Anomalous Anisotropic Magnetoresistance And Magnetization In Mn3.69Bi95.69Fe0.62

  • A. V. Terekhov B.I. Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine 47 Nauky ave., 61103 Kharkov, UkraineW. Trzebiatowski Institute for Low Temperatures & Structure Research PAS2 Okolna str., Wroclaw, Box 1410, 50-950, Poland https://orcid.org/0000-0002-1186-2314
  • A. L. Solovjov B.I. Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine 47 Nauky ave., 61103 Kharkov, UkraineW. Trzebiatowski Institute for Low Temperatures & Structure Research PAS2 Okolna str., Wroclaw, Box 1410, 50-950, Polan https://orcid.org/0000-0001-8858-1177
  • A. I. Prokhvatilov B.I. Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine47 Nauky ave., 61103 Kharkov, Ukraine https://orcid.org/0000-0003-3785-8994
  • V. V. Meleshko B.I. Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine47 Nauky ave., 61103 Kharkov, Ukraine https://orcid.org/0000-0002-9421-4725
  • I. V. Zolochevskii B.I. Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine47 Nauky ave., 61103 Kharkov, Ukraine https://orcid.org/0000-0003-4649-2031
  • J. Cwik W. Trzebiatowski Institute for Low Temperatures & Structure Research PAS2 Okolna str., Wroclaw, Box 1410, 50-950, Poland
  • A. Los W. Trzebiatowski Institute for Low Temperatures & Structure Research PAS2 Okolna str., Wroclaw, Box 1410, 50-950, Poland
  • A. D. Shevchenko G.V. Kurdyumov Institute for Metal Physics of National Academy of Sciences of Ukraine36 Academician Vernadsky Blvd, Kyiv, UA-03142, Ukraine
  • O. M. Ivasishin G.V. Kurdyumov Institute for Metal Physics of National Academy of Sciences of Ukraine,36 Academician Vernadsky Blvd, Kyiv, UA-03142, Ukraine
  • Z. D. Kovalyuk I.M. Frantsevich Institute for Problems of Materials Science. Chernivtsi Branch of National Academy of Sciences of Ukraine,5 I. Vil’dy str., Chernivtsi, 58001, Ukraine
Keywords: huge anisotropic magnetoresistance, reorientation transition, electron and hole Fermi surfaces, MnBi alloys, crystalline texture, bismuth

Abstract

It was found that the Mn3.69Bi95.69Fe0.62 consists of two phases, namely of a bismuth matrix and BiMn inclusions. It is shown that the samples have a crystalline texture. Independently on the applied field orientation, maximum on the temperature dependence of magnetization is detected at Tmax ≈ 85 K, which is associated with the reorientation transition of the magnetic moments of Mn for αBiMn phase. In turn, the electrical resistivity ρ(T) also demonstrates maximum at Tmax ≈58 K in a magnetic field of 800 kA/m when HI. It is established that the maximum of ρ(T) increases and is shifted toward higher temperature Tmax≈94 K when field increasing up to 2400 kA/m. At the same time no clear maximum on ρ(T) is observed for H||I. It is shown that the relative magnetoresistance, Δρ/ρ0, is increased both with decreasing temperature and with increase of the magnetic field. The measured enhancement reaches Δρ/ρ0≈250% for H||and Δρ/ρ0≈2400% for HI in magnetic field of 2400 kA/m. Thus, the strong anisotropy of ρ(T) and Δρ/ρ0(T) is established both for HI and H||I. Possible explanation of observed anomalous behavior of the temperature dependences of the electrical resistivity in magnetic fields has been proposed.

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Published
2017-12-15
How to Cite
Terekhov, A., Solovjov, A., Prokhvatilov, A., Meleshko, V., Zolochevskii, I., Cwik, J., Los, A., Shevchenko, A., Ivasishin, O., & Kovalyuk, Z. (2017). Anomalous Anisotropic Magnetoresistance And Magnetization In Mn3.69Bi95.69Fe0.62. East European Journal of Physics, 4(4), 12-17. https://doi.org/10.26565/2312-4334-2017-4-02