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The Principles of Thermodynamics
book

The Principles of Thermodynamics

by N.D. Hari Dass
October 2013
Intermediate to advanced content levelIntermediate to advanced
352 pages
13h 56m
English
CRC Press
Content preview from The Principles of Thermodynamics
290 The Principles of Thermodynamics
After having spelled out all these generalities, we now restrict ourselves to cases
where the susceptibility obeys the Curie law
χ
=
a
T
(see chapter 8 for a fuller discus-
sion). As shown there, all expressions can be explicitly worked out, and in particular
S(B
e
,T)=S(0,T)
1
2
Va
B
2
e
T
2
(14.22)
The important consequence of this is that for paramagnetic substances, for which
a > 0,entropydecreases as the magnetic eld is increased. From our general consid-
erations it then follows that cooling results upon adiabatic demagnetization.Before
discussing the magnitude of the various effects, let us note that another consequence ...
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Publisher Resources

ISBN: 9781466512085