Superconductivity in diamond thin films well above liquid helium temperature

被引：274

作者：

Takano, Y

Nagao, M

Sakaguchi, I

Tachiki, M

Hatano, T

Kobayashi, K

Umezawa, H

Kawarada, H

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Waseda Univ, Sch Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 14期

关键词：

D O I：

10.1063/1.1802389

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页码：2851 / 2853

页数：3

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