Electron Paramagnetic Resonance of Exchange Coupled Systems - Tapa dura

This book is intended to collect in one place as much information as possible on the use of EPR spectroscopy in the analysis of systems in which two or more spins are magnetically coupled. This is a field where research is very active and chemists are elbow-to-elbow with physicists and biologists in the forefront. Here, as in many other fields, the contributions coming from different disciplines are very important, but for active researchers it is sometimes difficult to follow the literature, due to differences in languages, and sources which are familiar to, e. g. , a physicist, are exotic to a chemist. Therefore, an effort is needed in order to provide a unitary description of the many different phenomena which are collected under the title. In order to define the arguments which are treated, it is useful to state clearly what is not contained here. So we do not treat magnetic phenomena in conductors and we neglect ferro- and antiferromagnetic resonance. The basic foundations of EPR spectroscopy are supposed to be known by the reader, while we introduce the basis of magnetic interactions between spins. In the first two chapters we review the foundations of exchange interactions, trying to show how the magnetic parameters are bound to the electronic structure of the interacting centers.

The subject of this book is EPR Spectroscopy of systems in which two or more spins are magnetically coupled. These systems are relevant to many different scientific areas, ranging from chemistry to solid state physics and to biology. The book is based on the spin hamiltonian approach and extensive use is made of irreducible tensor techniques. The most novel feature is that for the first time the whole field is brought together including pairs, oligonuclear species and infinite species, in an attempt to provide a unitary approach. The book collects in one place information which up to now has been scattered in many different original papers, reviews and books.