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Mössbauer studies of the magnetic phase transition in La(Fe0.88Si x Al0.12 − x )13 compounds

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Abstract

Spectra of the nuclear gamma resonance for La(Fe0.88Si x Al0.12 − x )13 compounds with different x values have been measured at 100 K. The compounds exhibit an antiferromagnetic ordering in the range of silicon concentrations x ≤ 0.024 and a ferromagnetic ordering at x > 0.024. Analysis of the spectra has been carried out with the use of a two-core distribution of quadrupole shifts. It has been demonstrated that upon a transition from antiferromagnetic to ferromagnetic ordering, the average hyperfine field at the Fe nuclei increases by almost 40 kOe. It has been found that antiferromagnetic compounds are mainly characterized by a positive quadrupole shift, and ferromagnetic ones by a negative quadrupole shift. A model of the formation of a magnetic structure that explains the appearance of a layered antiferromagnetic ordering in La(Fe0.88Si x Al0.12 − x )13 compounds has been proposed.

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Authors and Affiliations

  1. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, Ekaterinburg, 620990, Russia

    V. V. Serikov, N. M. Kleinerman, A. V. Vershinin & N. V. Mushnikov

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  1. V. V. Serikov
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  2. N. M. Kleinerman
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  3. A. V. Vershinin
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  4. N. V. Mushnikov
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Original Russian Text © V.V. Serikov, N.M. Kleinerman, A.V. Vershinin, N.V. Mushnikov, 2012, published in Fizika Metallov i Metallovedenie, 2012, Vol. 113, No. 9, pp. 901–907.

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Serikov, V.V., Kleinerman, N.M., Vershinin, A.V. et al. Mössbauer studies of the magnetic phase transition in La(Fe0.88Si x Al0.12 − x )13 compounds. Phys. Metals Metallogr. 113, 855–861 (2012). https://doi.org/10.1134/S0031918X12090098

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  • DOI: https://doi.org/10.1134/S0031918X12090098

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