Conductivity, weak ferromagnetism, and charge instability in an αMnS single crystal

S. S. Aplesnin, L. I. Ryabinkina, G. M. Abramova, O. B. Romanova, A. M. Vorotynov, D. A. Velikanov, N. I. Kiselev, and A. D. Balaev
Phys. Rev. B 71, 125204 – Published 15 March 2005

Abstract

The temperature dependence of resistivity, magnetization, and electron-spin resonance of the αMnS single crystal were measured in temperature range of 5K<T<550K. Magnetization hysteresis in an applied magnetic field up to 0.7T at T=5, 77, and 300K, irreversible temperature behavior of magnetization, and resistivity were found. The obtained data were explained in terms of a degenerate tight binding model using random phase approximation. The contribution of holes in t2g and eg bands of manganese ions to the conductivity, optical absorbtion spectra, and charge instability in αMnS were studied. Charge susceptibility maxima resulted from the competition of the on-site Coulomb interaction between the holes in different orbitals and small hybridization of subbands were calculated at T=160, 250, and 475K.

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  • Received 16 April 2004

DOI:https://doi.org/10.1103/PhysRevB.71.125204

©2005 American Physical Society

Authors & Affiliations

S. S. Aplesnin*, L. I. Ryabinkina, G. M. Abramova, O. B. Romanova, A. M. Vorotynov, D. A. Velikanov, N. I. Kiselev, and A. D. Balaev

  • Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036, Russia

  • *Electronic address: apl@iph.krasn.ru

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Vol. 71, Iss. 12 — 15 March 2005

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