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G. Hilscher, H. Michor, N. Baranov, P.E. Markin, A. A. Yermakov:
"Giant Enhancement of the T-Linear Specific Heat in R₃T";
Acta Physica Polonica B, 34 (2003), 1205 - 1208.

Giant Enhancement of the T-Linear Specific Heat in R3T
G. Hilscher, H. Michor, N.V. Baranov, P.E. Markin, A.A. Yermakov

Specific heat measurements of (Gd1-xYx)3T compounds (T= Co and Ni) revealed a strong concentration dependence of the coefficient \gamma of the T-linear specific heat. In particular, the electronic specific heat coefficient \gamma of Y3Co was found to be significantly lower (15 mJ/molK2) than that of isostructural Gd3Co (110 mJ/molK2) and (Gd0.2Y0.8)3Co (380 mJ/molK2). Such a behaviour can be attributed to the presence of a huge contribution of spin fluctuations in the d-electron subsystem induced by the f-d exchange interaction.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04405745

http://th-www.if.uj.edu.pl/acta/vol34/abs/v34p1205.htm