Abstract

The ESR-spectrum of SnO2: Fe3+ consists of absorption lines which originate from Fe3+-ions on lattice and intersistial sites. Assuming g=2.00 the following approximate zero-field splittng-factors are obtained: |D|=0.681 cm-1, |E|=0.072 cm-1. A further structure of these lines is due to interactions of various strength with neighbouring tin nuclei. A SHFS is also resolved in the ESR-spectrum of Fe3+ on intersistial sites. The origin of a few Gauss fine-structure-splitting is not yet understood.

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