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Thermal impedance between a thick-film resistor liquid helium below 1 K

Dötzer, R. ; Schoepe, Wilfried



Abstract

We have investigated the temperature dependence of the thermal impedance between a thick-film resistor used as a thermometer and liquid helium at temperatures between 1 K and 15 mK. Above 100 mK the impedance is found to vary as T−2, whereas at lower temperatures a T−3 law is obtained. The prefactors are unsually large when compared with Kapitza resistance or thermal conductivities.


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