Accession Number : AD0647956

Title :   SUPEREXCHANGE INTERACTION BETWEEN MAGNETIC ION PAIRS AND SUPER TRANSFERRED HYPERFINE INTERACTION IN WEAKLY COVALENT CRYSTALS.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF PHYSICS

Personal Author(s) : Huang,Nai Li

Report Date : DEC 1966

Pagination or Media Count : 178

Abstract : The Dirac-Van Vleck-Serber's method of configuration interaction is extended and systematized in order to handle the interaction between transition metal ions. Specific applications are made to the following problems: (i) Exchange interaction between nearest V(2+) neighbors in KMgF3 (collinear superexchange); (ii) Exchange interaction between nearest V(2+) neighbors in MgO (right angle superexchange); (iii) Superexchange interaction between next nearest V(2+) and Ni(2+) neighbors in MgO (exchange between inequivalent ions). The change in hyperfine field at a magnetic cation site due to cation - cation interaction is also calculated.

Descriptors :   (*DIELECTRICS, INTERACTIONS), (*PARAMAGNETIC MATERIALS, INTERACTIONS), (*VANADIUM, ATOMIC ORBITALS), (*NICKEL, ATOMIC ORBITALS), (*ATOMIC ORBITALS, EXCHANGE REACTIONS), MATHEMATICAL MODELS, PERMUTATIONS, WAVE FUNCTIONS, IONS, CRYSTAL LATTICES, POTASSIUM COMPOUNDS, MAGNESIUM COMPOUNDS, FLUORIDES, MAGNESIUM OXIDES, ATOMIC ENERGY LEVELS, INTEGRALS, NUCLEAR SPINS, ELECTROSTATICS, HYPERFINE STRUCTURE, CHEMICAL BONDS, MOLECULAR ORBITALS

Subject Categories : Electricity and Magnetism
      Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE