Question

Define adiabatic demagnetization

Answer 1

Adiabatic demagnetization is a process of cooling. It occurs in magneto-caloric materials. The principle is that these materials (especially rare-earth elements) heat up when placed in a magnetic field and cool down when removed from the magnetic field.

Answer 2

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An adiabatic process is one in which no heat is gained or lost by the system. The first law of thermodynamics with Q=0 shows that all the change in internal energy is in the form of work done. ... This condition can be used to derive the expression for the work done during an adiabatic process