Mechanism behind magnetism-driven negative thermal expansion (NTE) explained for the first time in over 40 years

For the first time, a recent study led by Professor Masahito Mochizuki at Waseda University and graduate student Masaya Kobayashi from Aoyama Gakuin University was able to provide a theoretical explanation to the NTE phenomenon by examining NTE observed in inverse perovskite antiferromagnets Mn3AN (A = Zn, Ga, etc.). The theory could not only help scientists and developers understand the mechanism behind NTE, but also allow them to predict and identify possible candidate materials that would exhibit NTE—a crucial process in research and development.

This study was published in Physical Review Materials on February 21, 2019