Accession Number : AD0693352

Title :   CALCULATION OF SOME YTTERBIUM-OXYGEN-IRON SUPEREXCHANGE INTEGRALS,

Corporate Author : LOCKHEED MISSILES AND SPACE CO PALO ALTO CALIF LOCKHEED RESEARCH LAB

Personal Author(s) : Pearson,J. J. ; Herrmann,G. F.

Report Date : 1969

Pagination or Media Count : 3

Abstract : Past calculations of the anisotropic superexchange interaction between Yb(3+) and Fe(3+) in the garnets have made use of drastic assumptions about the form of the exchange potential. A more fundamental calculation has been impossible until now because of a lack of detailed knowledge of the relative magnitudes of the superexchange integrals. We have calculated the nineteen exchange integrals between the different combinations of O(2-) p orbitals and Yb(3+) f orbitals. The O(2-) wave functions were taken from Watson's analytic Hartree-Fock calculation and the Yb(3+) wave functions were calculated using a Hartree-Fock computer program of F. Herman. (Author)

Descriptors :   (*GARNET, EXCHANGE REACTIONS), POTENTIAL THEORY, IRON, YTTERBIUM, IONS, INTEGRALS, WAVE FUNCTIONS, INTERACTIONS

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE