)(Ba Zr0.15, Ti0.85)O3–xNiFe2O4 (BZT–NFO) was sintered by microwave assisted radiant heating (MARH) technique, which has evolved as a hybrid sintering technique, where radiant and microwave sintering methods are coupled together, in such a way that, when conventional radiant heating is applied for sintering, simultaneously different (0%, 15%, 30% and 50%) Microwave power (Mw) percentages are applied in a precise and controlled manner. The present study dwells on the role of different Mw power applied during sintering on the structure, dielectric, ferroelectric and magnetic properties of (1 − x) (Ba Zr0.15, Ti0.85) O3–xNiFe2O4 (BZT–NFO) composites. Structural phase analysis carried out by X-ray diffraction displays Bragg peaks corresponding to both perovskite and ferrite phases. Since the compositional variation of ferrite remains as low as 1% for all the compositions, the overall crystal phase is dominated by perovskite phase which was further confirmed by room temperature Raman spectra. No intermediate phase or structural transitions were observed for all the compounds. Dielectric permittivity increases by 35% for the sample sintered with 15% Mw power, while leakage current decreases by an order of magnitude. At higher temperature, mobility due to oxygen vacancies/or defects present in the samples dominates the conduction mechanism. Magnetic hysteresis curve at room temperature suggests the soft magnetic nature exhibiting ferromagnetic behavior for all the samples. Sample sintered with 15 Mw power exhibits higher saturation magnetization (Ms).

Notes

Acknowledgements

Authors wish to thank Dr V R Reddy, Dr V Sathe and Dr Mukul Gupta for MARH sintering, ferroelectric, X-ray Diffraction and Raman spectroscopic measurements of UGC-DAE Consortium for Scientific Research Indore Centre, Indore, India.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Materials Research Laboratory, Department of PhysicsA N CollegePatnaIndia
  2. 2.Department of PhysicsEternal UniversitySirmourIndia

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