Giant Volume Magnetostriction Caused by Itinerant Electron Metamagnetic Transition and Pronounced Invar Effects in La (Fe_xSi_1-x)_13 Compounds

摘要

A first-order itinerant electron metamagnetic (IEM) transition above the curie temperature TC for ferromagnetic La (Fe_xSi_1-x)_13 compounds has been confirmed by applying magnetic field. The volume change just above T_c for x=0.88 is huge of about 1.5/100, which is caused by a Large magnetic moment induced by the IEM transition. These compounds have a possibility for Practical applications as giant magnetostrictive materials.