Temperature Dependence of Half Flux Quantum in YBa2Cu3O7−y Tricrystal Thin Film Observed by Scanning SQUID Microscopy

Physica C: Superconductivity 367 巻 1-4 号 28-32 頁 2002-02-15 発行
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タイトル ( eng )
Temperature Dependence of Half Flux Quantum in YBa2Cu3O7−y Tricrystal Thin Film Observed by Scanning SQUID Microscopy
作成者
Yamaguchi Tetsuji
Iguchi Ienari
収録物名
Physica C: Superconductivity
367
1-4
開始ページ 28
終了ページ 32
抄録
One of the most important topics in high critical temperature superconductors is the symmetry of order parameter. The most powerful and direct method to show the evidence of d-wave symmetry is the measurement of the half flux quantum at the tricrystal boundary of a superconducting thin film. We present the observation of the half flux quantum in a YBa2Cu3O7−y thin film on a SrTiO3 tricrystal substrate by using a scanning SQUID microscope (SSM). The SSM observation is done from 3 to 90 K. The vortex at the tricrystal point corresponds to Φ0∫2(=1.03×10^-15Wb) and this half vortex is observable up to near the critical temperature. The results indicate the evidence of dx2−y2 symmetry of the superconducting order parameter. Josephson vortices at grain boundaries are also observable and some of them are mobile with increasing the temperature.
著者キーワード
Scanning SQUID microscope
half vortex
d-Wave pairing symmetry
内容記述
This work has been supported by Core Research for Evolutional Science and Technology (CREST) of the Japan Science and Technology Corporation (JST).
NDC分類
物理学 [ 420 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
Elsevier Science B.V.
発行日 2002-02-15
権利情報
Copyright (c) 2002. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
出版タイプ Author’s Original(十分な品質であるとして、著者から正式な査読に提出される版)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0921-4534
[NCID] AA11461984
[DOI] 10.1016/S0921-4534(01)00982-0
[DOI] https://doi.org/10.1016/S0921-4534(01)00982-0