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Magnetic susceptibility of Bi2 − x Sb x Te3 (0 < x < 1) solid solution crystals in the range from 2 to 400 K

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Abstract

The magnetic susceptibility of single crystals of Bi2Te3-Sb2Te3 solid solutions containing 10, 25, and 50 mol % Sb2Te3 has been measured using a superconducting Josephson interferometer in the temperature range from 2 to 400 K at 3-K intervals in magnetic fields of up to 2.38 × 106 A/m at two orientations of the magnetic field H with respect to the trigonal axis C 3 of the crystals (H ‖ C 3 and H ⊥ C 3) with a relative uncertainty within 2%. A new approach has been proposed for separately assessing the contributions of the ionic core and free charge carriers to the magnetic susceptibility, which uses experimental data on magnetic susceptibility and effective mass anisotropy. Analysis of the data obtained in this study demonstrates that the temperature variation of carrier susceptibility in the region of degenerate and nondegenerate states of the electronic system can be described in terms of the Pauli and Landau-Peierls approaches if one takes into account the complex structure of the valence band and “nonparabolicity” of the light hole energy spectrum.

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Authors and Affiliations

  1. Transbaikalian State University, Aleksandro-Zavodskaya ul. 30, Chita, 672000, Russia

    N. P. Stepanov & V. Yu. Nalivkin

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  1. N. P. Stepanov
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  2. V. Yu. Nalivkin
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Correspondence to N. P. Stepanov.

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Original Russian Text © N.P. Stepanov, V.Yu. Nalivkin, 2015, published in Neorganicheskie Materialy, 2015, Vol. 51, No. 3, pp. 316–321.

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Stepanov, N.P., Nalivkin, V.Y. Magnetic susceptibility of Bi2 − x Sb x Te3 (0 < x < 1) solid solution crystals in the range from 2 to 400 K. Inorg Mater 51, 267–271 (2015). https://doi.org/10.1134/S0020168515030164

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  • DOI: https://doi.org/10.1134/S0020168515030164

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