Effect of pressure on transport properties of Ni(S 1- xSe x) 2
Abstract
Resistivity and Hall effect measurements were made on single crystals of NiS 2 and Ni(S 0.9Se 0.1) 2 under high pressure in a temperature range between 4.2 and 300 K. NiS 2 and Ni(S 0.9Se 0.1) 2 show insulator-metal transitions. Anomalous behavior of resistivity corresponding to a para-antiferromagnetic transition was found in the metallic phase. The Hall coefficient and the Hall mobility decrease with increasing pressure. It is suggested that the electronic structure of Ni(S 1- xSe x) 2 in the insulating phase is modified toward the phase boundary of the insulator-metal transition.
- Publication:
-
Physica B Condensed Matter
- Pub Date:
- July 1997
- DOI:
- 10.1016/S0921-4526(97)00078-1
- Bibcode:
- 1997PhyB..237..148S