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ERIC Number: EJ985439
Record Type: Journal
Publication Date: 2012-Jul
Pages: 14
Abstractor: As Provided
Reference Count: 43
ISBN: N/A
ISSN: ISSN-0143-0807
Demonstration Experiments for Solid-State Physics Using a Table-Top Mechanical Stirling Refrigerator
Osorio, M. R.; Morales, A. Palacio; Rodrigo, J. G.; Suderow, H.; Vieira, S.
European Journal of Physics, v33 n4 p757-770 Jul 2012
Liquid-free cryogenic devices are acquiring importance in basic science and engineering. But they can also lead to improvements in teaching low temperature and solid-state physics to graduate students and specialists. Most of the devices are relatively expensive, but small-sized equipment is slowly becoming available. Here, we have designed several simple experiments which can be performed using a small Stirling refrigerator. We discuss the measurement of the critical current and temperature of a bulk YBa[subscript 2]Cu[subscript 3]O[subscript 7 - [delta]] (YBCO) sample, the observation of the levitation of a magnet over a YBCO disc when cooled below the critical temperature and the observation of a phase transition using ac calorimetry. The equipment can be easily handled by students and also used to teach the principles of liquid-free cooling. (Contains 10 figures and 8 footnotes.)
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: info@ioppubusa.com; Web site: http://www.iop.org/EJ/journal/EJP
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A