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Phase transitions and magnetocaloric effect in MnAs, MnAs0.99P0.01, and MnAs0.98P0.02 single crystals

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Abstract

We have examined the influence of external magnetic fields up to H = 14 T on the phase transitions of MnAs, MnAs0.99P0.01, and MnAs0.98P0.02 single crystals. The results indicate that there is structural instability of the crystal lattice, associated with anomalous compression at temperatures from \(T_{f_1 }\) ≃ 250 K to the phase transition temperature T u and anomalous lattice expansion in the basal plane between T u and \(T_{f_2 }\) ≃ 350 K. Near the first-order phase transition, the magnetic entropy change at a magnetic field change from 0 to 14 T is about 40 J/(kg K) in single-crystal MnAs and approaches 50 J/(kg K) in single-crystal MnAs0.98P0.02.

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Authors and Affiliations

  1. Scientific-Practical Materials Research Centre, Belarussian Academy of Sciences, ul. Brovki 19, Minsk, 220072, Belarus

    V. I. Mitsiuk & G. A. Govor

  2. Institute of Physics, M. Curie-Sklodowska University, pl. M. Curie-Sklodowskiej 1, 20-031, Lublin, Poland

    M. Budzyński

Authors
  1. V. I. Mitsiuk
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  2. G. A. Govor
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  3. M. Budzyński
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Correspondence to V. I. Mitsiuk.

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Original Russian Text © V.I. Mitsiuk, G.A. Govor, M. Budzyn-ski, 2013, published in Neorganicheskie Materialy, 2013, Vol. 49, No. 1, pp. 17–21.

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Mitsiuk, V.I., Govor, G.A. & Budzyński, M. Phase transitions and magnetocaloric effect in MnAs, MnAs0.99P0.01, and MnAs0.98P0.02 single crystals. Inorg Mater 49, 14–17 (2013). https://doi.org/10.1134/S002016851301007X

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  • DOI: https://doi.org/10.1134/S002016851301007X

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