Magnetic and Electrical Properties in BaNiS₂-Type Solid Solutions

Abstract

The magnetic and electrical properties are reported in the new solid solutions BaCo_1-xCu_xS₂ and BaNi_1-xFe_xS₂. Both compounds show spin-glass-like behavior, although the type of spin frustrations is different with each other. BaCo_1-xCu_xS₂ shows a competition type spin-glass behavior with reentrant phenomenon from antiferromagnetic to spin-glass at low temperatures. BaNi_1-xFe_xS₂ shows a dilute type spin-glass behavior together with super-paramagnetic properties. The temperature variation of ⁵⁷Fe Mössbauer spectra in BaNi_0.8Fe_0.2S₂ is explicable in a framework of cluster-glass.