PARAMAGNETIC AND OPTICAL SPECTRA OF DIVALENT COBALT IN CUBIC CRYSTALLINE FIELDS

Journal Article · Wed Jan 15 04:00:00 EST 1958 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.109.256· OSTI ID:4309141

Low, W

The optical and paramagnetic resonance spectra of divalent cobalt in MgO single crystals are reported. The optical spectrum consists of stronger lines which correspond to transitions between Stark levels of the same multiplicities and weak intercombination lines. If the Slater integrals are taken as free parameters then in the intermediate coupling scheme good agreement is obtained between the observed and calculated spectrum with Dq == 960 cm/sup -1/. The Slater integrals are reduced by about 8 to 10% from those of the free ion. The paramagnetic resonance spectrum shows one electronic isotropic transition consisting of eight hyperfine lines at g = 4.278/sub 5/ plus or minus 0.001 and A = (97.7/sub 9/ plus or minus 0.2) x 10/sup -4/ cm/sup -1/. The interpretation of these results shows that the orbital reduction factor k = 0.89 - -0.B5. Both the optical and paramagnetic results indicate covalent bonding. The effect of charge transfer is (1) to shield the nuclear charge and (2) to normalize the wave functions. Both these effects result in smaller Coulomb energy, hyperfine structure, amd spin-orbit coupling constant. No distortions of octahedral symmetry have been foumd to within 10/sup -3/cm/sup -1/. The static JahnTeller effect which predicts such a distortions is, therefore, very small. (auth)

• Research Organization: Hebrew Univ., Jerusalem, Israel
• NSA Number: NSA-12-005770
• OSTI ID: 4309141
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 109; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BINDING ENERGY
COBALT
COUPLING
COVALENCE
COVALENCY
ELECTRIC CHARGES
ELECTRIC POTENTIAL
ENERGY LEVELS
EQUATIONS
FREQUENCY
HYPERFINE STRUCTURE
INTEGRALS
INTERACTIONS
JAHN-TELLER EFFECT
LATTICES
MAGNESIUM OXIDES
MAGNETISM
MOLECULES
MONOCRYSTALS
NUMERICALS
PARAMAGNETISM
PHYSICS
RESONANCE
SLATER INTEGRALS
SPECTRA
SPECTROSCOPY
STARK LEVELS
WAVE MECHANICS