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Magnetic and mössbauer study of rare-earth-substituted M-, W- and X-type hexagonal ferrites

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Abstract

The effects of substitution of Ba2+ ions for some trivalent rare-earth ions on the magnetic properties and phase formation of M-, W- and X-type hexaferrites are studied. The compounds considered were: Ba1-REx/2Nax/2Fe12O19 with RE = gadolinium, lanthanum, lutetium, samarium and 0.0 ⩽x ⩽ 0.3; Ba0.9La0.05Na0.05Zn2Fe16O27 and Ba1.9La0.05Na0.05Zn2Fe28O46. The samples were prepared by standard ceramic procedures and have been investigated by thermomagnetic analysis, X-ray diffraction, Mössbauer spectroscopy, scanning electron microscope and magnetic measurements. Monophasic BaRE x/2-M compounds were found for 0.0⩽x<0.2 giving an indication of the solubility range of the rare-earth (RE) atoms in this phase. The intrinsic magnetic properties and the coercive field are lowered with the exception of the lanthanum-substituted hexaferrite. No significant differences in the phase formation and magnetic properties were observed for the W- and X-type hexaferrites.

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Authors and Affiliations

  1. MASPEC/CNR Institute, Via Chiavari 18/A, 43100, Parma, Italy

    F. Leccabue & R. Panizzieri

  2. Laboratory of Magnetism, IMRE, La Habana University, Cuba

    S. Garcia, N. Suarez, J. L. Sanchez & O. Ares

  3. Physics Department, Nanjing University, 210008, Nanjing, China

    Xue Rong Hua

Authors
  1. F. Leccabue
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  2. R. Panizzieri
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  3. S. Garcia
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  4. N. Suarez
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  5. J. L. Sanchez
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  6. O. Ares
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  7. Xue Rong Hua
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Leccabue, F., Panizzieri, R., Garcia, S. et al. Magnetic and mössbauer study of rare-earth-substituted M-, W- and X-type hexagonal ferrites. J Mater Sci 25, 2765–2770 (1990). https://doi.org/10.1007/BF00584876

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  • DOI: https://doi.org/10.1007/BF00584876

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