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Covalent mechanism of cooperative optical transitions in lanthanide exchange‐coupled pairs. Intensity calculations for double transitions in a M 2 L 11 f 1 –f 1 dimer
Author(s) -
Mironov V. S.,
Kaminskii A. A.
Publication year - 1996
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221940127
Subject(s) - superexchange , lanthanide , dimer , covalent bond , excited state , chemistry , bridging ligand , crystallography , ion , ground state , polarization (electrochemistry) , octahedron , ligand field theory , atomic physics , molecular physics , physics , crystal structure , organic chemistry
The covalent mechanism of cooperative optical transitions in exchange‐coupled pairs of lanthanide ions (which is closely related to the magnetic superexchange mechanism) is analyzed in detail for a simple M 2 L 11 f 1 –f 1 model dimer (two ML 6 octahedra sharing one bridging ligand L). New effective electron transfer pathways in the M(A)–L–M(B) exchange system are considered and intensities of cooperative transitions from the (00) ground state to ( ij ) doubly‐excited states of the f 1 –f 1 dimer are calculated including polarization effects.