저온주사 레이저-홀소자 현미경을 이용한 YBCO 선재의 국소적 특성 시각화 연구: Visualization of the local superconducting properties in a YBCO coated conductor with striation using low temperature scanning laser Hall probe microscopy

by Hee Yeon Park (MS Candidate)

Monday Nov 12, 2012, 3:30 PM → 4:00 PM Asia/Seoul

216-1호 (제1과학관)

It is significant to measure and visualize local transition critical temperature and critical current density of

YBCO coated conductor rather than a rough average value of the entire through a nondestructive way. In this study, local physical properties such as superconducting transition critical temperature and critical current density in YBCO coated conductors are measured using Low Temperature Scanning Laser Hall Probe Microscopy (LTSLHPM) near the superconducting transition. In particular, we transformed shape of sample with striation and compared single bridge type of sample with two bridge type to reduce hysteresis and ac losses. As a result, there were no differences of superconducting properties within the margin of error and it is in stark contrast to the one bridge type of GdBCO sample. So it is expected to reduce the ac loss by patterning the sample.

Thesis Advisor: Prof. Hyeong-Cheol Ri