Abstract

The application of external magnetic fields allows to broaden the knowledge, which can be gained by Mossbauer spectroscopy enormously. In combination with magnetic measurements, detailed information about local magnetic and electronic structure can be obtained. After an introduction to the influence of an external magnetic field on hyperfine interactions, examples are given. Starting from simple magnetic structures like para-, ferro-, and antiferro-magnetic ones, investigations on complex magnetic structures with spin canting are discussed. Also results on materials with inhomogeneous magnetic structures like spin glasses will be presented. Special focus will be on the influence of high external fields on the spin dynamics.

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