Rare earth transition metal borocarbides (Nitrides): Superconducting, magnetic and normal state properties : proceedings of the NATO Advanced Research Workshop on Rare Earth Transition Metal Borocarbides (Nitrides): Superconductiong, Magnetic and Normal S

This volume contains most of the contributions presented at the NATO Advanced Research Workshop on Rare Earth Transition Metal Borocarbides (Nitrides): Superconducting, Magnetic and Normal State Properties, held in Dresden, Germany at 13 - 18 June 2000. The Workshop was chaired by K. -H. MUller and V. N. Narozhnyi. This was the first meeting specially focused on the quaternary rare-earth transition-metal borocarbides and nitrides - a new class of magnetic superconductors discovered in 1994. The motivation for organizing this workshop was to bring together scientists (both experimentalists and theoreticians), actively working in this field in different countries, using different methods, to exchange their points of view on the properties ofthese materials and to recognize the directions for future research. Totally 48 participants from 17 countries ofEurope, the United States, BraZil, India, Israel and Japan took part in this meeting. In addition about 15 observers (mainly from Germany) attended. The scientific Programme of the Workshop was composed of 7 sections. The section Introduction and Overview was followed by the Electronic Structure and Properties and Phonon Spectra; Magnetic Properties and CEF Effects; Interplay between Superconductivity and Magnetism; Vortex Lattice; Thin Films; Nature of the Superconducting State in Borocarbides sections. Totally 50 presentations were given (45 ofthem in oral form). Considerable attention was devoted to the characterization of the particular place of borocarbides amongst the other magnetic and superconducting systems and, especially, magnetic superconductors. Front Matter....Pages i-xii Quaternary Borocarbides- Discovery and Overview....Pages 1-20 Introduction to the Structure and Chemistry of the Superconducting Borocarbides and Boronitrides....Pages 21-32 Effects of Local Moment Magnetism on The Superconducting Properties of RNi 2 B 2 C Compounds....Pages 33-44 Comparison of the Borocarbide and Boronitride Superconductors....Pages 45-50 Properties of the RniBC System: A Comparison with RNi 2 B 2 C....Pages 51-62 Electronic Structure of Y and Lu Borocarbides Determined by de Haas—van Alphen Experiments....Pages 63-69 Electronic Structure and Related Properties of Rare Earth Transition Metal Borocarbides -LDA Bandstructure Analysis....Pages 71-82 First Principles Study of Electronic Structure of Rare....Pages 83-88 Specific Heat of Y x Lu 1-x Ni 2 B 2 C in the Mixed State....Pages 89-94 Andreev-Reflection and Point-Contact Spectroscopy of Superconducting Rare Earth Transition Metal Borocarbides....Pages 95-108 Inelastic Light Scattering Studies of Borocarbide Superconductors....Pages 109-114 Electrical, Thermoelectric, and Thermal Transport in Single Crystal Rare-Earth Nickel Borocarbides RNi 2 B 2 C....Pages 115-120 Neutron Studies of Exchange-Coupled Superconductors....Pages 121-130 Crystalline Electric Field and Cluster Effects in Borocarbide Superconductors....Pages 131-136 Crystal Field Effects in Borocarbides Studied by Inelastic Neutron Scattering....Pages 137-154 Metamagnetic Structures of HoNi 2 B 2 C....Pages 155-162 Magnetic Excitations in YbNi 2 B 2 C....Pages 163-169 Anomalous Behavior of Pr-Based Borocarbides: Comparison with Cuprates....Pages 171-180 Magnetoelastic Effects in Rare Earth Nickel Borocarbides....Pages 181-186 Magnetism and Superconductivity in the Rare Earth Nickel Borocarbides....Pages 187-196 The Interrelation Between Magnetism and Superconductivity in RNi 2 B 2 C: The Mössbauer Effect....Pages 197-210 Non-Local Effects in Magnetization and Torque of Quaternary Borocarbides....Pages 211-222 Weak Ferromagnetism in Superconducting ErNi 2 B 2 C....Pages 223-232 Superconductivity