Abstract
Publisher Summary The rapid progress in the study of borocarbides is closely connected with the availability of high quality polycrystalline samples over a wide range of compositions as well as single crystals early in the development of the field. The main trends of the superconducting properties and ordering of the rare earth's magnetic moments have been elucidated. One of the most interesting aspects of borocarbides is the possibility to observe coexistence and competition between superconductivity and magnetic order. Most of the zero-field magnetic structures have been obtained, but a number of key questions remain to be clarified. A variety of both commensurate and incommensurate magnetic structures was observed. To explain these structures theoretically a detailed understanding of the role of super exchange versus indirect exchange, combined with single-ion crystal field and hybridization effects, is needed. Inelastic neutron scattering experiments giving the form of magnetic excitation spectra can provide a detailed picture of these interactions.
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