Abstract
Molecular magnetism is a discipline devoted to the conception, the design, synthesis, study, and the uses of new magnetic molecular systems with original but predictable properties. First, basic theoretical principles used to describe magnetic molecular objects, transition metal complexes, and the molecular spin are presented. Phenomenological descriptions with spin Hamiltonians and effective Hamiltonians follow. Magnetic exchange interaction, one of the leading problems in the field, is tackled in some detail from two viewpoints: heuristic models based on Hund–Mulliken and Heitler–London schemes and computational methods. The basic principles of magnetic anisotropy are summarized without developments on single-molecule magnets, dealt elsewhere. The last section presents briefly the exciting prospects opened by the intrusion of spin into (molecular) electronics, the new field of molecular spintronics.
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