The sixth Taniguchi Symposium on the Theory of Condensed Matter was held between 14-18 November 1983 at Kashikojima. Japan. During the Symposium, about twenty participants lived together and discussed the magnetic super conductors and related problems in an active and friendly atmosphere. This volume contains the papers presented at this Symposium. A strong impetus for organizing a Symposium of this subject is afforded by recent intense interest and accumulated information on magnetic and other novel superconductors newly discovered, and indeed the Symposium has pro duced many excellent contributions to this very exciting field of condensed matter theory, as reported in this volume. In order to give the readers a general outline of the subject, a brief sketch of the problem is made in the Introduction. Then the remainder of this volume is divided into four Parts and an Appendix. Part I is devoted to di scuss ions on several aspects of ferromagnetic superconductors includ ing superconductivity in heavy fermion systems. Part II treats problems on anti ferromagnetic superconductors. In Part III three papers on organic supercon ductors are presented. Part IV includes discussions on the exotic supercon ductors. The Appendix is concerned with the new research project towards high Tc superconductors in Japan. The last but not least remark is to mention the activity of the Taniguchi Foundation whose support makes this Symposium possible. For many years Mr.

Inhalt
I Ferromagnetic Superconductors.- Neutron Scattering Studies of Magnetic Superconductors.- A Theory for Ferromagnetic Superconductors.- Superconductivity and Magnetism in Rare Earth and Actinide Compounds.- Electromagnetic Properties of Ferromagnetic Superconductors.- Josephson Effect in Ferromagnetic Superconductors.- An Inhomogeneous Superconducting State in a Ferromagnetic Superconductor.- II Antiferromagnetic Superconductors.- Theory of Antiferromagnetic Superconductors.- The Coexistence of Superconductivity and Antiferromagnetism.- Effect of a Homogeneous Magnetic Field on One-Dimensional Antiferromagnetic Superconductors.- Effect of Impurities on Antiferromagnetic Superconductors.- III Organic Superconductors.- Organic Superconductors.- Theory of the SDW and Superconducting Phases in the Bechgaard Salts.- Theory of Infrared Conductivity from Density Waves: (TMTSF)2ClO4.- IV BaPb1?xBixO3 and Some Metal Hydrides.- BaPb1?xBixO3 An Example of the Strong Coupling Limit of Superconductivity?.- Superconductivity in Some Metal Hydrides.- A New Research Project in Japan on Superconducting Materials.- Index of Contributors.