Experimental search for universality of the specific heat in Ni-Cu ferromagnetic system. part I.

In these papers (Part I and Part 11) the results of a detailed experimental study of the specific heat near the Curie temperature are reported for the Ni-Cu ferromagnetic alloy system. The measuring technique and specimen preparation have allowed high enough resolution of specific heat for critical exponent analysis in the 0–10 weight per cent concentration range. A simple data analysis without higher corrections gives very unsatisfactory results in respect of symmetry (α = α′) and universal behaviour of specific heat. The problem of rounding and the regular background term to the specific heat is analyzed.