Abstract
An apparatus for adiabatic rotation of a sample in a magnetic field at liquid helium temperatures is described. It has been used for the observation of magnetothermal oscillations of metal single crystals as a function of their orientation in a magnetic field. While the sample is being rotated, magnetothermal oscillations as small as 10−6 K were observable; nonsteady (random) heat transfer or heat generation (heat pulses) under favorable conditions was found to be less than 10−5 K (a few milliergs). It appears that the apparatus is useful for a variety of other experiments where it is desirable to change the orientation of a sample in a solenoid either adiabatically or isothermally.
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