F. Luis et al., A CALORIMETRIC STUDY OF THE R(2)FE(14)X (X=B, C) SERIES AT THE CURIE-TEMPERATURE, Journal of magnetism and magnetic materials, 144, 1995, pp. 1045-1046
We present an extensive heat capacity investigation on the R(2)Fe(14)X
(R = rare earth; X = B, C) series near the magnetic ordering transiti
on. The experimental results for Y2Fe14B agree well with a simplified
theory of spin fluctuations. In compounds with magnetic R the anomalou
s entropy follows the trend of the de Gennes factor. An interpretation
is given using a mean field model for the R-Fe exchange interaction.