Processing of β-W Type Structure Superconducting Compound Materials

AlPd15B7: a new superconducting cage-compound with an anti-Yb3Rh4Sn13-type of structure.

A new intermetallic compound AlPd15B7 was synthesized by arc-melting the stoichiometric mixture of the elements. Single crystal X-ray diffraction data of ternary metal-rich boride reveal a new type of structure with the space group Ia3d and the lattice parameter a = 16.4466(3) Å. It adopts a filled anti-Yb3Rh4Sn13-type structure, where the positions corresponding to 3Yb, 4Rh and 13Sn atoms are ...

“Electronic Structure of Novel Magnetic and Superconducting Materials”

Superconducting Materials for Magnets

Superconducting materials for magnets will be discussed from three viewpoints: firstly the basic physical properties of the materials themselves, secondly the constraints and preferences imposed by the requirements of magnet building and finally, the manufacture of magnet conductors as a commercial product.

Structure and evolution of low mass W UMa type systems

The structure and evolution of low-mass W UMa type contact binaries are discussed by employing Eggleton’s stellar evolution code (Eggleton 1971, 1972, 1973). Assuming that these systems completely satisfy Roche geometry, for contact binaries with every kind of mass ratios (0.02∼1.0), we calculate the relative radii (R1,2/A, where R1,2 are the radii of both stars, and A the orbital separation) o...

Critical Magnetic Field Determination of Superconducting Materials*

Abstract Using a 11.4 GHz, 50-MW, <1 μs, pulsed power source and a TE013-like mode copper cavity, we have been measuring critical magnetic fields of superconductors for accelerator cavity applications. This device can eliminate both thermal and field emission effects due to a short pulse and no electric field at the sample surface. A model of the system is presented in this paper along with a d...