Low Temperature Physics: 41, 154 (2015); https://doi.org/10.1063/1.4908606
Fizika Nizkikh Temperatur: Volume 41, Number 2 (February 2015), p. 202-206    ( to contents , go back )

Contribution of spin ordering of impurity electron states of iron, cobalt and nickel to low-temperature magnetic susceptibility of mercury selenide crystals

T.E. Govorkova1, A.T. Lonchakov1, V.I. Okulov1, M.D. Andriichuk2, A.F. Gubkin1, and L.D. Paranchich2

1Institute of Metal Physics , S. Kovalevskoyi st. 18, Ekaterinburg 620137, Russia
E-mail: okulov@imp.uran.ru

2Yuriy Fed’kovych Chernivtsi National University, Kotsiubynskogo Str.2, Chernivtsi 58012, Ukraine
pos Анотація:

Received December 1, 2014

Abstract

Magnetic susceptibility of electron systems of hybridized impurity states of iron, cobalt and nickel has been analyzed in mercury selenide crystals at low temperatures with allowance for the evidences of spontaneous spin polarization of these systems revealed by us recently at room temperature. It is shown that measured paramagnetic susceptibility of the electron hybridized states involves a temperature-independent part which can be identified with the contribution of spontaneous spin polarization. The other part, showing the Curie law with decreasing temperature, corresponds to the nonpolarized electron contribution. Based on these concepts we determined a fraction of spontaneously polarized electron density in the localized component of the hybridized states in the magnetization of the impurity systems considered. Quantitative estimations of the above-mentioned contributions are quoted for each impurity.

PACS: 72.80.Ey III–V and II–VI semiconductors;
PACS: 72.25.Dc Spin polarized transport in semiconductors.

Key words: transition element impurities in semiconductors, hybridized electron states, low-temperature magnetic susceptibility, spontaneous magnetization.

Published online: December 22, 2014

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