MAGNETORESISTANCE OF THE NEW CERAMIC CERNOX THERMOMETER FROM 4.2 K TO300 K IN MAGNETIC-FIELDS UP TO 13 T

Measurements of the resistance and the magnetoresistance of a new cera mic thin-film temperature sensor (Cernox-1080, Lake Shore Cryotronics Inc.) are reported for magnetic fields up to 13 T in the temperature r ange 4.2 to 300 K. The zero-field resistance changes monotonically ove r more than three orders of magnitude with a negative temperature coef ficient. The magnetoresistance is small at temperatures above 10 K and exhibits partially compensating positive and negative components. The magnetic-field induced temperature reading error at 13 T is about 2% at 4.2 K and less than 0.3% at 10 K and above. In the temperature rang e 80 to 300 K, the magnetoresistance can be approximated by a fourth-o rder polynomial, allowing for an estimation and correction of the appa rent temperature reading error of the Cernox thermometer in high magne tic fields. (C) 1997 Elsevier Science Ltd. All rights reserved.