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Influence of Induced Electrical Polarization on the Magnetoresistance and Magnetoimpedance in the Spin‐Disordered Tm x Mn 1− x S Solid Solution
Author(s) -
Aplesnin Sergey S.,
Sitnikov Maksim N.,
Kharkov Anton M.,
Masyugin Albert N.,
Kretinin Vasiliy V.,
Fisenko Olga B.,
Gorev Mikhail V.
Publication year - 2019
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201900043
Subject(s) - condensed matter physics , magnetoresistance , polaron , materials science , magnetization , atmospheric temperature range , debye model , solid solution , magnetic field , charge carrier , electron , physics , thermodynamics , quantum mechanics , metallurgy
The transport properties of the Tm x Mn 1– x S ( x ≤ 0.15) solid solutions in the temperature range of 200–600 K have been investigated. The temperatures of lattice polaron pinning accompanied by the lattice strain, condensation of the infrared modes, and thermionic emission have been determined. The change of the carrier sign with temperature has been found from the Hall coefficient data and dragging of electrons by phonons, from the thermopower data. The dependence of the magnetoresistance on the concentration, current, and voltage has been established from the I–V characteristics measured without field and in an applied magnetic field of H = 8 kOe in the temperature range of 300–500 K. The functional temperature dependence of the carrier relaxation time has been determined using the impedance data. The concentration region with the magnetoimpedance sign varying with frequency and temperature has been found. The increase in the relaxation time of the induced electric polarization with increasing concentration of thulium ions has been observed. The experimental data have been interpreted in the framework of the Debye and Maxwell–Wagner models, as well as the theoretical model for the Rashba spin–orbit interaction.