Abstract

Temperature dependency of the thermal expansion coefficient (TEC) was studied at 4.2– 300K in SmFe₂ ferromagnetic compound having spin-reorientation temperature near 190 K. We have found a strong effect of the magnetic texture on TEC of this high magnetostrictive compound at the spin-reorientation phase transition from [1 1] to [1 10] easy direction. The substantial role in the texture formation is expected to belong to atoms of hydrogen that are always present in a small amount in the compounds of such type.