Anomalous field-induced magnetic transitions in V5X8 (X = S, Se)

The magnetization of V5S8 and V5Se8 was measured in pulsed high magnetic fi elds up to 39 T. The anomalies were observed in the magnetization curves fo r both V5S8 and V5Se8. For V5S8, the anomaly at lower field is thought to c orrespond to spin flopping, The magnetization curves exhibited saturation f or both compounds and the values of the ordered moments for V5S8 and V5Se8 were estimated to be 1.5 and 1.2 mu (B)/V-1 from the saturation moments. re spectively. Our results support the magnetic structure of V5S8 proposed by neutron diffraction measurements. (C) 2000 Elsevier Science B.V. All rights reserved.