Abstract:
Neutron diffraction studies as a function of temperature on solid solutions of MnSe and MitTe in the Se rich region are presented. As Te is doped in MnSe, the structural phase transition wherein some portion of the sample converts to antiferromagnetic NiAs phase disappears completely and reappears in MnSe(0.5)Te(0.5) at room temperature. In this compound the room temperature phase is a mixture of both cubic and hexagonal phases in a ratio of 90:10. The magnetic ordering temperature of the cubic phase decreases with increasing Te content, while that of the hexagonal phase remains constant.
