Calorimetry by means of the relaxation and dual-slope methods below 1 K: application to some high Tc superconductors
Abstract
Relaxation and dual-slope methods for calorimetry at very low temperatures are described. They provide useful tools for measuring heat capacities of samples of several milligrams down to about 50 mK. As examples, measurements of the heat capacities of polycrystalline samples of the high temperature superconductors ErBa 2Cu 3O( 7-δ), YbBa 2Cu 3O( 7-δ) and HoBa 2Cu 3O( 7-δ) are presented, together with the experimental set-up and parameters. From the relaxation measurements the thermal conductions between the sample and the sample holder were calculated for all three experiments.
- Publication:
-
Cryogenics
- Pub Date:
- 1991
- DOI:
- 10.1016/0011-2275(91)90172-S
- Bibcode:
- 1991Cryo...31..168W