Development of A New Method for Measuring the Oxygen Content of the Oxide Superconductor YBa₂Cu₃O_<i>y</i> with a Dissolved Oxygen Sensor

• Suzuki Takehiro

  Yamagata University, Graduate School of Science and Engineering, Material Chemical Engineering

• Shimabukuro Yoshihito

  Yamagata University, Graduate School of Science and Engineering, Material Chemical Engineering

• Kambe Shiro

  Yamagata University, Graduate School of Science and Engineering, Material Chemical Engineering

抄録

  For cuprate superconductors, the Cu valency is a determining factor of the superconducting transition temperature (T_c). The Cu valence (v) of the superconductor YBa₂Cu₃O_y (YBCO) has been calculated from oxygen content (y) by the charge neutralization rule. The conventional methods for measuring the oxygen content are iodometry and coulometry. Recently, we developed a novel oxygen measuring method for La_2-xSr_xCuO₄ that uses a dissolved oxygen sensor (the DO method). In this study, we examine whether the oxygen content of YBa₂Cu₃O_y can be determined by the DO method. The y value obtained by the DO method was compared with that obtained by the iodometric method. In addition, we developed a new correction method by applying the diffusion equation. After correction, the errors of v and y fit within 0.026 and 0.039, respectively. We found that DO method is effective for measuring the oxygen content of YBCO after correction.

収録刊行物

• Transactions of the Materials Research Society of Japan

  Transactions of the Materials Research Society of Japan 45 (2), 49-54, 2020-04-01

  一般社団法人 日本MRS

キーワード

• Superconductor
• YBCO
• Oxygen content
• Dissolved oxygen

詳細情報

• CRID: 1390565134844205696
• NII論文ID: 130007826048
• DOI: 10.14723/tmrsj.45.49
• ISSN: 21881650
• ISSN: 13823469
• Web Site: https://www.jstage.jst.go.jp/article/tmrsj/45/2/45_49/_pdf
• 本文言語コード: en
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