This Topics in Current Physics (TCP) Volume 34 is concerned primarily with super conductivity and magnetism, and the mutual interaction of these two phenomena in ternary rare earth compounds. It is the companion of TCP Volume 32 - Superconduc tivity in Ternary Compounds: Structural, Electronic and Lattice Properties. The interplay between superconductivity and magnetism has intrigued theoreticians and experimentalists alike for more than two decades. V. L. Ginzburg first addressed the question of whether or not superconductivity and ferromagnetism could coexist in 1957, and B. T. Matthias and coworkers carried out the first experimental inves tigations on this problem in 1959. The early experiments were made on systems that consisted of a superconducting element or compound into which small concentrations of rare earth impurities with partially-filled 4f electron shells had been intro duced. These dilute impurity systems were chosen because the scattering of conduc tion electrons by parama9. netic rare earth impurity ions usually has a strong de structive "pa i r breaking" effect on superconducti vity, typi ca lly drivi ng the super conducting transition temperature to zero at impurity concentrations of only a few atomic percent. Unfortunately, analysis of these early experiments was complicated by clustering and/or the formation of short range or "glassy" types of magnetic order so that definitive conclusions regarding the coexistence of superconductivity and magnetism could not be reached.

Inhalt

1. Magnetic Superconductors.- 1. 1 Introduction.- 1. 2 How The Problem of Magnetic Superconductors Originated.- 1. 3 Pairbreaking Effects Impurities and External Fields.- 1. 4 Impact of Ternary Rare Earth Compounds.- 1. 5 Antiferromagnetic Superconductors.- 1. 6 Ferromagnetism and Superconductivity.- 1. 7 Superconductivity and Competing Magnetic Interactions.- 1. 8 Concluding Remarks.- References.- 2. Systematics of Superconductivity in Ternary Compounds.- 2. 1 Review of Superconductivity in Ternary Compounds by Structure Class.- 2. 2 Concluding Remarks.- 2A. Appendix: Tables of Crystallographic, Superconducting and Magnetic Data for 14 Classes of Ternary Compounds.- References.- 3. Critical Fields of Ternary Molybdenum Chalcogenides.- 3. 1 Overview of Experimental Results.- 3. 2 Summary of Theory.- 3. 3 The Role of Impurities.- 3. 4 Anisotropy.- 3. 5 The Temperature Dependence of Hc2 and the Question of the Paramagnetic Limitation.- 3. 6 Compounds with Magnetic Ions. The Jaccarino-Peter Effect.- 3. 7 Critical Currents and the Problem of Wire Production.- References.- 4. Superconductivity, Magnetism and Their Mutual Interaction in Ternary Rare Earth Rhodium Borides and Some Ternary Rare Earth Transition Metal Stannides.- 4. 1 Background.- 4. 2 Ternary RERh4B4 Compounds.- 4. 3 Pseudoternary RERh4B4 Compounds.- 4. 4 Ternary REMxSny Compounds.- 4. 5 Summary.- References.- 5. Superconductivity and Magnetism in (RE)Mo6X8 Type Compounds.- 5. 1 Ternaries.- 5. 2 Pseudoternaries.- 5. 3 Analysis of Upper Critical Field Curves.- 5. 4 Overview of Exchange Interactions in (RE)Mo6X8 Compounds.- 5. 5 Summary.- References.- 6. Electronic Structure and Superconductivity/Magnetism in Ternary Compounds.- 6. 1 Theoretical Approach.- 6. 2 Chevrel Phase Compounds.- 6. 3 Ternary RhodiumBorides.- References.- 7 NMR and Mössbauer Studies in Ternary Superconductors.- 7. 1 Mössbauer Effect Studies of Local Vibrational Modes.- 7. 2 Conduction Electron-Local Moment Interactions in Paramagnetic Ternary Compounds.- 7. 3 Local Moments in Magnetically Ordered Rare-Earth Compounds.- 7. 4 Crystal Chemistry and Charge Transfer.- 7. 5 Conclusions.- References.- 8. Neutron Scattering Studies of Magnetic Ordering in Ternary Superconductors.- 8. 1 Neutron Scattering Theory.- 8. 2 Antiferromagnetic Superconductors.- 8. 3 Ferromagnetic Superconductors.- References.- 9. Theory of Magnetic Superconductors.- 9. 1 Influence of Spin Scattering on Superconductivity.- 9. 2 Magnetic Structures in Superconductors Resulting From Exchange Interactions.- 9. 3 The Magnetic State in the Presence of Electromagnetic Coupling.- 9. 4 Alternative Forms of Pairing States.- References.- Additional References with Titles.