Problem of Measuring Heat Capacity
of Pressure Sensitive Organic Conductor

We report on large influence of inhomogeneous pressures in pellet samples of molecular based organic salts using the relaxation calorimetry technique. The pressure sensitive single-component molecular conductor obtained as powder sample has been palletized with a diameter of 1.5 mm and thickness of 0.5 mm. We have measured heat capacity by our original relaxation calorimeter available at 3He temperature region. We observed unexpectedly large sample dependences in low-temperature heat capacities owing to the difference of pellet formation conditions. The observed behavior is probably related to the delicate lattice and electronic structure of the molecular compound.

(by T. Moriura & S. Yamashita & Y. Nakazawa)

	Fig.1, (a) Molecular structure and (b) crystal structure of Au(tmdt)2.
	Fig.2, Result of low temperature heat capacity measurements of four different pellets of Au(tmdt)2.
	Fig.3 Low temperature heat capacity of Au(tmdt)2 under various magnetic field.