Français
4. Thermomagnetic effects
4.1 Fundamental principles
The entropy of a magnetic solid is the sum of two contributions:
a magnetic contribution due to directional disorder of magnetic moments ;
the contribution of thermal vibrations of the crystal lattice (phonons), explained simply as lattice contribution in the following, found in all solids.
By applying a magnetic induction B at constant temperature, we reduce the magnetic entropy S M in the same way as the entropy of a gas is reduced by isothermal compression.
In algebraic value, we have :
The Ultimate Scientific and Technical Reference
This article is included in
Industrial cooling
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Thermomagnetic effects
Conclusion for general refrigeration production
Bibliography
Events
IIF International Conference on Cryogenics and Refrigeration Technology commissions A1, A2, C1 Romania, Bucharest june 22-25 2016 ISSN : 0151-1637
French Congress of the French Society of Thermal Engineers (Marseille May 30 - June 2, 2017)
Directory
Manufacturers – Suppliers – Distributors of cryogenic equipment (non-exhaustive list)
Stirling Cryogenics BV, science park Eindhoven The Netherlands
The Ultimate Scientific and Technical Reference
