THE EFFECT OF A STRONG ELECTRIC-FIELD ON THE CONDUCTIVITY OF A MNGAINS4 EU SINGLE-CRYSTAL

This paper presents the results of a study of the effect of a strong e lectric field on the electrical properties of MnGaInS4 : Eu single cry stals. The compound was obtained by the Bridgman method and consists o f plane-parallel layered plates. The following parameters are determin ed on the basis of these studies : concentration of trap levels 10(13) -10(14) cm(-3) and activation energy 0.70-0.50 eV. It is established t hat the conductivity of MnGaInS4 : Eu increases in strong electric fie lds mainly because the current-carrier concentration increases with el ectric field. (C) 1998 American Institute of Physics. [S1063-7826(98)0 1406-9].