The Modulation and Synthesis for Bi2Sr2CuOδ under Ambient Oxygen Partial Pressure

Toshinobu Niinae; Yasunori Ikeda; Yoshichika Bando; Yoshihiro Kusano; Jun Takada

doi:10.2497/jjspm.45.661

The Modulation and Synthesis for Bi₂Sr₂CuO_δ under Ambient Oxygen Partial Pressure

Toshinobu Niinae, Yasunori Ikeda, Yoshichika Bando, Yoshihiro Kusano, Jun Takada

School of Engineering

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

Abstract

The cation stoichiometric Bi₂Sr₂CuOδ was successfully obtained by solid state reaction under ambient oxygen pressures (Po₂=0.2,1atm). The modulation period as estimated by means of X-ray powder diffraction was λ≅4.7b for Bi₂Sr₂CuOδ synthesized under Po₂=1atm, which is shorter than that for Bi_2.125Sr_1.875CuO_z (λ≅15b). The Bi₂Sr₂CuO_δ synthesized under Po₂=1 atm showed metallic conductivity down to 2K, whereas it done under Po₂=0.2 atm showed superconductivity with Tc≈8K. By annealing in Ar, Tc was raised up to 16K. At the same time, it was newly found that the modulation is disproportionate into two types with λ≅4.7b and λ≅5.5b.

Original language	English
Pages (from-to)	661-665
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	45
Issue number	7
DOIs	https://doi.org/10.2497/jjspm.45.661
Publication status	Published - Jul 1998

Keywords

A new modulation mode
Monophasic BiSrCuO, superconductor
The cation stoichiometric Bi-2201

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.2497/jjspm.45.661

Cite this

@article{1cc0049e842f4c06bb305a0fcc697123,

title = "The Modulation and Synthesis for Bi2Sr2CuOδ under Ambient Oxygen Partial Pressure",

abstract = "The cation stoichiometric Bi2Sr2CuOδ was successfully obtained by solid state reaction under ambient oxygen pressures (Po2=0.2,1atm). The modulation period as estimated by means of X-ray powder diffraction was λ≅4.7b for Bi2Sr2CuOδ synthesized under Po2=1atm, which is shorter than that for Bi2.125Sr1.875CuOz (λ≅15b). The Bi2Sr2CuOδ synthesized under Po2=1 atm showed metallic conductivity down to 2K, whereas it done under Po2=0.2 atm showed superconductivity with Tc≈8K. By annealing in Ar, Tc was raised up to 16K. At the same time, it was newly found that the modulation is disproportionate into two types with λ≅4.7b and λ≅5.5b.",

keywords = "A new modulation mode, Monophasic BiSrCuO, superconductor, The cation stoichiometric Bi-2201",

author = "Toshinobu Niinae and Yasunori Ikeda and Yoshichika Bando and Yoshihiro Kusano and Jun Takada",

year = "1998",

month = jul,

doi = "10.2497/jjspm.45.661",

language = "English",

volume = "45",

pages = "661--665",

journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",

issn = "0532-8799",

publisher = "Funtai Funamtsu Yakin Kyokai/Japan Soc. of Powder Metallurgy",

number = "7",

}

TY - JOUR

T1 - The Modulation and Synthesis for Bi2Sr2CuOδ under Ambient Oxygen Partial Pressure

AU - Niinae, Toshinobu

AU - Ikeda, Yasunori

AU - Bando, Yoshichika

AU - Kusano, Yoshihiro

AU - Takada, Jun

PY - 1998/7

Y1 - 1998/7

N2 - The cation stoichiometric Bi2Sr2CuOδ was successfully obtained by solid state reaction under ambient oxygen pressures (Po2=0.2,1atm). The modulation period as estimated by means of X-ray powder diffraction was λ≅4.7b for Bi2Sr2CuOδ synthesized under Po2=1atm, which is shorter than that for Bi2.125Sr1.875CuOz (λ≅15b). The Bi2Sr2CuOδ synthesized under Po2=1 atm showed metallic conductivity down to 2K, whereas it done under Po2=0.2 atm showed superconductivity with Tc≈8K. By annealing in Ar, Tc was raised up to 16K. At the same time, it was newly found that the modulation is disproportionate into two types with λ≅4.7b and λ≅5.5b.

AB - The cation stoichiometric Bi2Sr2CuOδ was successfully obtained by solid state reaction under ambient oxygen pressures (Po2=0.2,1atm). The modulation period as estimated by means of X-ray powder diffraction was λ≅4.7b for Bi2Sr2CuOδ synthesized under Po2=1atm, which is shorter than that for Bi2.125Sr1.875CuOz (λ≅15b). The Bi2Sr2CuOδ synthesized under Po2=1 atm showed metallic conductivity down to 2K, whereas it done under Po2=0.2 atm showed superconductivity with Tc≈8K. By annealing in Ar, Tc was raised up to 16K. At the same time, it was newly found that the modulation is disproportionate into two types with λ≅4.7b and λ≅5.5b.

KW - A new modulation mode

KW - Monophasic BiSrCuO, superconductor

KW - The cation stoichiometric Bi-2201

UR - http://www.scopus.com/inward/record.url?scp=0032118356&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032118356&partnerID=8YFLogxK

U2 - 10.2497/jjspm.45.661

DO - 10.2497/jjspm.45.661

M3 - Article

AN - SCOPUS:0032118356

SN - 0532-8799

VL - 45

SP - 661

EP - 665

JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

IS - 7

ER -