Relation between superconductivity and crystal structure on YBa2-xSrxCu3O7-δ (x=0-1.2)

Hiroshi Hayakawa, Etsuo Akiba, Masagi Mizuno, Shigemitsu Shin, Shuichiro Ono, Hideo Ihara, Eizou Ohno

Research output: Contribution to journalArticle

Abstract

A study on superconductivity (Tc) and structural parameters of YBa2-xSrxCu3O7-σ (0≤X≤1.2) has been carried out by the Rietveld analysis of X-ray powder diffraction patterns and measurement of d.c. electrical resistivity. Single phase samples were obtained in the whole range of x=0-1.0. Sr atoms were substituted for the Ba sites in YBa2Cu3O7-σ. Tc and lattice constants decreased linearly with the increase of x from x=0 to 1.2 except for x= 1.0 However, a discontinuous ″ ″ of Tc and a change in the axial ratio (a/b) was observed at x=1.0. In this structure the Tc's have relations with the oxygen occupancy in a Cu-O one dimensional chain as well as Ba(Sr)-O and Y-O length. The oxygen atoms in this system play an important role in superconductivity. The orthorhombic-tetragonal phase transition in the x=1.0 compound took place at 550°C, where the oxygen content was 6.7. The structure of the high temperature phase was refined as tetragonal (P4/mmm) by Rietveld analysis using X-ray powder diffraction patterns at room temperature. The low temperature phase which showed superconductivity was analysed using an orthorhombic structural model. The authors refined the structure using a micro-twin model which fitted the observed diffraction patterns better than the single phase model.

Original languageEnglish
Pages (from-to)174-181
Number of pages8
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume98
Issue number2
Publication statusPublished - Jan 1 1990

Fingerprint

Superconductivity
Diffraction patterns
Rietveld analysis
diffraction patterns
superconductivity
Crystal structure
Oxygen
X ray powder diffraction
crystal structure
Atoms
oxygen
Temperature
Lattice constants
oxygen atoms
x rays
Phase transitions
electrical resistivity
room temperature
atoms

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Relation between superconductivity and crystal structure on YBa2-xSrxCu3O7-δ (x=0-1.2). / Hayakawa, Hiroshi; Akiba, Etsuo; Mizuno, Masagi; Shin, Shigemitsu; Ono, Shuichiro; Ihara, Hideo; Ohno, Eizou.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 98, No. 2, 01.01.1990, p. 174-181.

Research output: Contribution to journalArticle

Hayakawa, Hiroshi ; Akiba, Etsuo ; Mizuno, Masagi ; Shin, Shigemitsu ; Ono, Shuichiro ; Ihara, Hideo ; Ohno, Eizou. / Relation between superconductivity and crystal structure on YBa2-xSrxCu3O7-δ (x=0-1.2). In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan. 1990 ; Vol. 98, No. 2. pp. 174-181.
@article{9b0d3ef672b246329efc05d80ddb7dfe,
title = "Relation between superconductivity and crystal structure on YBa2-xSrxCu3O7-δ (x=0-1.2)",
abstract = "A study on superconductivity (Tc) and structural parameters of YBa2-xSrxCu3O7-σ (0≤X≤1.2) has been carried out by the Rietveld analysis of X-ray powder diffraction patterns and measurement of d.c. electrical resistivity. Single phase samples were obtained in the whole range of x=0-1.0. Sr atoms were substituted for the Ba sites in YBa2Cu3O7-σ. Tc and lattice constants decreased linearly with the increase of x from x=0 to 1.2 except for x= 1.0 However, a discontinuous ″ ″ of Tc and a change in the axial ratio (a/b) was observed at x=1.0. In this structure the Tc's have relations with the oxygen occupancy in a Cu-O one dimensional chain as well as Ba(Sr)-O and Y-O length. The oxygen atoms in this system play an important role in superconductivity. The orthorhombic-tetragonal phase transition in the x=1.0 compound took place at 550°C, where the oxygen content was 6.7. The structure of the high temperature phase was refined as tetragonal (P4/mmm) by Rietveld analysis using X-ray powder diffraction patterns at room temperature. The low temperature phase which showed superconductivity was analysed using an orthorhombic structural model. The authors refined the structure using a micro-twin model which fitted the observed diffraction patterns better than the single phase model.",
author = "Hiroshi Hayakawa and Etsuo Akiba and Masagi Mizuno and Shigemitsu Shin and Shuichiro Ono and Hideo Ihara and Eizou Ohno",
year = "1990",
month = "1",
day = "1",
language = "English",
volume = "98",
pages = "174--181",
journal = "Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan",
issn = "1882-0743",
publisher = "Ceramic Society of Japan/Nippon Seramikkusu Kyokai",
number = "2",

