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METHOD FOR MEASURING SPECIFIC HEATS IN INTENSE MAGNETIC FIELDS AT LOW TEMPERATURES USING CAPACITANCE THERMOMETRY.

Author(s) : LAWLESS W. N., CLARK C. F., ARENZ R. W.

Type of article: Article

Summary

CAPACITANCE THERMOMETRY IS USED, AND AN AUTOMATED DATA-COLLECTION SYSTEM UTILIZES THE IMBALANCE OF A TRANSFORMER-RATIO-ARM BRIDGE TO PROCESS THE CAPACITANCE DATA. THE ZERO-FIELD SPECIFIC HEAT MUST BE KNOWN, AND MEASUREMENT OF THE IN SITU DRIFT IN ZERO-FIELD CALIBRATES THE THERMAL LINK. ADDITIONAL CALIBRATION OF THE LINK IS REQUIRED IF THE LINK'S MAGNETOTHERMAL CONDUCTIVITY EFFECTS ARE SIGNIFICANT, AND A SPECIFIC EXAMPLE OF A COPPER-WIRE LINK IS PRESENTED. THE METHOD RESOLVES COMPLEX STRUCTURE IN THE SPECIFIC HEAT NEAR A STEEP LAMBDA-TYPE ANOMALY, AS ILLUSTRATED BY MEASUREMENTS ON A CHROMITE SPINEL AT 7.5 T. THE UNCERTAINTY IN THE METHOD IS ESTIMATED TO BE ABOUT 7%.

Details

  • Original title: METHOD FOR MEASURING SPECIFIC HEATS IN INTENSE MAGNETIC FIELDS AT LOW TEMPERATURES USING CAPACITANCE THERMOMETRY.
  • Record ID : 1983-1264
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 53 - n. 11
  • Publication date: 1982
  • Document available for consultation in the library of the IIR headquarters only.

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