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Galvanomagnetic properties of Heusler alloy Co2 YAl (Y = Ti, V, Cr, Mn, Fe, and Ni)

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Abstract

The Hall effect and the magnetoresistance of ferromagnetic Heusler alloys Co2 YAl, where Y = Ti, V, Cr, Mn, Fe, and Ni have been studied at T = 4.2 K in magnetic fields H ≤ 100 kOe. Normal R 0 and anomalous R S Hall coefficients are shown to be maximal in magnitudes in the middle of the 3d period of the periodic table of elements. Coefficient R 0 changes the negative sign to positive sign in going from weak (Y = Ti, V) to strong (Y = Cr, Mn, Fe, and Ni) ferromagnetic alloys. Constant R S is positive and proportional to ρ2.9 in all the alloys. The magnetoresistance of the alloys is not higher than several percent and its magnitude is changed fairly significantly in the dependence on the number of valence electrons z; the magnetoresistance signs vary arbitrarily.

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Authors and Affiliations

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

    N. I. Kourov, V. V. Marchenkov & Yu. A. Perevozchikova

  2. Ural Federal University, ul. Mira 19, Yekaterinburg, 620002, Russia

    V. V. Marchenkov

  3. International Laboratory of High Magnetic Fields and Low Temperatures, Wroclaw, Poland

    V. V. Marchenkov

  4. Atominstitut, Vienna University of Technology, Vienna, Austria

    H. W. Weber

Authors
  1. N. I. Kourov
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  2. V. V. Marchenkov
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  3. Yu. A. Perevozchikova
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  4. H. W. Weber
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Correspondence to N. I. Kourov.

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Original Russian Text © N.I. Kourov, V.V. Marchenkov, Yu.A. Perevozchikova, H.W. Weber, 2017, published in Fizika Tverdogo Tela, 2017, Vol. 59, No. 1, pp. 63–69.

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Kourov, N.I., Marchenkov, V.V., Perevozchikova, Y.A. et al. Galvanomagnetic properties of Heusler alloy Co2 YAl (Y = Ti, V, Cr, Mn, Fe, and Ni). Phys. Solid State 59, 63–69 (2017). https://doi.org/10.1134/S1063783417010188

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  • DOI: https://doi.org/10.1134/S1063783417010188

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