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Magnetic phase diagram of the FexMn0.7-xAl0.3 alloys series obtained by Mössbauer spectroscopy

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Abstract

By Mössbauer spectroscopy the magnetic phase diagram of the FexMn0.7-xAl0.3 spin glass alloy has been obtained. X-ray diffraction (XRD) has shown that all the alloys are in the BCC phase. The broad spectral lines observed in the Mössbauer spectra are indicative of the disordered character of these alloys. Depending on the composition and the temperature the alloys behave as paramagnetic (P), ferromagnetic (F) and reentrant spin glass (RSG). For the alloys rich in iron the only detected magnetic transition is from F to P. For medium iron content two transitions were observed, namely from RSG to F and from F to P. The RSG phase is obtained as a consequence of the disordered character of the alloys and the competitive exchanges due to iron and manganese atoms.

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Authors and Affiliations

  1. Departamento de Física, Universidad del Valle, A.A. 25360, Cali, Colombia

    Ligia E. Zamora, G.A. Pérez Alcázar & A. Bohórquez

  2. Instituto de Química Física Rocasolano-CSIC, c/serrano 119, E-28006, Madrid, Spain

    J.F. Marco

Authors
  1. Ligia E. Zamora
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  2. G.A. Pérez Alcázar
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  3. A. Bohórquez
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  4. J.F. Marco
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Zamora, L.E., Pérez Alcázar, G., Bohórquez, A. et al. Magnetic phase diagram of the FexMn0.7-xAl0.3 alloys series obtained by Mössbauer spectroscopy. Hyperfine Interactions 110, 177–182 (1997). https://doi.org/10.1023/A:1012658912752

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  • DOI: https://doi.org/10.1023/A:1012658912752

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