Dzevenko M. Interaction in Er-{Mn, Fe, Co, Ni}-In systems (phase equilibria, crystal structure and physical properties of compounds).

The isothermal section of Er-{Mn, Fe, Co, Ni}-In phase diagram were constructed based on X-ray phase, particularly microstructure and EDX- analyses over the whole concentration range at 870 K. The existence of 28 new ternary compounds was found in these and related systems. The crystal structures of 19 compounds were determined. Er12Fe2In3 crystallizes in a new structure type. The existence of solid solutions based on ErCo3, ErNi2, NiIn binary compounds was found in Er-{Co, Ni}-In ternary systems. The magnetic susceptibility of ErNi2, Er0.9Ni2In0.1 (MgCu2 str.type), ErNi4In (MgCu4Sn str. type), Er0,04NiIn (solid solution based on NiIn binary compound, CoSn str. type) and ErMn1,84In0,16 (MgCu2 str. type) phases was studied. It was determined, that all these compounds are Curie-Weiss paramagnetic in temperature range 2 - 450 K. Also, magnetic and transport properties of R(Mn,In)2 (R = Y, La, Ce, Tb - Tm, Lu; AlB2 str. type) were investigated. It was determined, that compound with Y characterized by antiferromagnetic order. The compounds with La, Ce, Tb are ferromagnetic and characterized by spin glass behaviour. For compounds with Dy, Ho, Er and Tm we observed Curie-Weiss behaviour. The relationship between Sm12Ni6In, Ho6Co2Ga and Er12Fe2In3 structures was determined. These structures form homological series, general formula of which is R3(x+y)M2xXy, (R - rare earth, M - transition metal, X - p-metal, and x - quantity of fragment with R3M2 composition, y - quantity of fragment with R3X composition).