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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2007.1
- 수록면
- 5 - 10 (6page)
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We prepared four different $MgB_2$ films on $Al_2O_3$ by hybrid physical chemical vapor deposition method with thicknesses ranging from $0.65\;{\mu}m$ to $1.2\;{\mu}m$. X-ray diffraction patterns confirm that all the $MgB_2$ films are c-axis oriented perpendicular to $Al_2O_3$ substrates. The superconducting onset temperature of $MgB_2$ films were between 39.39K and 40.72K. The residual resistivity ratio of the $MgB_2$ films was in the range between 3.13 and 37.3. We measured the angle dependence of critical current density ($J_c$) and resistivity, and determined the upper critical field ($H_{c2}$) from the temperature dependence of the resistivity curves. The anisotropy ratios defined as the ratio of the $H_{c2}$ parallel to the ab-plane to that perpendicular to the ab-plane were in the range of 2.13 to 4.5 and were increased as the temperature was decreased. Some samples showed increase of $J_c$ and decrease of resistivity when a magnetic field in applied parallel to the c-axis. We interpret this angle dependence in terms of enhanced flux pinning due to columnar growth of $MgB_2$ along the c-axis.
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In-situ Growth of $MgB_2$ Thin Film by Hybrid Physical-Chemical Vapor Deposition
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Superconducting Properties of $MgB_2$ Bulk Formed by $MgB_4$ + Mg Mixtures
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Mixed-state Hall effect of $MgB_2$ thin films
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혼성물리화학기상 증착법으로 여러가지 불순물층 위에 제조한 $MgB_2$ 박막에 대한 연구
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Influence of Deposition Rate on $MgB_2$ Thin Films Grown by Co-evaporation Method
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Growth of Superconducting $MgB_2$ Fibers by a Diffusion Method
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Fabrication of $MgB_2$ Thick Films on Various Buffer Layers by Using Hybrid Physical-chemical Vapor Deposition Method
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T and J distribution in in situ processed MgB bulk superconductors with/without C doping
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Growth of superconducting $MgB_2$ fibers for wire applications
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Temperature and Magnetic Field Dependent Optical Properties of Superconducting MgB$_{2}$ Thin Film
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분말압연 공정에 의한 $MgB_2$ 판재 제조
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Single Crystal Like $MgB_2$ Thin Film Grown by HPCVD
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Effect of Post-annealing Temperatures on MgB$_{2}$ Thin Films
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MgB₂ 초전도 선재의 물리적 특성에 관한 연구
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Origin of High Critical Current Density in MgB$_{2}$ Thin Films
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