Effective vortex pinning in MgB2 thin films

被引：9

作者：

Bugoslavsky, Y

Cowey, L

Tate, TJ

Perkins, GK

Moore, J

Lockman, Z

Berenov, A

MacManus-Driscoll, JL

Caplin, AD

Cohen, LF

Zhai, HY

Christen, HM

Paranthaman, MP

Lowndes, DH

Jo, MH

Blamire, MG

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Ctr High Temp Superconductiv, London SW7 2BZ, England

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37931 USA

[3] Univ Cambridge, Dept Mat Sci, Cambridge CB2 3QZ, England

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2002年 / 15卷 / 10期

关键词：

D O I：

10.1088/0953-2048/15/10/305

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We discuss the pinning properties of MgB2 thin films grown by pulsed-laser deposition (PLD) and by electron-beam (EB) evaporation. Two mechanisms are identified that contribute most effectively to the pinning of vortices in randomly oriented films. The EB process produces low defected crystallites with a small grain size providing enhanced pinning at grain boundaries without any degradation of T-C. The PLD process produces films with structural disorder on a scale less than the coherence length that further improves pinning, but also depresses T-C.

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页码：1392 / 1397

页数：6

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