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Physics
Chemistry
Organic Chemistry

Why ferromagnetic substances are not used in adiabatic demagnetization?

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April 27, 2008 8:02PM

A system that is a perfect ferromagnet has all the spins aligned whether or not there is an external magnetic field. As a result applying an external magentic field does not change the spin configuration at all, and does not change the entropy at all. Therefore this will not change the temperature.