Abstract
Temperature-modulated differential scanning calorimetry (TMDSC) has become a versatile technique for determining the specific heat (c p ) properties of condensed matter, but commercial instruments do not allow TMDSC measurements below 130 K. A top-loading cryostat incorporated within a commercial TMDSC instrument is presented, which allows c p measurements down to about 80 K with the use of liquid nitrogen as a coolant. As a consequence of the optimised thermodynamic properties of the heat exchanger the coolant consumption is appreciably low; the consumption of nitrogen at 90 K is below 1 1 h -1 . The power of this new TMDSC unit will be demonstrated by the presentation of c p results measured on two test materials at intermediate low temperatures, namely sapphire because of its well-known c p data, and 2-methylpentane.
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