Growth of epitaxial MgB2 thick films with columnar structures by using HPCVD

Won Kyung Seong; Ji Young Huh; Won Nam Kang; Jeong Woon Kim; Yong Seung Kwon; Nam Keun Yang; Je Geun Park

doi:10.1002/cvde.200706636

Growth of epitaxial MgB₂ thick films with columnar structures by using HPCVD

Won Kyung Seong, Ji Young Huh, Won Nam Kang, Jeong Woon Kim, Yong Seung Kwon, Nam Keun Yang, Je Geun Park

Department of Physics and Chemistry

Sungkyunkwan University

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

Epitaxial MgB₂ thick films are grown on Al₂O ₃ substrates at 600°C by using the hybrid physical (HP)CVD technique. In order to obtain a high magnesium vapor pressure around the substrates, we use a special susceptor having a susceptor cap and achieve a very high growth rate of 0.17 μm min^-1. Hexagonal-shaped columnar structures are observed by cross-sectional and planar-view transmission electron microscope (TEM) images. For the 1.7 μm thick film, the T_c is observed to be 40.5 K with a J_c of 1.5 × 10⁶ A cm^-2 at 30 K. The vortex pinning mechanism by intercolumnar boundaries will be discussed.

Original language	English
Pages (from-to)	680-683
Number of pages	4
Journal	Chemical Vapor Deposition
Volume	13
Issue number	12
DOIs	https://doi.org/10.1002/cvde.200706636
State	Published - Dec 2007

Keywords

Columnar grains
Critical current
HPCVD
MgB thick film
TEM

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10.1002/cvde.200706636

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title = "Growth of epitaxial MgB2 thick films with columnar structures by using HPCVD",

abstract = "Epitaxial MgB2 thick films are grown on Al2O 3 substrates at 600°C by using the hybrid physical (HP)CVD technique. In order to obtain a high magnesium vapor pressure around the substrates, we use a special susceptor having a susceptor cap and achieve a very high growth rate of 0.17 μm min-1. Hexagonal-shaped columnar structures are observed by cross-sectional and planar-view transmission electron microscope (TEM) images. For the 1.7 μm thick film, the Tc is observed to be 40.5 K with a Jc of 1.5 × 106 A cm-2 at 30 K. The vortex pinning mechanism by intercolumnar boundaries will be discussed.",

keywords = "Columnar grains, Critical current, HPCVD, MgB thick film, TEM",

author = "Seong, {Won Kyung} and Huh, {Ji Young} and Kang, {Won Nam} and Kim, {Jeong Woon} and Kwon, {Yong Seung} and Yang, {Nam Keun} and Park, {Je Geun}",

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T1 - Growth of epitaxial MgB2 thick films with columnar structures by using HPCVD

AU - Seong, Won Kyung

AU - Huh, Ji Young

AU - Kang, Won Nam

AU - Kim, Jeong Woon

AU - Kwon, Yong Seung

AU - Yang, Nam Keun

AU - Park, Je Geun

PY - 2007/12

Y1 - 2007/12

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AB - Epitaxial MgB2 thick films are grown on Al2O 3 substrates at 600°C by using the hybrid physical (HP)CVD technique. In order to obtain a high magnesium vapor pressure around the substrates, we use a special susceptor having a susceptor cap and achieve a very high growth rate of 0.17 μm min-1. Hexagonal-shaped columnar structures are observed by cross-sectional and planar-view transmission electron microscope (TEM) images. For the 1.7 μm thick film, the Tc is observed to be 40.5 K with a Jc of 1.5 × 106 A cm-2 at 30 K. The vortex pinning mechanism by intercolumnar boundaries will be discussed.

KW - Columnar grains

KW - Critical current

KW - HPCVD

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KW - TEM

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Growth of epitaxial MgB₂ thick films with columnar structures by using HPCVD

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Keywords

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