※ 기관로그인 시 무료 이용이 가능합니다.
※ 학술발표대회집, 워크숍 자료집 중 4페이지 이내 논문은 '요약'만 제공되는 경우가 있으니, 구매 전에 간행물명, 페이지 수 확인 부탁 드립니다.
4,000원
원문정보
초록
영어
The pure and carbon (C)-doped MgB2 thin films were fabricated on Al2O3 (0001) substrates at a temperature of 650 °C by using hot-filament-assisted hybrid physical–chemical vapor deposition technique. The Tc value for pure MgB2 film is 38.5 K, while it is between 30 and 35 K for carbon-doped MgB2 films. Expansion in c-axis lattice parameter was observed with increase in carbon doping concentration which is in contrast to carbon-doped MgB2 single crystals. Significant enhancement in the critical current density was obtained for C-doped MgB2 films as compared to the undoped MgB2 film. This enhancement is most probably due to the incorporation of C into MgB2 and the high density of grain boundaries, both help in the pinning of vortices and result in improved superconducting performance.