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Microwave surface resistance of MgB2.

Zhukov, A A*; Purnell, A*; Miyoshi, Y*; Bugoslavsky, Y*; Lockman, Z*; Berenov, A*; Zhai, H Y*; Christen, H M*; Paranthaman, M P*; Lowndes, D H*; Jo, M H*; Blamire, M G*; Hao, L; Gallop, J C; MacManus-Driscall, J L*; Cohen, L F* (2002) Microwave surface resistance of MgB2. Appl. Phys. Lett., 80 (13). pp. 2347-2349.

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The microwave power and frequency dependence of the surface resistance of MgB2 films and powder samples were studied. Sample quality is relatively easy to identify by the breakdown in the ² law for poor-quality samples at all temperatures. The performance of MgB2 at 10 GHz and 21 K was compared directly with that of high-quality YBCO films. The surface resistance of MgB2 was found to be approximately three times higher at low microwave power and showed an onset of nonlinearity at microwave surface fields ten times lower than the YBCO film. It is clear that MgB2 films are not yet optimized for microwave applications.

Item Type: Article
Subjects: Quantum Phenomena
Quantum Phenomena > Quantum Information Processing and Communication
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2288

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