and Magnetism in Ruthenocuprates and Borocarbides....Pages 233-242 Influence of Disorder on Superconductivity in Rare-Earth Nickel Borocarbides....Pages 243-254 Magnetic Order and Superconductivity in Ho 1-x Lu(Y) x Ni 2 B 2 C....Pages 255-264 Recent Aspects of Non Stoichiometry Effects on the Superconducting Properties of HoNi 2 B 2 C x (x=0.6 to 1.4)....Pages 265-274 Impurity Scattering in Rare-Earth Nickel Borocarbides....Pages 275-280 Anisotropic Upper Critical Field in Tb x Y 1-x Ni 2 B 2 C Single Crystals....Pages 281-286 Borocarbides: Influence of Magnetic Order on Normal and Superconducting Properties....Pages 287-296 Coexistence of Magnetism and Superconductivity in HoNi 2 B 2 C....Pages 297-302 Superconductivity and Magnetism Coexistence in Borocarbides: Some Theoretical Aspects....Pages 303-312 Flux Line Lattice Symmetry Transitions in the Borocarbide Superconductors....Pages 313-322 High Resolution Neutron Diffraction Studies of the Flux- Line Lattice in Borocarbide Superconductors....Pages 323-332 Neutron Scattering Studies of The Flux Line Lattice and Magnetic Ordering in TmNi 2 B 2 C....Pages 333-340 Observation of the Field-Driven Vortex Phase Transition in LuNi 2 B 2 C Single Crystals....Pages 341-346 Vortex Pinning and Dynamics in Magnetic and Non- Magnetic (RE)Ni 2 B 2 C Superconductors....Pages 347-356 Borocarbide Thin Films and Tunneling Measurements....Pages 357-362 Structural and Superconducting Properties of Rni 2 B 2 C Thin Films (R-Y, Ho)....Pages 363-368 C-Axis Oriented, In Plane Textured Borocarbides Thin Films Deposited By Pulsed Laser Deposition: Structure, Surface Morphology and Physical Properties....Pages 369-374 About the Coexistence of Two Phases in The Scni 2 B 2 C Borocarbide....Pages 375-378 Unconventional Superconductivity and Borocarbides....Pages 379-392 Eliashberg Analysis of the Physical Properties of Borocarbides....Pages 393-402 Aspects of Superconductivity in Borocarbides: Theoretical View of the Electronic Structure — A Comparison with Cuprates....Pages 403-412 Future Directions in Quaternary Borocarbide Superconductors....Pages 413-430 Progress in Borocarbide Research....Pages 431-434 Back Matter....Pages 435-445 The quaternary rare-earth transition-metal borocarbides are a new class of magnetic superconductors, discovered in 1994. The book contains a detailed description of the theoretical approaches used to explain the properties of these systems, with their intriguing array of magnetic and superconducting properties. The borocarbides are located in their context among the other magnetic or superconducting systems, especially the magnetic superconductors, and the book shows how our understanding has grown impressively due to the combination of a wide range of high quality samples and advanced measurement techniques. A number of important aspects nevertheless remain to be investigated, and these are outlined especially in the last part of the book. The workshop was called to encourage experimental and theoretical researchers to exchange information about the properties of the new class of magnetic superconductors, which are being studied in different countries using different methods. After introductions and overviews, the 46 papers explore the electronic structure and properties and phonon spectra, magnetic properties and crystalline electric field effects, the interplay between superconductivity and magnetism, the vortex lattice, and thin films and crystal structure. The final two summarize developments to date and suggest future research directions for quaternary borocarbide superconductors. c. Book News Inc After the revolutionary discovery of superconductivity in high Tc oxide materials (HTSC) by Bednorz and Muller in 1986 [1], discovery of superconductivity in intermetallic quaternary borocarbide [2-6] is a landmark in the field of superconductivity. Proceedings of the NATO Advanced Research Workshop, Dresden, Germany, June 13-18, 2000