High pressure synthesis of Hg1223 superconductor under highly oxidizing atmosphere

N. Yoshida; S. Adachi; T. Tatsuki; T. Tamura; K. Tanabe; S. Fujihara; T. Kimura

doi:10.1016/S0955-2219(98)00479-8

High pressure synthesis of Hg1223 superconductor under highly oxidizing atmosphere

N. Yoshida, S. Adachi, T. Tatsuki, T. Tamura, K. Tanabe, S. Fujihara, T. Kimura

Department of Applied Chemistry

Research output: Contribution to journal › Article

2 Citations (Scopus)

Abstract

We tried to prepare the mercury-based superconductor, HgBa₂Ca₂Cu₃O_8+δ (Hg1223), under highly oxidizing atmosphere using a high pressure technique. Samples containing Hg1223 as the main phase with T_C=90-122K were obtained. CuO and a new phase were included in the samples as impurities. The a-axes of the samples were shorter than the values ever reported for Hg1223 with T_C=135K. These results suggest that our Hg1223 samples had excess hole concentrations, i.e. they are over-doped. The irreversibility field (B_irr) was measured for two samples with T_C=118 and 94K. They had almost the same normalized temperature (1-T/T_C) dependence of B_irr.

Original language	English
Pages (from-to)	1543-1546
Number of pages	4
Journal	Journal of the European Ceramic Society
Volume	19
Issue number	6-7
DOIs	https://doi.org/10.1016/S0955-2219(98)00479-8
Publication status	Published - 1999 Jun

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Keywords

High pressure synthesis
Magnetic properties
Oxide superconductors.
Superconductivity

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Cite this

Yoshida, N., Adachi, S., Tatsuki, T., Tamura, T., Tanabe, K., Fujihara, S., & Kimura, T. (1999). High pressure synthesis of Hg1223 superconductor under highly oxidizing atmosphere. Journal of the European Ceramic Society, 19(6-7), 1543-1546. https://doi.org/10.1016/S0955-2219(98)00479-8

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abstract = "We tried to prepare the mercury-based superconductor, HgBa2Ca2Cu3O8+δ (Hg1223), under highly oxidizing atmosphere using a high pressure technique. Samples containing Hg1223 as the main phase with TC=90-122K were obtained. CuO and a new phase were included in the samples as impurities. The a-axes of the samples were shorter than the values ever reported for Hg1223 with TC=135K. These results suggest that our Hg1223 samples had excess hole concentrations, i.e. they are over-doped. The irreversibility field (Birr) was measured for two samples with TC=118 and 94K. They had almost the same normalized temperature (1-T/TC) dependence of Birr.",

keywords = "High pressure synthesis, Magnetic properties, Oxide superconductors., Superconductivity",

author = "N. Yoshida and S. Adachi and T. Tatsuki and T. Tamura and K. Tanabe and S. Fujihara and T. Kimura",

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AU - Yoshida, N.

AU - Adachi, S.

AU - Tatsuki, T.

AU - Tamura, T.

AU - Tanabe, K.

AU - Fujihara, S.

AU - Kimura, T.

PY - 1999/6

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AB - We tried to prepare the mercury-based superconductor, HgBa2Ca2Cu3O8+δ (Hg1223), under highly oxidizing atmosphere using a high pressure technique. Samples containing Hg1223 as the main phase with TC=90-122K were obtained. CuO and a new phase were included in the samples as impurities. The a-axes of the samples were shorter than the values ever reported for Hg1223 with TC=135K. These results suggest that our Hg1223 samples had excess hole concentrations, i.e. they are over-doped. The irreversibility field (Birr) was measured for two samples with TC=118 and 94K. They had almost the same normalized temperature (1-T/TC) dependence of Birr.

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10.1016/S0955-2219(98)00479-8