Microscopic Approach to the Pseudo-Spin-1/2 Hamiltonian for Kramers Doublets in Exchange Coupled Co(II) Pairs

The microscopic theory of the magnetically anisotropic effective pseudo-spin-1/2 Hamiltonian for a pair of Co2+ ions is reported. In the framework of the second-order perturbation approach, the analytical expressions are found for the components of the tensor of the exchange interaction, g-tensor, a...

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Bibliographic Details
Published in:Inorganic chemistry 2003-04, Vol.42 (7), p.2455-2458
Main Authors: Palii, Andrei V, Tsukerblat, Boris S, Coronado, Eugenio, Clemente-Juan, Juan M, Borrás-Almenar, Juan J
Format: Article
Language:English
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Summary:The microscopic theory of the magnetically anisotropic effective pseudo-spin-1/2 Hamiltonian for a pair of Co2+ ions is reported. In the framework of the second-order perturbation approach, the analytical expressions are found for the components of the tensor of the exchange interaction, g-tensor, and the factor in the temperature independent paramagnetic contribution. The parameters of the Hamiltonian are expressed in terms of the basic intra- and intercenter parameters of the pair, namely, the spin−orbit coupling constant, orbital reduction factor, exchange integral, and low symmetry crystal field parameters including axial and rhombic terms.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic0259686