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Nanocrystalline Sm-Fe Based Alloys: Structural and Magnetic Properties

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TMS 2015 144th Annual Meeting & Exhibition

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Abstract

Structure and magnetic properties of nanocrystalline P6/mmm Sm(Fe,M)17C(M=Ga,Si) are presented. Their structure is explained with a model ground on the Sm1-s(Fe,M)5+2s formula (s = vacancy rate) where s Sm atoms are statistically substituted by s transition metal pairs. The interpretation of the Mssbauer spectra is based on the correlation between the isomer shift (δ) and the Wigner-Seitz Cell volumes, calculated from the structural parameters. The δ behaviour of each crystallographic site versus Ga/Si content, defines the Ga/Si. The maximum coercivity is obtained for low Ga/Si content for auto-coherent diffraction domain size ≃ 30 nm. This controlled microstructure might lead to hard permanent magnet materials.

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Authors and Affiliations

  1. CMTR, ICMPE, UMR7182, CNRS-UPEC, 2 rue Henri Dunant, F-94320, Thiais, France

    L. Bessais, K. Zehani & J. Moscovici

  2. LMOP, Department of Physics, Faculty of Science of Tunis, Tunis El Manar University, Tunisia

    N. Mliki

Authors
  1. L. Bessais
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  2. K. Zehani
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  3. J. Moscovici
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  4. N. Mliki
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© 2015 TMS (The Minerals, Metals & Materials Society)

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Bessais, L., Zehani, K., Moscovici, J., Mliki, N. (2015). Nanocrystalline Sm-Fe Based Alloys: Structural and Magnetic Properties. In: TMS 2015 144th Annual Meeting & Exhibition. Springer, Cham. https://doi.org/10.1007/978-3-319-48127-2_40

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