Mössbauer Effect Study of Metal-Insulator Transition inV2O3

Abstract

Comparison of the Mössbauer isomer shift of dilute ${}_{}{}^{57}{}_{}{}^{}\mathrm{Fe}$ in ${\mathrm{V}}_2$ ${\mathrm{O}}_3$ with that obtained in chromium-doped insulating ${\mathrm{V}}_2$ ${\mathrm{O}}_3$ shows that the high-temperature anomaly represents a gradual return from the metallic to the insulating state. The implications of this conclusion on the interpretation of the thermal expansion, susceptibility, and transport properties are pointed out.