2004/06/04 by Yoshihiko Takano, Y. Takano, M. Nagao +12 · 1 citation
Materials Science · Physics and Astronomy · #Diamond and Carbon-based Materials Research #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1063/1.1802389
published as Appl. Phys. Lett. 85, 2851 (2004) · 6 pages, 3 figures
arxiv created 2004/06/04 · openalex publication_date 2004/10/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report unambiguous evidence for superconductivity in a heavily boron-doped diamond thin film grown by microwave plasma-assisted chemical vapor deposition (MPCVD). An advantage of the MPCVD-deposited diamond is that it can contain boron at high concentration, especially in (111)-oriented films. Superconducting transition temperatures are determined by transport measurements to be 7.4 K for TC onset and 4.2 K for zero resistance. The upper critical field is estimated to be 7 T. Magnetization as a function of magnetic fields shows typical type-II superconducting properties.