Morphological Effects of Grinding on Bismuth-Based Cuprate Superconductors |
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| Authors: | Yoshihiro Kusano Jun Takada Minoru Fukuhara Akira Doi Yasunori Ikeda Mikio Takano |
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| Affiliation: | Department of Applied Art, College of the Arts, Kurashiki University of Science and the Arts, 2640 Nishinoura, Okayama 712, Japan;Department of Applied Chemistry, Faculty of Engineering, Okayama University, 3-1-1 Tsushima-naka, Okayama 700, Japan;Department of Applied Chemistry, Faculty of Engineering, Okayama University of Science, 1-1 Ridai-cho, Okayama 700, Japan;Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu 611, Japan |
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| Abstract: | Morphological changes of bismuth-based cuprate superconductors, such as the 2223 phase, via a small mechanical force were studied mainly by means of high-resolution transmission electron microscopy and atomic force microscopy. Even light mechanical grinding of the sintered 2223 samples led to the formation of superfine particles that had a width of ∼5 nm. Moreover, we found first that the superfine particles had a discrete thickness of odd numbers of a half unit length c /2 of the 2223 phase, e.g. 1.9 nm, 5.6 nm, and so on. The formation of the superfine particles was due to cleavage at Bi—O double layers that were bound weakly to each other in a unit cell. |
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