Open AccessDIAGRAMMATIC REPRESENTATION FOR STONER'S COLLECTIVE ELECTRON THEORY OF FERROMAGNETISM
Author(s) -
H Hojgaard Jensen
Publication year - 1958
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.14.369
Subject(s) - ferromagnetism , condensed matter physics , diagrammatic reasoning , physics , electron , magnetization , basis (linear algebra) , representation (politics) , electronic band structure , simple (philosophy) , diagram , theoretical physics , quantum mechanics , mathematics , magnetic field , computer science , philosophy , geometry , epistemology , politics , political science , law , programming language , statistics
On the basis of the three premises of Stoner's collective electron theory of ferromagnetism, appropriate energy band diagrams are constructed. These diagrams vividly show the physical situation involved in Stoner's theory. With the help of diagrams, Stoner's criterion for occurrence of ferromagnetism, kθ′/ε0=ξ>2/3, and for complete magnetization, ξ≥2-1/3, can be deduced in a rather simple and straightforward way. With the help of diagrams, the transfer of electrons from d-band to s-band due to splitting of d-band in the ferromagnetic state is considered, and is estimated for nickel at 0°K to be about 1%.