Title :
Temperature dependence of metrological characteristics of quantum Hall effect samples
Author :
J. Bohacek;P. Svoboda;P. Vasek
Author_Institution :
Dept. of Meas., Czech Tech. Univ., Prague, Czech Republic
Abstract :
Influence of temperature on frequency performance of an AlGaAs-GaAs heterostructure fabricated by Laboratoires d´Electronique Philips has been investigated. The structure was placed into a /sup 4/He bath and significant improvement of its frequency performance has been observed when the operational temperature was reduced from 4.2 K to 1.6 K. For T=1.6 K and I=30 /spl mu/A, an approximately linear frequency dependence of the quantized Hall resistance R/sub H/(2) was found, its slope being 0.11 ppm/kHz.
Keywords :
"Temperature dependence","Hall effect","Frequency measurement","Electrical resistance measurement","Calibration","Resistors","Superconducting magnets","Bridges","Helium","Magnetic flux"
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1998. IMTC/98. Conference Proceedings. IEEE
Print_ISBN :
0-7803-4797-8
DOI :
10.1109/IMTC.1998.676925
