서지주요정보
YBCO 초전도체 증착을 위한 [001]-축이 기울어진 Ni 테이프 제작과 초전도 특성에 관한 연구 = Study on the fabrication of Ni tapes with tilted [001]-axes for deposition of YBCO and its superconducting properties
서명 / 저자 YBCO 초전도체 증착을 위한 [001]-축이 기울어진 Ni 테이프 제작과 초전도 특성에 관한 연구 = Study on the fabrication of Ni tapes with tilted [001]-axes for deposition of YBCO and its superconducting properties / 이재승.
저자명 이재승 ; Lee, Jai-Son
발행사항 [대전 : 한국과학기술원, 2000].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8010656

소장위치/청구기호

학술문화관(문화관) 보존서고

MPH 00006

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초록정보

We made Ni tapes with tilted [001]-axes for the deposition of YBCO. We called them RATS(Rolling Assisted Textured Substrates). RATS were totally different from RABiTS(Rolling Assisted Textured Substrates). RATS were made by rolling and annealing of high purity Ni and especially, methods of locally electrical spot welding and partial annealing of moving Ni tapes. RATS had [001]-axes tilted around rolling direction and [100]-axes paralled to the rolling direction. We compared RATS and RABiTS by XRD measurement. The Crystalline textures of RATS were better than those of RABiTS. And RATS were single crystal. The average grain size of RATS was 10㎠. We deposited buffer layers on RATS by e-beam evaporation. The structures of buffer layers were $CeO_2$/YSZ/$CeO_2$ and YSZ/$CeO_2$. The crystalline textures of buffer layers were very good and [001]-axes of buffer layer tilted by degree of those of RATS. Then, we deposited YBCO by methods of magnetron sputtering and thermal coevaporation. The c-axes of YBCO layers on YSZ/$CeO_2$ grew normally to the surface and on $CeO_2$/YSZ/$CeO_2$ grew tilted. The crystalline textures of YBCO layers were very good too. We measured the critical temperature($T_c$) and the critical current density($J_c$) by 4 probe method. $T_c$ was 84K and $J_c$ was $1.4 \times 10^5A/cm^2$ at 77K. $J_c$ had anisotropic properties to the rolling direction and the perpendicular to the rolling direction.

서지기타정보

서지기타정보
청구기호 {MPH 00006
형태사항 vii, 72 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jai-Son Lee
지도교수의 한글표기 : 염도준
지도교수의 영문표기 : Do-Jun Youm
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 71-72
주제 광발광
갈륨비소
규소
배위좌표
많은 도핑
Photoluminescence
GaAs
Si
Configuration coordinate
High doping
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