Magnetism in hydrogen-doped U2T2X compounds

U2T2X compounds (Mo2FeB2 structure type, T-transition metal, X-p-element), exhibiting wide range of magnetic properties from weak paramagnetism to 5f-antiferromagnetism, have been checked for hydrogen absorption properties. Besides U2Co2Sn hydrides, which have been reported already, U2Ni2SnH1.8, U2Ni2InH1.9, and U2Co2InH1.9, have been synthesized. Hydrogenation leads to the enhancement of magnetic interaction for all compounds. U2Ni2SnH1.8 and U2Ni2InH1.9 order antiferromagnetically similar to the initial compounds, and the Neel temperature increases from 26 to 87K and from 15 to 60K, respectively.