Abstract
Magnetization σ, susceptibility χ and electrical resistivity ρ are investigated on (Cr 1- x Ti x ) 5 S 6 ( x ≤0.60). As x increases, T t (the transition temperature between the helico-canted antiferromagnetic and the collinear ferrimagnetic states) decreases more steeply than as the Curie temperature T c . The ferrimagnetic magnetization decreases up to a compensation concentration at x ≃0.30. It increases as x further increases; a revived ferrimagnetic state (RFS) appears. The Curie temperature T f for RFS decreases with x . Immediately below RFS, a reentrant spin-glass like state is found over the very wide range of x , which shows an anomaly in ρ. This state exhibits a spontaneous magnetization in a narrow range of x . One discusses these features on the view point of the mean field and the local atomic situations, by using the exchange parameters evaluated from the paramagnetic χ through the Néel law.
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