2003年9月25日
磁気顕微鏡による磁束観測
低温工学
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- 巻
- 38
- 号
- 9
- 開始ページ
- 485
- 終了ページ
- 492
- 記述言語
- 日本語
- 掲載種別
- DOI
- 10.2221/jcsj.38.485
- 出版者・発行元
- 公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
Recently, vortices confined into micro-scale superconductors with shapes like a disk, triangle, square, etc., have attracted much attention because of the quantum phase transition of the self-organized vortex arrangement occurring within such geometrical constraints. Such a transition can be observed using a scanning SQUID microscope with high spatial resolution. We have successfully improved spatial resolution by incorporating a microfabrication technique that reduces both the size of the pick-up coil of the micro DC-SQUID and the standoff distance between the pick-up coil and the sample surface. Using this microscope, we have studied vortex arrangements in micro-scale superconductors made of Nb and YBa2Cu3O7−δ films with various sizes and geometrical shapes. A peculiar oscillating behavior of diamagnetic magnetization corresponding to the particular vortex state was observed.
- リンク情報
- ID情報
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- DOI : 10.2221/jcsj.38.485
- ISSN : 0389-2441
- CiNii Articles ID : 10011371316
- CiNii Books ID : AN00333419
- identifiers.cinii_nr_id : 9000003211921