https://doi.org/10.1140/epjb/e20020108
Low-temperature specific heat of Sr2RuO4
1
Max-Planck-Institut für Chemische Physik fester Stoffe, 01187 Dresden, Germany
2
Johann Wolfgang Goethe-University, 60054 Frankfurt, Germany
3
Institute for Materials Research, Tohoku University, Sendai, Japan
Corresponding author: a langhamm@cpfs.mpg.de
Received:
23
August
2001
Published online: 15 April 2002
We report low-temperature measurements 
K of the specific heat, C, of
the perovskite superconductor Sr2RuO4. Based on a detailed analysis of our data
with respect to both sample quality (as measured by 
K) and
magnetic-field dependence, it is shown that the electronic contribution to the specific
heat, which contains the desired information on the gap structure, is superimposed
by at least two additional contributions: a Schottky-type hump at 
K and a
low-temperature upturn in C/T at T < 0.1 K. We discuss possible origins of these
additional contributions and their implications for the interpretation of low-temperature
C(T) data.
PACS: 74.70.Pq – Ruthenates / 74.25.Bt – Thermodynamic properties
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
