Abstract
We have measured the resistance of commercial thick-film chip resistors (Dale Type RC550, nominal resistance R = 500 Ω) as a function of temperature (8 mK ≤ T ≤ 10 K) and magnetic field B ≤ 7 T (for T ≥ 0.3 K) at different orientations between input current, main area and magnetic field. At 30 mK ≤ T < 10 K the temperature dependence of the resistance follows R = A exp ( B T 1 4 ) in agreement with published data for a 1 kΩ thick-film chip resistance. In contrast to previously published studies of similar resistors we measured a resistance that increases approximately linearly with field at T < 1 K and quadratically at higher temperatures. The sensitivity to magnetic fields decreases from (0.8 ± 0.1)% T −1 at 0.3 K to 0.1% T −1 above 2 K for B = 1 T.
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