G. Kaiser et al., PROPERTIES OF THE COMMERCIALLY AVAILABLE MAGNETORESISTIVE SENSOR KMZ10A IN THE TEMPERATURE-RANGE BETWEEN 50 AND 290 K, Cryogenics, 38(2), 1998, pp. 187-190
We have performed experimental investigations in order to determine th
e sensitivity and the resistance of the KMZ10A magnetoresistive (MR) s
ensor in the temperature range between 50 and 290 K by using a cryocoo
ler. The sensitivity increases for a decrease of temperature whereas t
he resistance decreases. At 50 K the MR sensor shows 1.33 times the se
nsitivity that it does at 290 K. The resistance at 50 K is 0.52 times
the resistance at 290 K. Noise measurements performed in a cryoperm sh
ielding at room temperature and at 77 K in liquid nitrogen have shown
that the voltage fluctuation in the white noise range of the MR sensor
is equal to that of an equivalent resistor leading to a resolution of
44 pT/root Hz at room temperature and 13 pT/root Hz at 77 K. (C) 1997
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