Low-temperature thermometry in high magnetic fields. V. Carbon-glass resistors

Abstract

The characteristics of carbon-glass resistance thermometers for temperatures from 2.15 to 320 K and in magnetic fields of up to 19 T are described. The results from nine thermometers made from six different batches of raw material are combined to produce mean values that may be used to correct a ’’typical’’ thermometer at 19 T to within ±0.1% in temperatures between 30 and 320 K, and to within ±1% between 2.15 and 30 K. All nine sensors show a small orientation dependence of their magnetoresistance at 77 K; two out of four tested have an experimentally significant dependence at 4.2 K. The temperature error corresponding to the magnetoresistance of a miniature precision platinum resistance thermometer at 19 T is less than for carbon-glass sensors above 77 K. New recommendations are made for the optimum use of low-temperature thermometers in high magnetic fields.

Low‐temperature NMR techniques

“…Thermometers Because of their insensitivity to magnetic fields, carbon-in-glass thermometers (Lake Shore Cryotronics) are very popular (8). For about $500 one can purchase a thermometer that is calibrated for 4.2-100 K. Resistance thermometers should always be used with a 4-wire measurement technique.…”

Non-linear excitations in Ising-type magnetic chain systems I

“…The temperature measurement of the absorber was carried out with a four point AC bridge, utilizing a glass-carbon resistance thermometer calibrated in our laboratory [22]. In a magnetic field the resistance value has been corrected as proposed by Sample [23]. The measurement stability, reproducibility, and accuracy were in all cases better than 0.5%.…”

Cryogenic temperature measurement for large applications

“…Resistance sensors are therefore the most widely used ones in cryogenics. Many excellent review articles [5,6,7,8,9] treat cryogenic resistance thermometry, and we shall only briefly outline the most popular sensor types below.…”