Lowered Tc of YBa2(Cu,Zn)3O7-δ by homogenizing procedure and annealing treatments

S. Adachi; C. Kasai; S. Tajima; K. Tanabe; S. Fujihara; T. Kimura

doi:10.1016/S0921-4534(00)01648-8

Lowered T_c of YBa₂(Cu,Zn)₃O_7-δ by homogenizing procedure and annealing treatments

S. Adachi, C. Kasai, S. Tajima, K. Tanabe, S. Fujihara, T. Kimura

応用化学科

研究成果: Article › 査読

23 被引用数 (Scopus)

抄録

The effects of the homogenizing procedure and annealing treatment on superconducting transition temperature, T_c, were investigated for Zn-substituted YBa₂Cu₃O_7-δ. Samples of YBa₂Cu_3-xZn_xO_7-δ (x = 0.00, 0.02, 0.05 and 0.10) were prepared under different conditions. It was found that additional pulverization and re-sintering lower T_c in Zn-substituted samples. Moreover, annealing in reduced atmosphere prior to the final oxygenation further decreases T_c, resulting in the lowest value (T_c = 46 K for x = 0.10) among T_c's ever reported for Zn-substituted YBa₂Cu₃O_7-δ. This suggests that Zn at the Cu-O chain site moves to the CuO₂ plane by annealing samples in reduced atmosphere. Comparison of T_c-suppression effects by Zn and Ni is also discussed.

本文言語	English
ページ（範囲）	323-328
ページ数	6
ジャーナル	Physica C: Superconductivity and its applications
巻	351
号	4
DOI	https://doi.org/10.1016/S0921-4534(00)01648-8
出版ステータス	Published - 2001 4月 15

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学
エネルギー工学および電力技術
電子工学および電気工学

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10.1016/S0921-4534(00)01648-8

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引用スタイル

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title = "Lowered Tc of YBa2(Cu,Zn)3O7-δ by homogenizing procedure and annealing treatments",

abstract = "The effects of the homogenizing procedure and annealing treatment on superconducting transition temperature, Tc, were investigated for Zn-substituted YBa2Cu3O7-δ. Samples of YBa2Cu3-xZnxO7-δ (x = 0.00, 0.02, 0.05 and 0.10) were prepared under different conditions. It was found that additional pulverization and re-sintering lower Tc in Zn-substituted samples. Moreover, annealing in reduced atmosphere prior to the final oxygenation further decreases Tc, resulting in the lowest value (Tc = 46 K for x = 0.10) among Tc's ever reported for Zn-substituted YBa2Cu3O7-δ. This suggests that Zn at the Cu-O chain site moves to the CuO2 plane by annealing samples in reduced atmosphere. Comparison of Tc-suppression effects by Zn and Ni is also discussed.",

keywords = "Annealing, Homogeneity, Impurity effect, Iodometry, Substitution, T-suppression, YBaCuO, Zn-doping",

author = "S. Adachi and C. Kasai and S. Tajima and K. Tanabe and S. Fujihara and T. Kimura",

note = "Funding Information: The authors are grateful to Y. Itoh and T. Machi of SRL-ISTEC for valuable discussions. This work was supported by New Energy and Industrial Technology Development Organization (NEDO) as a part of its Research and Development of Fundamental Technologies for Superconductor Applications Project under the New Sunshine Program administrated by the Agency of Industrial Science and Technologies MITI of Japan.",

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T1 - Lowered Tc of YBa2(Cu,Zn)3O7-δ by homogenizing procedure and annealing treatments

AU - Adachi, S.

AU - Kasai, C.

AU - Tajima, S.

AU - Tanabe, K.

AU - Fujihara, S.

AU - Kimura, T.

N1 - Funding Information: The authors are grateful to Y. Itoh and T. Machi of SRL-ISTEC for valuable discussions. This work was supported by New Energy and Industrial Technology Development Organization (NEDO) as a part of its Research and Development of Fundamental Technologies for Superconductor Applications Project under the New Sunshine Program administrated by the Agency of Industrial Science and Technologies MITI of Japan.

PY - 2001/4/15

Y1 - 2001/4/15

N2 - The effects of the homogenizing procedure and annealing treatment on superconducting transition temperature, Tc, were investigated for Zn-substituted YBa2Cu3O7-δ. Samples of YBa2Cu3-xZnxO7-δ (x = 0.00, 0.02, 0.05 and 0.10) were prepared under different conditions. It was found that additional pulverization and re-sintering lower Tc in Zn-substituted samples. Moreover, annealing in reduced atmosphere prior to the final oxygenation further decreases Tc, resulting in the lowest value (Tc = 46 K for x = 0.10) among Tc's ever reported for Zn-substituted YBa2Cu3O7-δ. This suggests that Zn at the Cu-O chain site moves to the CuO2 plane by annealing samples in reduced atmosphere. Comparison of Tc-suppression effects by Zn and Ni is also discussed.

AB - The effects of the homogenizing procedure and annealing treatment on superconducting transition temperature, Tc, were investigated for Zn-substituted YBa2Cu3O7-δ. Samples of YBa2Cu3-xZnxO7-δ (x = 0.00, 0.02, 0.05 and 0.10) were prepared under different conditions. It was found that additional pulverization and re-sintering lower Tc in Zn-substituted samples. Moreover, annealing in reduced atmosphere prior to the final oxygenation further decreases Tc, resulting in the lowest value (Tc = 46 K for x = 0.10) among Tc's ever reported for Zn-substituted YBa2Cu3O7-δ. This suggests that Zn at the Cu-O chain site moves to the CuO2 plane by annealing samples in reduced atmosphere. Comparison of Tc-suppression effects by Zn and Ni is also discussed.

KW - Annealing

KW - Homogeneity

KW - Impurity effect

KW - Iodometry

KW - Substitution

KW - T-suppression

KW - YBaCuO

KW - Zn-doping

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