Magnetoelectric coupling of manganese ferrite–potassium niobate lead-free composite ceramics synthesized by solid state reaction method

  • P. KomalavalliEmail author
  • I. B. Shameem Banu
  • M. Shahid Anwar


Lead-free composite ceramics xMnFe2O4-(1 − x) KNbO3 with the composition of x = 0.20, 0.30 and 0.40 were synthesized by the solid state reaction method to obtain the composites of ferrite and ferroelectric to achieve magnetoelectric coupling. A confirmation study for the formation of spinel cubic MnFe2O4 ferrite ceramic and orthorhombic KNbO3 ferroelectric ceramic was performed by X ray diffraction. The strain in the composite for various compositions was estimated using W–H method to understand the variation of multiferroic features of the ceramic composites. The Transmission Electron Micrograph and High Resolution Transmission Electron Micrograph images reveal the existence of ferrite and ferroelectric phases. Weak magnetic behavior is exhibited by the ferrite-ferroelectric composites as compared to ferrite MnFe2O4. The 20:80 composite possesses the highest magnetic parameters among the compositions. The 40:60 composite recorded the maximum Pr and Ec values. The enhanced ME coupling between magnetic and ferroelectric phases is shown for 40:60 composite and the same is good for the lead free multifunctional device. All the composite samples show low current leakage.



The authors acknowledge sophisticated analytical instrumentation facilities, Indian Institute of Technology Madras for providing the facility of vibrating sample magnetometer. They thank sophisticated test and instrumentation centre, Cochin for extending the TEM and HRTEM characterization. The authors thank Dr. M. S. Ramachander Rao, Department of Physics, Indian Institute of Technology Madras for helping to characterize the electrical studies using Radiant Technology Pvt Ltd. This research work is supported by Department of science and Technology, India under project No: SR/WOS-A/PS-12/2014(G) and the authors are extremely thankful to DST for providing the financial support.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • P. Komalavalli
    • 1
    Email author
  • I. B. Shameem Banu
    • 1
  • M. Shahid Anwar
    • 2
  1. 1.Department of PhysicsB.S.Abdur Rahman Crescent Institute of Science and TechnologyVandalurIndia
  2. 2.Colloids and Materials Chemistry DepartmentCSIR Institute of Minerals and Materials TechnologyBhubaneswarIndia

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