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

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	323-328
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	351
Issue number	4
DOIs	https://doi.org/10.1016/S0921-4534(00)01648-8
Publication status	Published - 2001 Apr 15

Keywords

Annealing
Homogeneity
Impurity effect
Iodometry
Substitution
T-suppression
YBaCuO
Zn-doping

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(00)01648-8

Cite this

@article{0e10575efbac4caf9d74b24e9333c25a,

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.",

year = "2001",

month = apr,

day = "15",

doi = "10.1016/S0921-4534(00)01648-8",

language = "English",

volume = "351",

pages = "323--328",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "4",

}

TY - JOUR

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

UR - http://www.scopus.com/inward/record.url?scp=0035871769&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035871769&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(00)01648-8

DO - 10.1016/S0921-4534(00)01648-8

M3 - Article

AN - SCOPUS:0035871769

SN - 0921-4534

VL - 351

SP - 323

EP - 328

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 4

ER -