Regular Article

Sn replacement influence on magnetic, electronic, thermodynamic, thermoelectric and transport properties in shandite compounds of Co₃In_2−xSn_xS₂

¹ LB-GME, High Normal School, Hassan II University of Casablanca, BP 5366, Mâarif, Casablanca, Morocco
² LPMMAT, Faculty of Sciences – Ain Chock, Hassan II University of Casablanca, BP 5366, Mâarif, Casablanca, Morocco
³ Laboratory of Physico-chemical Studies, University of Saida, Saida, Algeria

^a e-mail: bophysiq@gmail.com

Received: 16 May 2020
Received in final form: 8 August 2020
Accepted: 17 August 2020
Published online: 16 September 2020

Abstract

In this paper, we have investigated some physical properties of Co₃In_2−xSn_xS₂ (x = 0, 1, and 2) compounds. The doping in Co₃In₂S₂, through chemical substitution of indium by tin as a low-cost neighboring element, affects their structural, electronic, magnetic, thermodynamic, and thermoelectric properties. The density functional theory (DFT) calculations show that indium substitution leads to a transition from weak-ferromagnetic metal (x = 0), to nonmagnetic semiconductor with low band gap energy at x = 1, and to a ferromagnetic half-metal at x = 2. The thermal properties, obtained by using the Gibbs code, were evaluated with temperature at various pressures from 0 to 20 GPa. The results demonstrated that chemical substitution in the studied materials affects their physical properties leading to an interest candidate for thermoelectric uses at ambient or at low temperature.