TY - JOUR
T1 - Spatial inhomogeneities of Gd-Ba-Cu-O bulk superconductors evaluated by different Hall probe scanning methods
AU - Kono, Takeshi
AU - Sakai, Naomichi
AU - Nariki, Shinya
AU - Hirabayashi, Izumi
AU - Murakami, Masato
AU - Koshizuka, Naoki
N1 - Funding Information:
Manuscript received October 4, 2004. This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) and by Iwate Industrial Promotion Center. T. Kono and N. Koshizuka are with Superconductivity Research Laboratory, International Superconductivity Technology Center, Iwate, Japan (e-mail: kono@istec.or.jp). N. Sakai, S. Nariki, and I. Hirabayashi are with Superconductivity Research Laboratory, International Superconductivity Technology Center, Tokyo, Japan. M. Murakami is with Department of Materials Science and Engineering, Shibaura Institute of Technology, Tokyo, Japan. Digital Object Identifier 10.1109/TASC.2005.849379
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/6
Y1 - 2005/6
N2 - We studied spatial inhomogeneities of Gd-Ba-Cu-O bulk superconductors by using two different types of Hall probe scanning methods. One is a conventional scanning Hall probe (SHP) method, which can measure the trapped flux density distribution of superconductors after magnetized by external fields. The other is a recently developed magneto-scan method, which scans a Hall probe together with a permanent magnet and can detect shielding behavior of the sample surface without applying an external field. In the SHP method, the flux density distributions obtained by the field cooling (FC) scan were compared with those in the zero field cooling (ZFC) scan. It was found that the ZFC scan can acquire much more information on the sample inhomogeneity than the FC scan. The magneto-scan method was also adopted to the characterization of the same sample. It was found that this method was more sensitive than the SHP method, and allowed us to clearly detect some degradations in the vicinity of the seed crystal in the sample surface.
AB - We studied spatial inhomogeneities of Gd-Ba-Cu-O bulk superconductors by using two different types of Hall probe scanning methods. One is a conventional scanning Hall probe (SHP) method, which can measure the trapped flux density distribution of superconductors after magnetized by external fields. The other is a recently developed magneto-scan method, which scans a Hall probe together with a permanent magnet and can detect shielding behavior of the sample surface without applying an external field. In the SHP method, the flux density distributions obtained by the field cooling (FC) scan were compared with those in the zero field cooling (ZFC) scan. It was found that the ZFC scan can acquire much more information on the sample inhomogeneity than the FC scan. The magneto-scan method was also adopted to the characterization of the same sample. It was found that this method was more sensitive than the SHP method, and allowed us to clearly detect some degradations in the vicinity of the seed crystal in the sample surface.
KW - Gadolinium compounds
KW - Magnetic field measurement
KW - Magnetic variable measurement
KW - Superconducting materials measurements
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U2 - 10.1109/TASC.2005.849379
DO - 10.1109/TASC.2005.849379
M3 - Article
AN - SCOPUS:22044440472
SN - 1051-8223
VL - 15
SP - 3640
EP - 3643
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2 PART III
ER -