LOW-TEMPERATURE METAL-INSUSLATOR TRANSITION AND MAGNETIC-PROPERTIES IN THE VXMN1-XS DISORDERED SYSTEM

A study of the structure and electrical and magnetic properties of the VxMn1-xS disordered system is reported. The existence of a low-temper ature metal-insulator transition for Fermi-glass 0.4<x<0.5 composition s in paramagnetic phase, which is accompanied by a change in the struc ture and magnetic properties, has been established. An analysis of the magnetic properties permits a conjecture that current carriers become delocalized in these solid solutions at the metal-insulator transitio n temperature to form small ferromagnetically ordered regions (ferrons ). (C) 1997 American Institute of Physics.