The specific heat capacity and thermal conductivity of normal liquid /sup 3/He

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00681541· OSTI ID:6902171

Mitchell, R; Eastop, A D; Faraj, E; Hook, J R

By observing the diffusion of a heat pulse along a 10-cm column of normal liquid /sup 3/He with the aid of two vibrating wire thermometers, it has been possible to measure the heat capacity C and thermal conductivity K of the liquid in the temperature range from T /sub c/ to 10 mK and at pressures of 0.21, 4.39, 9.97, 20.01, and 29.32 bar. By using a Pt NMR thermometer, an LCMN thermometer, and a /sup 3/He melting curve thermometer calibrated using the melting curve given by Greywall in 1983, a temperature scale has been established and (1) it has been shown that this melting curve is consistent in the temperature range 5-22 mK with the Korringa law for the Pt thermometer with a Korringa constant of 29.8 +/- 0.2 sec mK, (2) departures have been observed from the Curie-Weiss law for LCMN at low temperatures, and (3) values of the superfluid transition temperature have been obtained that are about 4% lower than the Helsinki values. The measured heat capacities agree well with those of Greywall, but values of KT are higher than those of Greywall and show more temperature dependence below 10mK. The implications for the present results of the very different melting curve given by Greywall in 1985 are discussed in an Appendix.

• Research Organization: Manchester Univ., Manchester
• OSTI ID: 6902171
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 64:1/2; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CURIE-WEISS LAW
DESIGN
EVEN-ODD NUCLEI
HELIUM 3
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MEASURING INSTRUMENTS
MELTING
NUCLEAR MAGNETIC RESONANCE
NUCLEI
PERFORMANCE
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RESONANCE
SPECIFIC HEAT
STABLE ISOTOPES
SUPERFLUIDITY
TEMPERATURE MEASUREMENT
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
THERMOMETERS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE