# Growth and Domain Structures of Ba2YCu3O7-y Single Crystals

Kunihiko Hayashi, Madoka Tokumoto, Kazuhiro Takahashi, Yoshishige Suzuki, Keizo Murata, Hideo Ihara, Naoki Koshizuka, Yo-ichi Kimura

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9 Citations (Scopus)

## Abstract

Crystallographic and superconducting properties of single crystals of Ba2YCu3O7-y grown by the flux method are studied. The single crystals were superconductors in as-grown atates. Domain observation by an interference microscope revealed that there were a few kinds of single crystals with a single domain and a few with several domains. A single-domain crystal had a tetragonal structure and a $T_{\text{c}}$ onset of ${\sim}45$ K while a multidomain crystal had an orthorhombic structure and a $T_{\text{c}}$ onset of ${\sim}95$ K. The latter crystal with no twins had several rectangular shape domains. It is thought that long one-dimensional chains of oxygens with a few 100 $\mu$m in length were realized in each domain of the crystal. The reason for the appearance of such domain structures is discussed.
Original language English L1646-L1649 Japanese Journal of Applied Physics, Part 2: Letters 27 9 https://doi.org/10.1143/JJAP.27.L1646 Published - Sep 20 1988

## All Science Journal Classification (ASJC) codes

• Materials Science(all)
• Physics and Astronomy(all)
• Chemistry(all)

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