Low temperature thermometry in high magnetic fields. VII. CernoxTM sensors to 32 T

This article describes the behavior of CernoxTM zirconium oxynitride film temperature sensors from Lake Shore Cryotronics, Inc. in magnetic fields up to 32 T at temperatures between 2 and 286 K. Results from a number of sensors with different dimensionless temperature sensitivities and from different production batches are analyzed and compared with previous results on carbon-glass sensors that extend to 19 T. In that field range, the CernoxTM sensors appear to be a real alternative to carbon glass. Furthermore, the magnitude of their uncorrected error, DT/T , is smaller than other sensors at most temperatures in fields less than 20 T, and their temperature correctabilities appear to apply to off-the-shelf sensors with dimensionless temperature sensitivities in the range of 20.74 to 21.9. The sensors show a negligible ~,0.05%! orientation dependence of their DR/R at 78 K; at 4.2 K, that dependence can be as high as ;0.7% at 20 T. © 1999 American Institute of Physics. @S0034-6748~99!04701-2#