Magnetic and electrical properties in BaNiS2-type solid solutions

The magnetic and electrical properties are reported in the new solid soluti ons BaCo1-xCuxS2 and BaNi1-xFexS2. Both compounds show spin-glass-like beha vior, although the type of spin frustrations is different with each other. BaCo1-xCuxS2 shows a competition type spin-glass behavior with reentrant ph enomenon from antiferromagnetic to spin-glass at low temperatures. BaNi1-xF exS2 shows a dilute type spin-glass behavior together with super-paramagnet ic properties. The temperature variation ol Fe-57 Mossbauer spectra in BaNi 0.8Fe0.2S2 is explicable in a framework of cluster-glass.