Phase Diagram of Spin Density Wave States in Dilute Cr–Ge Alloys

Abstract

The constitution of the phase diagram for the spin density wave states in dilute Cr–Ge alloys was investigated by means of thermal expansion measurement. The phase boundaries around the triple point among the paramagnetic (P), the commensurate (C) and the incommensurate (I) spin density wave (SDW) states were determined. The temperature of the triple point was assigned to 304 K and its composition to 0.32 at.% Ge. It was found that in a higher range of Ge content than the triple point, the ISDW state is more stable than the CSDW state at lower temperatures.