Abstract

The frequency and temperature dependences of the ac electrical conductivity of the MnGaInSe4 single crystals have been investigated. It has been established that, in the temperature range of 295.5–360 K at frequencies of 2 × 104–106 Hz, the electrical conductivity obeys the regularity σ ~ fS(0.1 ≤ S ≤ 1.0). It is shown that the frequency dependence of the electrical conductivity for the MnGaInSe4 single crystal can be explained using a multiplet model and the conductivity in these single crystals is implemented via the band-hopping mechanism. The activation energies have been determined on the basis of dependences logσ ~ 103/T.

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