}

TY - JOUR

T1 - Relation between superconductivity and crystal structure on YBa2-xSrxCu3O7-δ (x=0-1.2)

AU - Hayakawa, Hiroshi

AU - Akiba, Etsuo

AU - Mizuno, Masagi

AU - Shin, Shigemitsu

AU - Ono, Shuichiro

AU - Ihara, Hideo

AU - Ohno, Eizou

PY - 1990/1/1

Y1 - 1990/1/1

N2 - A study on superconductivity (Tc) and structural parameters of YBa2-xSrxCu3O7-σ (0≤X≤1.2) has been carried out by the Rietveld analysis of X-ray powder diffraction patterns and measurement of d.c. electrical resistivity. Single phase samples were obtained in the whole range of x=0-1.0. Sr atoms were substituted for the Ba sites in YBa2Cu3O7-σ. Tc and lattice constants decreased linearly with the increase of x from x=0 to 1.2 except for x= 1.0 However, a discontinuous ″ ″ of Tc and a change in the axial ratio (a/b) was observed at x=1.0. In this structure the Tc's have relations with the oxygen occupancy in a Cu-O one dimensional chain as well as Ba(Sr)-O and Y-O length. The oxygen atoms in this system play an important role in superconductivity. The orthorhombic-tetragonal phase transition in the x=1.0 compound took place at 550°C, where the oxygen content was 6.7. The structure of the high temperature phase was refined as tetragonal (P4/mmm) by Rietveld analysis using X-ray powder diffraction patterns at room temperature. The low temperature phase which showed superconductivity was analysed using an orthorhombic structural model. The authors refined the structure using a micro-twin model which fitted the observed diffraction patterns better than the single phase model.

AB - A study on superconductivity (Tc) and structural parameters of YBa2-xSrxCu3O7-σ (0≤X≤1.2) has been carried out by the Rietveld analysis of X-ray powder diffraction patterns and measurement of d.c. electrical resistivity. Single phase samples were obtained in the whole range of x=0-1.0. Sr atoms were substituted for the Ba sites in YBa2Cu3O7-σ. Tc and lattice constants decreased linearly with the increase of x from x=0 to 1.2 except for x= 1.0 However, a discontinuous ″ ″ of Tc and a change in the axial ratio (a/b) was observed at x=1.0. In this structure the Tc's have relations with the oxygen occupancy in a Cu-O one dimensional chain as well as Ba(Sr)-O and Y-O length. The oxygen atoms in this system play an important role in superconductivity. The orthorhombic-tetragonal phase transition in the x=1.0 compound took place at 550°C, where the oxygen content was 6.7. The structure of the high temperature phase was refined as tetragonal (P4/mmm) by Rietveld analysis using X-ray powder diffraction patterns at room temperature. The low temperature phase which showed superconductivity was analysed using an orthorhombic structural model. The authors refined the structure using a micro-twin model which fitted the observed diffraction patterns better than the single phase model.

UR - http://www.scopus.com/inward/record.url?scp=0025248961&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025248961&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0025248961

VL - 98

SP - 174

EP - 181

JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan

JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan

SN - 1882-0743

IS - 2

ER -