서지주요정보
배향성 있는 Ni 튜브와 원통형 YSZ 단결정 위에 성장시킨 YBCO 박막의 성장과 초전도특성 = Textured growth and high-$T_C$ superconducting properties of YBCO film on a cylindrical YSZ single crystal and a textured Ni tube
서명 / 저자 배향성 있는 Ni 튜브와 원통형 YSZ 단결정 위에 성장시킨 YBCO 박막의 성장과 초전도특성 = Textured growth and high-$T_C$ superconducting properties of YBCO film on a cylindrical YSZ single crystal and a textured Ni tube / 구두훈.
저자명 구두훈 ; Goo, Doo-Hoon
발행사항 [대전 : 한국과학기술원, 1999].
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소장정보

등록번호

8010029

소장위치/청구기호

학술문화관(문화관) 보존서고

DPH 99008

SMS전송

도서상태

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초록정보

Growth and superconducting properties of YBCO $(Y_1Ba_2Cu_3O_{7-x}) film on a YSZ single crystal cylinder and a Ni ring were studied. Aim of this study is that how and how much the YBCO film on a cylinder and a Ni tube can shields magnetic field. High current can flow if grains of YBCO film are well aligned. For the high current application of YBCO films, ab-axes of YBCO film should be aligned within 10°, which can be established by controlling bufferlayer thickness on YSZ and texturing a Ni substrate. First, we deposited YBCO on a [001] tilt YSZ plat substrate and found that the optimum thickness of bufferlayer is about 15Å. We could control the growth direction and in-plane texture of YBCO film. In low deposition temperature and thick $CeO_2$ bufferlayer YBCO grew parallel to the direction of the tilt substrate axis, and in high deposition temperature and thin think $CeO_2$ (less than 15Å) bufferlater YBCO grew normal to the substrate surface. Second, we have c-axis normal and well textured YBCO film grown on a curved YSZ substrate, of which [001] axes are continuously inclined, which is confirmed by XRD 2θ,φ-scan measurement. Third, we applied this technique to YSZ single crystalline cylinder. we measured the trapped field of 0.06 Gauss at 77K. the critical density is about $10^4A$/cm^2. Finally, a textured Ni tape was used as a substrate. In general, polycrystalline film on a polycrystal substrate, and textured film can grow on a textured substate. We textured Ni by rolling and annealing, on which YBCO film grew textured. Ni tapes were bonded to the shape of a ring and buffered by $CeO_2/YSZ/CeO_2$ layers. Then YBCO deposited on it. The shielded field was measured by the Hall probe putted in the center of the ring. When magnetic field was applied, the ring show the hysteric behavior. And the cirtical current density of a ring is about $10^4A$/㎠. When the external current pulse, 0.6A, was applied, the ring showed a nonlinear response, which will be studied in the future.

서지기타정보

서지기타정보
청구기호 {DPH 99008
형태사항 v, 136 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Doo-Hoon Goo
지도교수의 한글표기 : 염도준
지도교수의 영문표기 : Do-Jun Youm
수록 잡지명 : "Diffusion bonding of the textured Ni tapes for the substrate of YBCO coated conductors". Physica C. Elsevier Science B. V., vol. 305, pp. 221-226 (1998)
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 133-136
주제 와이비씨오
배향된
롤링
접합
초전도체
차폐
YBCO
Textured
Rolling
Bonding
Superconductor
Shield
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