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Collective electron assemblies in a metal with overlapping energy bands

Part II. The occurrence of ferromagnetism

Published online by Cambridge University Press:  24 October 2008

William Band
William Band
Affiliation:
Department of PhysicsYenching UniversityPeiping, China
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Extract

In Part I of this series it was shown that in a metal with overlapping energy bands, one of which is nearly full and the other nearly empty, there exists a critical temperature below which spontaneous magnetization will be present, Tc being given approximately by the equations

where kθ is the exchange energy term postulated by Stoner, b is the ratio of excess vacancies in the d-band to the maximum possible number of parallel spins, and ζd0 is the equivalent energy depth of the vacant levels in the d-band.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 42 , Issue 2 , June 1946 , pp. 144 - 155
Copyright
Copyright © Cambridge Philosophical Society 1946

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References

REFERENCES

(1)Fowler, and Guggenheim, . Statistical thermodynamics (Cambridge, 1939), §§ 1447, 1448.Google Scholar
(2)Ref. (1), p. 474, Table 1.Google Scholar
(3)Wilson, A. H.Semi-conductors and metals (Cambridge, 1939), p. 81.Google Scholar