Pressure-tuned magnetocaloric effect in Mn0.93Cr 0.07CoGe

Abstract

Effects of physical and chemical pressures in the Mn1-xCr xCoGe series of compounds are studied. Cr substitution and hydrostatic pressure play similar roles in displacing TC to lower temperatures and coupling or decoupling magnetic and crystallographic transitions. In this work the similarities and differences between the effects of chemical and physical pressures are explored, helping unveil the nature of the first-order phase transition presented by MnCoGe-based compounds. © 2011 American Physical Society.