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

doi:10.1088/0953-2048/22/12/125001

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 publication › Journal article › Academic research › peer-review

12 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 language	English
Article number	125001
Journal	Superconductor Science and Technology
Volume	22
Issue number	12
DOIs	https://doi.org/10.1088/0953-2048/22/12/125001
Publication status	Published - 25 Nov 2009
Externally published	Yes

ASJC Scopus subject areas

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

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10.1088/0953-2048/22/12/125001

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title = "MgO platelets and high critical field in MgB2 thin films doped with carbon from methane",

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.",

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T1 - MgO platelets and high critical field in MgB2 thin films doped with carbon from methane

AU - Zhu, Ye

AU - Hunte, F.

AU - Zhuang, C. G.

AU - Feng, Q. R.

AU - Gan, Z. Z.

AU - Xi, X. X.

AU - Larbalestier, D. C.

AU - Voyles, P. M.

PY - 2009/11/25

Y1 - 2009/11/25

N2 - 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.

AB - 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.

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U2 - 10.1088/0953-2048/22/12/125001

DO - 10.1088/0953-2048/22/12/125001

M3 - Journal article

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JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

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ER -

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

Abstract

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