Basic experimental and theoretical results on ruthenates and rutheno-cuprates are reviewed. The electronic structure of various ruthenates and exotic superconductivity in Sr₂RuO₄ with spin-triplet pairing are described. The complex phase diagram of Ca_2-xSr_xRuO₄, involving competing magnetic phases and metal-insulator transitions, is described, as are the exotic magnetic properties of Sr₃Ru₂O₇ and of the double perovskite Sr₂YRuO₆, and the coexistence of superconductivity and magnetism in the rutheno-cuprate RuSr₂GdCu₂O₈. Possible applications of Sr₂RuO₄ and SrRuO₃ are considered. The effect of strong electron correlations is discussed, and the properties of ruthenates and cuprates are compared.

PACS: 71.21.+a, 74.25.Jb, 74.70.Pq (all) DOI: 10.1070/PU2003v046n01ABEH001235 URL: https://ufn.ru/en/articles/2003/1/b/ 000183153400002 Citation: Ovchinnikov S G "Exotic superconductivity and magnetism in ruthenates" Phys. Usp. 46 21–44 (2003) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Оригинал: Овчинников С Г «Экзотическая сверхпроводимость и магнетизм в рутенатах.» УФН 173 27–50 (2003); DOI: 10.3367/UFNr.0173.200301b.0027