Magnetic properties of Lu2Fe16X (X=Fe, Ni, Cr, Si) intermetallics under high hydrostatic pressure

Abstract: We present very significant effects of a partial substitution of Ni, Cr and Si for Fe on magnetic and magnetoelastic properties of the mother Lu2Fe17 intermetallics. The ferromagnetic state is stabilized by the substitution in all the Lu2Fe16X (X=Ni, Cr, Si) intermetallics. Their Curie temperature T C is by about 100K higher than the Néel temperature T N of Lu2Fe17. The magnetoelastic phenomena of the Lu2Fe16X single crystals were studied under high hydrostatic pressure using a non-magnetic pressure CuBe cell in a SQUID magnetometer. The effect of pressure on T C of the Lu2Fe16X intermetallics coincides with changes of T C that are induced by hydrogenation in Lu2Fe17H x . Pressure induced changes of saturated magnetization M S of Lu2Fe16X depend on a kind of X-element and generally, they are several times smaller than those in Lu2Fe17. Magnetocrystalline anisotropy of Lu2Fe17 is strongly reduced by the substitution of Cr for Fe only. [Copyright &y& Elsevier]