저온주사홀소자현미경 (LTSHPM)을 이용한 YBCO 초전도 선재의 자기적 특성과 전류 분포 = Measurement of the Magnetic Flux in a Thin YBCO-coated Conductor and of the Current Distribution by Using a Low-temperature Scanning Hall Probe Microscope (LTSHPM)

다국어 초록 (Multilingual Abstract)

A low-temperature scanning Hall probe microscope was used to map the distribution of magnetic flux in YBCO strips carrying transport currents at 80 K. Both shielded and trapped field profile were studied as functions of the transport current. We scanned YBCO-coated conductors by using both the 2D and the 1D methods. The results of Hall probe magnetic measurements were used in an inversion calculation to obtain the current distribution across the filaments. We are analyzed our data by using the critical state model to calculate the current distribution.

국문 초록 (Abstract)

저온주사홀소자현미경 (LTSHPM)을 이용하여 대면적의 YBCO 초전도 선재의자기적 특성을 1차원 및 2차원으로 조사하였다. 외부에서 가해준 전류 및온도 환경에 따른 자기장 변화를 관측하고, 그 결과를 바탕으로 역변환방법을 통한 전류의 공간적 분포를 분석하였다.

참고문헌 (Reference)

1 M. K Wu, JR, 58 : 908-, 1987

2 C. P. Bean, 8 : 250-, 1962

3 C. P. Bean, 36 : 31-, 1964

4 T. H. Johansen, 54 : 16264-, 1996

5 J. McDonald, 53 : 8643-, 1996

6 E. H. Brandt, 48 : 12893-, 1933

7 E, Zeldov, 49 : 9802-, 1994