Systematic study on synthesis and structural, electrical transport and magnetic properties of Pb-substituted Bi-Ca-Co-O misfit-layer cobaltites

Yoshiaki Tanaka, Tatsuo Fujii, Makoto Nakanishi, Yoshihiro Kusano, Hideki Hashimoto, Yasunori Ikeda, Jun Takada

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Single-phases of Pb-substituted Bi-Ca-Co-O misfit-layer cobaltites with various Pb concentrations have been synthesized and the Pb-substitution effects on the structural, electrical and magnetic properties have been systematically investigated. Powder X-ray diffraction analysis showed that the single-phases of Bi1.8-x/2PbxCa2Co2Oz were obtained up to x = 0.6 - 0.7 under the optimized synthesis conditions. The lattice parameters of Bi1.8-x/2PbxCa2Co2Oz continuously changed with increasing Pb concentration. The electron diffraction analysis suggested that the structure consisted of two different sublattices with a rock salt structure (RS) and a hexagonal CdI2 structure (H), respectively, without modulation. In combined with the chemical composition analysis, the chemical formulas of the x = 0 and x = 0.6 samples were determined approximately as [Bi1.74Co0.31Ca2.01O4]RS[CoO2]1.69 and [Bi1.47Pb0.38Co0.29Ca1.98O4]RS[CoO2]1.71, respectively. The electrical resistivity became more metallic with increasing the Pb concentration up to x = 0.6. Moreover, the Pb-substitution simultaneously increased the antiferromagnetic Weiss temperatures and decreased the effective magnetic moments of the Co ions.

Original languageEnglish
Pages (from-to)122-126
Number of pages5
JournalSolid State Communications
Volume141
Issue number3
DOIs
Publication statusPublished - Jan 2007

Fingerprint

halites
Transport properties
Magnetic properties
Salts
transport properties
Rocks
magnetic properties
Substitution reactions
synthesis
substitutes
Magnetic moments
Electron diffraction
X ray diffraction analysis
sublattices
Lattice constants
Structural properties
lattice parameters
chemical composition
Electric properties
electron diffraction

Keywords

  • A. Misfit-later cobaltite
  • D. Hole-doping
  • D. Pb-substitution

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Systematic study on synthesis and structural, electrical transport and magnetic properties of Pb-substituted Bi-Ca-Co-O misfit-layer cobaltites. / Tanaka, Yoshiaki; Fujii, Tatsuo; Nakanishi, Makoto; Kusano, Yoshihiro; Hashimoto, Hideki; Ikeda, Yasunori; Takada, Jun.

In: Solid State Communications, Vol. 141, No. 3, 01.2007, p. 122-126.

Research output: Contribution to journalArticle

@article{498b54de467b4eb7aaa6f0992e665a45,
title = "Systematic study on synthesis and structural, electrical transport and magnetic properties of Pb-substituted Bi-Ca-Co-O misfit-layer cobaltites",
abstract = "Single-phases of Pb-substituted Bi-Ca-Co-O misfit-layer cobaltites with various Pb concentrations have been synthesized and the Pb-substitution effects on the structural, electrical and magnetic properties have been systematically investigated. Powder X-ray diffraction analysis showed that the single-phases of Bi1.8-x/2PbxCa2Co2Oz were obtained up to x = 0.6 - 0.7 under the optimized synthesis conditions. The lattice parameters of Bi1.8-x/2PbxCa2Co2Oz continuously changed with increasing Pb concentration. The electron diffraction analysis suggested that the structure consisted of two different sublattices with a rock salt structure (RS) and a hexagonal CdI2 structure (H), respectively, without modulation. In combined with the chemical composition analysis, the chemical formulas of the x = 0 and x = 0.6 samples were determined approximately as [Bi1.74Co0.31Ca2.01O4]RS[CoO2]1.69 and [Bi1.47Pb0.38Co0.29Ca1.98O4]RS[CoO2]1.71, respectively. The electrical resistivity became more metallic with increasing the Pb concentration up to x = 0.6. Moreover, the Pb-substitution simultaneously increased the antiferromagnetic Weiss temperatures and decreased the effective magnetic moments of the Co ions.",
keywords = "A. Misfit-later cobaltite, D. Hole-doping, D. Pb-substitution",
author = "Yoshiaki Tanaka and Tatsuo Fujii and Makoto Nakanishi and Yoshihiro Kusano and Hideki Hashimoto and Yasunori Ikeda and Jun Takada",
year = "2007",
month = "1",
doi = "10.1016/j.ssc.2006.10.015",
language = "English",
volume = "141",
pages = "122--126",
journal = "Solid State Communications",
issn = "0038-1098",
publisher = "Elsevier Limited",
number = "3",

