Synchrotron radiation x-ray photoemission spectroscopy and high-resolution transmission electron microscopy analysis of Bi2Sr2Can−1CunOy superconducting whiskers with high critical current density

Using synchrotron radiation x-ray photoemission spectroscopy and high-resolution transmission electron microscopy, we have studied Ca-rich Bi-based superconducting whiskers grown by an Al2O3-seeded glassy quenched platelet method. The Ca-rich Bi-based superconducting whiskers show a high critical cu...

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Bibliographic Details
Published in:Journal of applied physics 2009-10, Vol.106 (8)
Main Authors: Tanaka, Hiromi, Yoshikawa, Hideki, Ueda, Shigenori, Tsuruta, Chusei, Matsui, Yoshio, Ishigaki, Tatsuya, Honda, Syuhei, Kishida, Satoru
Format: Article
Language:English
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Summary:Using synchrotron radiation x-ray photoemission spectroscopy and high-resolution transmission electron microscopy, we have studied Ca-rich Bi-based superconducting whiskers grown by an Al2O3-seeded glassy quenched platelet method. The Ca-rich Bi-based superconducting whiskers show a high critical current density of 2×105 A/cm2 at 40 K in self-field. We found that excess Ca2+ ions substitute for the Sr2+ sites and cause pillar-shaped nanocrystalline domains with shorter period modulation embedded in the base crystalline. The embedded nanocrystalline domains can result in structural distorted defects which work as strong pinning center.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3246804