The hyperfine electron-nuclear interaction in distorted antiferromagnetic trinuclear metal clusters is considered. The joint effect of antisymmetric exchange, Heisenberg interactions and external magnetic field on the hyperfine structure of the EPR spectrum of trinuclear clusters is taken into account. It is shown that the type of hyperfine structure observed (equilateral, isosceles, scalene) depends upon the ratio between the antisymmetric exchange parameter on the one hand and both the effective parameters of distortions and resonance field on the other hand. Strong C2 type distortions result in a hyperfine spectrum characterized by intermediate spin. Strong antisymmetric exchange transforms the hyperfine spectrum to the trigonal type.
|Number of pages||11|
|Journal||Physica Status Solidi (B): Basic Research|
|State||Published - 1 Jan 1997|