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논문 기본 정보

자료유형
학술저널
저자정보
장석헌 (School of Advanced Materials Science and Engineering, Sungkyunkwan University) 임준형 (School of Advanced Materials Science and Engineering, Sungkyunkwan University) 윤경민 (School of Advanced Materials Science and Engineering, Sungkyunkwan University) 이승이 (School of Advanced Materials Science and Engineering, Sungkyunkwan University) 김규태 (School of Advanced Materials Science and Engineering, Sungkyunkwan University) 이창민 (School of Advanced Materials Science and Engineering, Sungkyunkwan University) 주진호 (School of Advanced Materials Science and Engineering, Sungkyunkwan University) 나완수 (School of Information and Computer Engineering, Sungkyunkwan University) 이희균 (The department of Electronic Engineering, Korea Polytechnic University) 홍계원 (The department of Electronic Engineering, Korea Polytechnic University)
저널정보
한국초전도학회 Progress in superconductivity Progress in superconductivity 제8권 제1호
발행연도
2006.1
수록면
65 - 70 (6page)

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초록· 키워드

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We fabricated $YBa_2Cu_33O_{7-x}$(YBCO) films on(00l) $LaAlO_3$ substrates prepared by metal organic deposition(MOD) method using trifluoroacetate(TFA) solution and evaluated the effects of the humidity on the microstructure, phase purity, and critical properties. The films calcined at $430^{\circ}C$ were fired at $775^{\circ}C$ at 0%, 4.2%, 12.1%, and 20.0% humidified As gas mixed with 0.1% $O_2$. We observed that the amount of $BaF_2$ phase was effectively reduced and that a sharp and strong biaxial texture formed under a humidified atmosphere, leading to increased critical properties. For the films fired at 0% humidity, the $T_c\;and\;I_c$ were undetectably small. When the humidity was increased to 4.2%, the corresponding $T_c$(onset) and $I_c$ were increased to 90.5 K and 8 A/cm-width, respectively. For the films at the humidity range of 12.1-20.0%, the $I_c$ was found to be 35 A/cm-width. According to the results of the XRD, pole-figure, and SEM, these improved critical properties are probably attributed to the formation of a purer YBCO phase, larger grain size, and stronger c-axis orientation.

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