N. Nagashima et al., COMPARISON OF QUANTIZED HALL RESISTANCES RH(2) AND RH(4) OF A GAAS ALGAAS HETEROSTRUCTURE DEVICE/, IEEE transactions on instrumentation and measurement, 43(4), 1994, pp. 521-525
Quantized Hall resistances R(H)(4) and R(H)(2) of a GaAs/AlGaAs hetero
structure were compared with reference resistors whose values are clos
e to h/4e2 or h/232. The values of the reference resistors were compar
ed with a 100 ohm standard resistor via a cryogenic current comparator
(CCC) resistance bridge. Results showed that (4 x R(H)(4) - 2 x R(H)(
2))/2 x R(H)(2) = (0.037 +/- 0.019) x 10(-6).