Nonstoichiometry and mixed pr valency in (pr1-xsrx)(pr1-ycey)cuo4-z

Hijiri Kito; Hiroshi Sawa; Jun Akimitsu; Fujio Izumi; Tōru Ishigaki; Hajime Asano

doi:10.1143/JJAP.29.L1803

Nonstoichiometry and mixed pr valency in (pr_1-xsr_x)(pr_1-yce_y)cuo_4-z

Hijiri Kito, Hiroshi Sawa, Jun Akimitsu, Fujio Izumi, Tōru Ishigaki, Hajime Asano

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

5 Citations (Scopus)

Abstract

The structural parameters of a nonsuperconductor (Pr_0.6Sr_0.4)(Pr_0.75Ce_0.25)CuO_4-z(z=0.012) were refined by the Rietveld analysis of TOF neutron powder diffraction data. It is isomorphous with a superconductor (Nd_1-xSr_x)(Nd_1-yCe_y)CuO_4-zand consists of K₂NiF₄- and Nd₂CuO₄-type units stacked alternately along the c-axis. An apical oxygen site in the K₂NiF₄unit is 1.2% deficient. Pr atoms in the Nd₂CuO₄unit are, at least partially, in the oxidation state +4. The origin of nonsuperconductivity in this compound is discussed from a crystal chemical point of view.

Original language	English
Pages (from-to)	L1803-L1806
Journal	Japanese Journal of Applied Physics
Volume	29
Issue number	10
DOIs	https://doi.org/10.1143/JJAP.29.L1803
Publication status	Published - Oct 1990
Externally published	Yes

Keywords

(PrSr)(PrCe)CuO
Mixed valency
Neutron powder diffraction
Nonstoichiometry
Rietveld analysis

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/JJAP.29.L1803

Cite this

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title = "Nonstoichiometry and mixed pr valency in (pr1-xsrx)(pr1-ycey)cuo4-z",

abstract = "The structural parameters of a nonsuperconductor (Pr0.6Sr0.4)(Pr0.75Ce0.25)CuO4-z(z=0.012) were refined by the Rietveld analysis of TOF neutron powder diffraction data. It is isomorphous with a superconductor (Nd1-xSrx)(Nd1-yCey)CuO4-zand consists of K2NiF4- and Nd2CuO4-type units stacked alternately along the c-axis. An apical oxygen site in the K2NiF4unit is 1.2% deficient. Pr atoms in the Nd2CuO4unit are, at least partially, in the oxidation state +4. The origin of nonsuperconductivity in this compound is discussed from a crystal chemical point of view.",

keywords = "(PrSr)(PrCe)CuO, Mixed valency, Neutron powder diffraction, Nonstoichiometry, Rietveld analysis",

author = "Hijiri Kito and Hiroshi Sawa and Jun Akimitsu and Fujio Izumi and Tōru Ishigaki and Hajime Asano",

year = "1990",

month = oct,

doi = "10.1143/JJAP.29.L1803",

language = "English",

volume = "29",

pages = "L1803--L1806",

journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",

issn = "0021-4922",

publisher = "INSTITUTE OF PURE AND APPLIED PHYSICS",

number = "10",

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TY - JOUR

T1 - Nonstoichiometry and mixed pr valency in (pr1-xsrx)(pr1-ycey)cuo4-z

AU - Kito, Hijiri

AU - Sawa, Hiroshi

AU - Akimitsu, Jun

AU - Izumi, Fujio

AU - Ishigaki, Tōru

AU - Asano, Hajime

PY - 1990/10

Y1 - 1990/10

N2 - The structural parameters of a nonsuperconductor (Pr0.6Sr0.4)(Pr0.75Ce0.25)CuO4-z(z=0.012) were refined by the Rietveld analysis of TOF neutron powder diffraction data. It is isomorphous with a superconductor (Nd1-xSrx)(Nd1-yCey)CuO4-zand consists of K2NiF4- and Nd2CuO4-type units stacked alternately along the c-axis. An apical oxygen site in the K2NiF4unit is 1.2% deficient. Pr atoms in the Nd2CuO4unit are, at least partially, in the oxidation state +4. The origin of nonsuperconductivity in this compound is discussed from a crystal chemical point of view.

AB - The structural parameters of a nonsuperconductor (Pr0.6Sr0.4)(Pr0.75Ce0.25)CuO4-z(z=0.012) were refined by the Rietveld analysis of TOF neutron powder diffraction data. It is isomorphous with a superconductor (Nd1-xSrx)(Nd1-yCey)CuO4-zand consists of K2NiF4- and Nd2CuO4-type units stacked alternately along the c-axis. An apical oxygen site in the K2NiF4unit is 1.2% deficient. Pr atoms in the Nd2CuO4unit are, at least partially, in the oxidation state +4. The origin of nonsuperconductivity in this compound is discussed from a crystal chemical point of view.

KW - (PrSr)(PrCe)CuO

KW - Mixed valency

KW - Neutron powder diffraction

KW - Nonstoichiometry

KW - Rietveld analysis

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JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

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