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Semiclassical approximation in the magnetic problem of exchange-coupled mixed valence clusters

✍ Scribed by J.J. Borrás-Almenar; E. Coronado; H.M. Kishenevsky; B.S. Tsukerblat

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
474 KB
Volume
217
Category
Article
ISSN
0009-2614

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✦ Synopsis

The frameworks of the applicability of the semiclassical adiabatic approach suggested by Borras-Almenar, Coronado and Tsukerblat to the magnetic problem of mixed valence clusters are considered in a model taking into account magnetic exchange, double exchange and vibronic interaction. The results for the quantum-mechanical and semiclassical calculation of the temperature-variable magnetic moments are compared with those within the scope of the semiclassical approximation for the dimeric d'-d2 clusters and trimeric d'-d'-d2 systems with partial delocalization over a pair of ions. The semiclassical approach describes with high accuracy the temperature dependencies of the magnetic moments. Cases of the inapplicability of the semiclassical approach are pointed out.

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