ABSTRACT
There is a vast literature on this subject. Here we shall be
content with the following qualitative information;
6 IN TRO D U CTIO N
Table 1. 1
Examples of cr it ica l points and their order parameters
Crit ica l Point
Order Parameter Example T (°K ) c x '
Liquid-gas Density H2°
(3) 647. 05^ '
F e r r o - magnetic Magnetization Fe 1044.0(1)
An t ife rro - magnetic
Sublattice magnetization
F e F 2 7 8 .26(2)
X-line 4
He -amplitude He4 1. 8 - 2 . 1(4)
Superconductivity-
Electron pair amplitude
Pb 7. 19(5)
Binary fluid mixture
Concentration of one fluid
CC14 -C7F 14 301. 78(6)
Binary alloy Density of one kind on a sublattice
Cu-Zn 739(7)
F e rroe lec tr ic Polarization Trig lyc ine sulfate
322.5(8)
(1)Kadanoff et al. (1967). ( 2 ) K Ahler s et al. (1974). (λ)
J .M .H . Levelt Sengers (1974). (4)
G. Ahlers (1973).
