|   | 
Details
   web
Records
Author (up) Cotignola, J.M.; de la Cruz, F.; de la Cruz, M.E.; Platzeck, R.P.
Title Thermal Conductivity of Polycrystalline Zinc below 1 K Type Journal Article
Year 1967 Publication Review of Scientific Instruments Abbreviated Journal
Volume 38 Issue 1 Pages 87-92
Keywords
Abstract Measurements of the thermal conductivity of samples of polycrystalline zinc of thickness 0.1 mm have been carried out between 0.12 and 0.9°K in the normal as well as in the superconducting state to investigate the usefulness of zinc as a thermal switch. The conductivity in the normal state shows a linear dependence on temperature. In the superconducting state it shows a behavior typical of electronic conductivity down to the lowest temperature measured. By applying a magnetic field between 40 and 5000 Oe, magnetoresistivity was also investigated and a strong dependence of thermal conductivity on field was found. Electrical resistivity measurements were performed in magnetic fields at liquid 4He temperatures. The resistivity was found to be independent of temperature for fields up to 9000 Oe. The effect of solder joints using Cd, Sn, In, Zn, and Wood's metal was also investigated, Cd giving the least resistance. The measurements show that zinc should be a useful thermal switch for temperatures below 0.1 and 0.2°K, though effect of a magnetic field on the normal conductivity must be carefully considered.
Address Centro Atómico Bariloche – Instituto Balseiro
Corporate Author Thesis
Publisher AIP Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ cotignola:87 Serial 533
Permanent link to this record
 

 
Author (up) Mota, A.C.; Platzeck, R.P.; Rapp, R.; Wheatley, J.C.
Title Experimental Heat Capacity of Pure Liquid He3 Type Journal Article
Year 1969 Publication Physical Review Abbreviated Journal Phys. Rev.
Volume 177 Issue 1 Pages 266-271
Keywords
Abstract Measurements of the heat capacity of pure He3 at 0.24 atm obtained by a differencing method are presented for the temperature range from 20-150 m°K. The temperature scale T* used is that valid for powdered cerium magnesium nitrate in the form of a right circular cylinder with diameter equal to height. There is excellent agreement between the present and earlier measurements. Considering all low-pressure difference data we find that from 6-125 m°K the ratio of heat capacity to magnetic temperature decreases linearly with increasing temperature. The relationship of the measurements to the temperature scale and to theories of spin fluctuations in He3 is also discussed.
Address
Corporate Author Thesis
Publisher American Physical Society Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ pedrazp @ 10.1103/PhysRev.177.266 Serial 541
Permanent link to this record