ELECTRICAL BEHAVIOR OF A Cu2Fe0.4Co0.6SnS4 CERAMIC

Abstract

The solid solutions Cu 2 Fe 1-X Co X SnS 4 , with stannite-type structure are stable up to about 800ºC. The electrical properties of the Cu 2 Fe 0.4 Co 0.6 SnS 4 ceramic were investigated by complex impedance. The real and imaginary dielectric permittivity dependence with the temperature were measured between 10kHz and 1 MHz in temperature range 77-280K, finding that the ceramic present the characteristics behavior of a dielectric relaxation between 100 and 250 K, with a maximum at approximately 200 K. The electric permittivity found has orders of magnitude between 10 2 and 10 3 . A space charge polarization mechanism is suggested to explain the observed electric relaxation.