J. Phys. Soc. Jpn. 69, pp. 3408-3413 (2000) [6 Pages]
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Received May 19, 2000
The magnetic and electrical properties are reported in the new solid solutions BaCo 1- x Cu x S 2 and BaNi 1- x Fe x S 2 . Both compounds show spin-glass-like behavior, although the type of spin frustrations is different with each other. BaCo 1- x Cu x S 2 shows a competition type spin-glass behavior with reentrant phenomenon from antiferromagnetic to spin-glass at low temperatures. BaNi 1- x Fe x S 2 shows a dilute type spin-glass behavior together with super-paramagnetic properties. The temperature variation of 57 Fe Mössbauer spectra in BaNi 0.8 Fe 0.2 S 2 is explicable in a framework of cluster-glass.
©2000 The Physical Society of Japan
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