Hydrogen Absorption of LaFe10.9Co0.8Si1.3 Compound under Low Hydrogen Gas Pressure

The effects of hydrogen absorption on structure, Curie temperature and phase transition property for the LaFe10.9Co0.8Si1.3 compound are investigated by X-ray diffraction (XRD) and differential scanning calorimeter (DSC) in a 1-atm H2 gas. The original compound and hydride present cubic NaZn13-type structure. The Curie temperature of LaFe10.9Co0.8Si1.3 shifts from 277K to 346K and temperature range of the phase transition becomes wider significantly after hydrogen absorption.