Investigation of Site Occupation in Non-Stoichiometric Ni-Zr Substituted Barium Hexaferrites

  1. Prof. T. W. Clyne and
  2. F. Simancik
  1. Manisha V. Rane1,
  2. D. Bahadur2,
  3. A. K Nigam3 and
  4. C. M Srivastava4

Published Online: 21 DEC 2005

DOI: 10.1002/3527606203.ch6

Metal Matrix Composites and Metallic Foams, Volume 5

Metal Matrix Composites and Metallic Foams, Volume 5

How to Cite

Rane, M. V., Bahadur, D., Nigam, A. K. and Srivastava, C. M. (2000) Investigation of Site Occupation in Non-Stoichiometric Ni-Zr Substituted Barium Hexaferrites, in Metal Matrix Composites and Metallic Foams, Volume 5 (eds T. W. Clyne and F. Simancik), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606203.ch6

Editor Information

  1. Department of Materials Science and Metallurgy, Cambridge University, Pembroke Street, Cambridge CB2 3QZ, U.K.

Author Information

  1. 1

    1IWV-2, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany

  2. 2

    Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay 400076, India

  3. 3

    Tata Institute of Fundamental Research, Mumbai 400001, India

  4. 4

    Department of Physics, Indian Institute of Technology, Bombay 400076, India

Publication History

  1. Published Online: 21 DEC 2005
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301263

Online ISBN: 9783527606207

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Keywords:

  • non-stoichiometric Ni-Zr substituted barium hexaferrites;
  • site occupation

Summary

Ni-Zr substituted non-stoichiometric barium ferrite BaFe12–2xNi0.63xZr0.50xO19–δ(0 = × = 0.5) synthesized by citrate gel route have excellent magnetic and microstructural properties. Single phase formation at as low temperature as 700 °C is attributed to non-stoichiometry. These compounds have often higher saturation magnetization σs, Curie temperature Tc and anisotropy constant K1 but lower coercive force, Hc compared to their stoichiometric counterpart. This is difficult to understand. The anisotropy field and hence K1 estimated through FMR measurements does not show a significant reduction with x, though the Hc drops significantly. The reason for this is investigated in this paper.