Abstract
All interactions responsible for magnetism in solids are sensitive to interatomic distances. Application of high external pressure offers a unique possibility to study these aspects of magnetism. Moreover, results of the pressure experiments are not contaminated by parasitic effects accompanying the chemical substitutions used to vary the interatomic distances. The informative phenomenological as well as microscopic point of view on the pressure-induced changes of magnetic interactions, moments, magneto-crystalline anisotropy, and phase transitions in systems with localized and itinerant magnetic moments is presented. Pressure-induced magneto-volume instabilities in the magnetic alloys and intermetallic compounds with the 3d-, 4f-, and 5f-electron elements are discussed. Short basic information concerning the studies of the heavy fermion compounds, systems that exhibit the non-Fermi-liquid behavior, multiferroic and multifunctional materials, and single-molecule magnets under high pressure are collected. The appropriate high-pressure technique is shortly mentioned.
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