A review on the understanding and fabrication advancement of MgB2 thin and thick films by HPCVD

Abstract

MgB2 thin films with superior superconducting properties are very promising for superconducting magnets, electronic devices and coated conductor electric power applications. A clear understanding of flux pinning mechanism in MgB2films could be a big aid in improving the performance of MgB2by the enhancement of Jc. The fabrication advancement and the understanding of flux pinning mechanism of MgB2thin and thick films fabricated by using hybrid physical-chemical vapor deposition (HPCVD) are reviewed. The distinct kind of MgB2films, such as single-crystal like MgB2 thin films, MgB2epitaxial columnar thick films, and a-axis-oriented MgB2films are included for flux pinning mechanism investigation. Various attempts made by researchers to improve further the flux pinning property and Jc performance by means of doping in MgB2thin films by using HPCVD are also summarized.