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Relaxation calorimetry technique for measuring low temperature specific heat

Summary: Relaxation calorimetry technique for measuring low temperature
specific heat
R. W. Newsome, Jr. and E. Y. Andreia)
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08855
Received 6 June 2003; accepted 15 October 2003
A rudimentary calorimeter was constructed to measure the temperature dependence of the specific
heat of a 10 thick 0.62 mg copolymer film of vinylidene fluoride and trifluoroethylene in the
previously unexplored vicinity of 6 K. The data were processed with the algorithm developed by
Hwang et al. Rev. Sci. Instrum. 68, 94 1997 as modified for our configuration in which a Cernox
thermometer also served as a heater. The measurements extended from 3.75 to 8.5 K, with a
temperature resolution of 0.2 K, and the ratios of the statistical uncertainties to the mean values
deduced for cp are 3% over most of this temperature range. The data taken with the intermediate
resolution of this calorimeter provides evidence for the absence of any slowly varying anomaly in
the temperature dependence of cp . Such rudimentary systems provide a useful option to gather
exploratory information at a comparatively low cost for components. 2004 American Institute
of Physics. DOI: 10.1063/1.1633989
Design improvements over recent years enable some
calorimeters to precisely measure the specific heat of very
small samples at low temperatures.17


Source: Andrei, Eva Y. - Department of Physics and Astronomy, Rutgers University


Collections: Materials Science; Physics