}

TY - JOUR

T1 - Systematic study on synthesis and structural, electrical transport and magnetic properties of Pb-substituted Bi-Ca-Co-O misfit-layer cobaltites

AU - Tanaka, Yoshiaki

AU - Fujii, Tatsuo

AU - Nakanishi, Makoto

AU - Kusano, Yoshihiro

AU - Hashimoto, Hideki

AU - Ikeda, Yasunori

AU - Takada, Jun

PY - 2007/1

Y1 - 2007/1

N2 - Single-phases of Pb-substituted Bi-Ca-Co-O misfit-layer cobaltites with various Pb concentrations have been synthesized and the Pb-substitution effects on the structural, electrical and magnetic properties have been systematically investigated. Powder X-ray diffraction analysis showed that the single-phases of Bi1.8-x/2PbxCa2Co2Oz were obtained up to x = 0.6 - 0.7 under the optimized synthesis conditions. The lattice parameters of Bi1.8-x/2PbxCa2Co2Oz continuously changed with increasing Pb concentration. The electron diffraction analysis suggested that the structure consisted of two different sublattices with a rock salt structure (RS) and a hexagonal CdI2 structure (H), respectively, without modulation. In combined with the chemical composition analysis, the chemical formulas of the x = 0 and x = 0.6 samples were determined approximately as [Bi1.74Co0.31Ca2.01O4]RS[CoO2]1.69 and [Bi1.47Pb0.38Co0.29Ca1.98O4]RS[CoO2]1.71, respectively. The electrical resistivity became more metallic with increasing the Pb concentration up to x = 0.6. Moreover, the Pb-substitution simultaneously increased the antiferromagnetic Weiss temperatures and decreased the effective magnetic moments of the Co ions.

AB - Single-phases of Pb-substituted Bi-Ca-Co-O misfit-layer cobaltites with various Pb concentrations have been synthesized and the Pb-substitution effects on the structural, electrical and magnetic properties have been systematically investigated. Powder X-ray diffraction analysis showed that the single-phases of Bi1.8-x/2PbxCa2Co2Oz were obtained up to x = 0.6 - 0.7 under the optimized synthesis conditions. The lattice parameters of Bi1.8-x/2PbxCa2Co2Oz continuously changed with increasing Pb concentration. The electron diffraction analysis suggested that the structure consisted of two different sublattices with a rock salt structure (RS) and a hexagonal CdI2 structure (H), respectively, without modulation. In combined with the chemical composition analysis, the chemical formulas of the x = 0 and x = 0.6 samples were determined approximately as [Bi1.74Co0.31Ca2.01O4]RS[CoO2]1.69 and [Bi1.47Pb0.38Co0.29Ca1.98O4]RS[CoO2]1.71, respectively. The electrical resistivity became more metallic with increasing the Pb concentration up to x = 0.6. Moreover, the Pb-substitution simultaneously increased the antiferromagnetic Weiss temperatures and decreased the effective magnetic moments of the Co ions.

KW - A. Misfit-later cobaltite

KW - D. Hole-doping

KW - D. Pb-substitution

UR - http://www.scopus.com/inward/record.url?scp=33751418654&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33751418654&partnerID=8YFLogxK

U2 - 10.1016/j.ssc.2006.10.015

DO - 10.1016/j.ssc.2006.10.015

M3 - Article

VL - 141

SP - 122

EP - 126

JO - Solid State Communications

JF - Solid State Communications

SN - 0038-1098

IS - 3

ER -