期刊
APPLIED PHYSICS LETTERS
卷 85, 期 14, 页码 2851-2853出版社
AMER INST PHYSICS
DOI: 10.1063/1.1802389
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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 T-C 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. (C) 2004 American Institute of Physics.
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