
Accession Number : AD0613977
Title : FERROMAGNETISM IN THE TRANSITION METALS,
Corporate Author : ILLINOIS UNIV URBANA DEPT OF PHYSICS
Personal Author(s) : Beeby,J. L.
Report Date : 1965
Pagination or Media Count : 45
Abstract : It has been shown that a model in which the saturation magnetisation of an alloy is dependent on the sd admixture can lead to resonable agreement with experiment. In order to calculate the changes in saturation magnetisation it was necessary to put forward a model for the origin of the ferromagnetism. This model, though very crude, nevertheless suggests important differences between the b.c.c. and f.c.c. lattices, principally in the behavior of the electronelectron correlation energy. Regarding the correlation energy as being the dominant effect in determining the stable lattice structure leads to the correct ranges of stability for the lattice structure as e/a varies for both the ferromagnetic and nonferromagnetic series. It is clear that an improved version of the itinerant electron model calculation is necessary. This should include the hybridisation of the bands, both s and dbands being those for the alloy in question. Some model of the exchange energy must be postulated. Even in the absence of such a first principle calculation of the exchange energy, it is evident that the existing experimental data, especially that concerning the alloys, contains a great deal of information which can be used to resolve some of the remaining difficulties concerning the delectrons. (Author)
Descriptors : (*FERROMAGNETISM, TRANSITION METALS), (*TRANSITION METALS, FERROMAGNETISM), ALLOYS, MAGNETIC PROPERTIES, CRYSTAL LATTICES, ATOMIC ENERGY LEVELS, ELECTRON TRANSITIONS, PARTIAL DIFFERENTIAL EQUATIONS, IMPURITIES, CORRELATION TECHNIQUES, ELECTRONS
Distribution Statement : APPROVED FOR PUBLIC RELEASE