Abstract
The temperature of a loop with a tip mounted in an FIM has been measured by a four terminal method under the influence of gas molecules. The temperature distribution in the tip and the loop has been calculated by taking into account Joule's heat, the thermal conductance through the tip and the loop, the heat radiation from these surfaces and the heat taken away by the impinging gas molecules. The gas effect is appreciable at pressures higher than 10-2 Pa of He, Ne and H2. By making a tip with Ni, Au or Al, the loop temperature at an instance the tip melts has been measured. The calculated temperature agrees pretty well with the respective melting point.
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