Further calorimetric experiments on thallium

✍ Scribed by W.H. Keesom; J.A. Kok

• Book ID: 104160969
• Publisher: Elsevier Science
• Year: 1934
• Weight: 573 KB
• Volume: 1
• Category: Article
• ISSN: 0031-8914
• DOI: 10.1016/s0031-8914(34)80246-7

✦ Synopsis

1 ) The specific heats of thallium were measured with a magnetic field 0, while persistent currents were flowing.

2. A second series of measurements was made while a magnetic field had been applied to the metal and the persistent currents, arising from its application were flowing. Though we admit that these measurements were not very.numerous, they provide, in our opinion, a valuable confirmation of the hypothesis, that the transition of the supraconductive into the non-supraconductive state is a reversible process.

3. Results are given of experiments concerning the cooling, brought about by adiabatic magnetic, disturbance of supraconductivity.

4. The specific heats of non-supraconductive thallium at very low temperatures were measured. The results show that at a definite temperature the difference cs--c,, changes sign, which is in accordance with N e r n s t's theorem, provided this can be applied here.