Accession Number : AD0634906

Title :   PARAMAGNETIC IMPURITIES IN IONIC CRYSTALS.

Descriptive Note : Final scientific rept. for 25 Jan 66,

Corporate Author : FRANKLIN INST RESEARCH LABS PHILADELPHIA PA

Personal Author(s) : Neaves, A. ; Lin,C. ; Tint,G. S.

Report Date : FEB 1966

Pagination or Media Count : 163

Abstract : The report deals primarily with the results obtained on the systems LiF:Mn(2+) and Y2O3. The theoretical aspects of S-state transition metal ions in host-crystals is dealt with and applied to Mn(2+) in lithium fluoride. It is found that the method of molecular orbitals used to consider problems of limited covalency is not valid throughout the whole range of Mn(2+) F(-) bond distances. The possible role of ferromagnetic impurities in yttria and their relation to thermoluminescence in that materials is discussed. A point charge calculation of the crystalline electric field acting on Fe(3+) situated on the 8b site in vttria is detailed. The systems alpha-Al2O3, NaCl:Cu(2+) and NH4Cl:Mn(2+) are discussed briefly. (Author)

Descriptors :   (*CRYSTALS, IMPURITIES), (*TRANSITION METALS, ATOMIC ENERGY LEVELS), (*PARAMAGNETIC RESONANCE, *MANGANESE), (*YTTRIUM COMPOUNDS, OXIDES), PARAMAGNETIC MATERIALS, LITHIUM COMPOUNDS, FLUORIDES, MOLECULAR ORBITALS, VALENCE, CHEMICAL BONDS, FERROMAGNETIC MATERIALS, LUMINESCENCE, CRYSTAL DEFECTS, ALUMINUM COMPOUNDS, SODIUM COMPOUNDS, AMMONIUM COMPOUNDS, CHLORIDES, COPPER

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE