The A15 phases (also known as β-W or Cr3Si structure types) are series of intermetallic compounds with the chemical formula A3B (where A is a transition metal and B can be any element) and a specific structure. The A15 phase is also one of the members in the Frank–Kasper phases family.[1] Many of these compounds have superconductivity at around 20 K (−253 °C; −424 °F), which is comparatively high, and remain superconductive in magnetic fields of tens of teslas (hundreds of kilogauss). This kind of superconductivity (Type-II superconductivity) is an important area of study as it has several practical applications.
- ^ Frank, F. C.; Kasper, J. S. (1959-07-10). "Complex alloy structures regarded as sphere packings. II. Analysis and classification of representative structures". Acta Crystallographica. 12 (7): 483–499. Bibcode:1959AcCry..12..483F. doi:10.1107/S0365110X59001499. ISSN 0365-110X.