MgO platelets and high critical field in MgB2 thin films doped with carbon from methane

Ye Zhu, F. Hunte, C. G. Zhuang, Q. R. Feng, Z. Z. Gan, X. X. Xi, D. C. Larbalestier, P. M. Voyles

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

We report that C-doped MgB2 thin films deposited by hybrid physical-chemical vapor deposition (HPCVD) using CH4 as the carbon source have Hc2(0K)∼60T, similar to that of HPCVD films obtained using (MeCp)2Mg for the carbon. Using transmission electron microscopy, we show that in the films doped using CH4 there is a MgB2C2 layer on top of the MgB2 film, which does not degrade the MgB2 connectivity or Jc. We also find a high density of coherent MgO nanoplatelets in the MgB2 which create strain fields which may give rise to strong π-band scattering and the very high Hc2.
Original languageEnglish
Article number125001
JournalSuperconductor Science and Technology
Volume22
Issue number12
DOIs
Publication statusPublished - 25 Nov 2009
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry
  • Electrical and Electronic Engineering

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