On the magnetic behaviour of ACo2 (A = Y, Lu, Zr, Sc and Hf) compounds

摘要: Abstract The magnetic properties of ACo2 (A = Y, Lu, Zr, Sc, Hf) compounds were investigated in the temperature range 2–1100 K and fields up to 70 kOe. In order avoid a possible alteration susceptibilities, χ, caused by presence ordered impurities, χ values obtained from magnetization isotherms, extrapolation H-1→0. At high temperatures, Sc show dependences susceptibilities Curie-Weiss type. ZrCo2, more complex thermal variation susceptibility is evidenced. T ⪅ 15 K, for YCo2 LuCo2 vary according relation χ0(1 + aT2). experimental data are analysed spin fluctuations model.