Pre-martensitic state in Ni - Mn - Ga alloys

Abstract

The pre-martensitic anomalies observed by elastic, thermal and electron microscopy measurements in the group of Ni - Mn - Ga alloys with K have been attributed to the formation of the intermediate phase existing in the temperature range 30 - 60 K above the martensitic transformation temperature. The results are discussed in terms of the soft-mode condensation in this alloy system.