Structural Study of (La1-xMx)2CuO4-δ by X-Ray Four Circle Diffraction

Masashige Onoda; Shin Ichi Shamoto; Masatoshi Sato; Syoichi Hosoya

doi:10.7567/JJAPS.26S3.1049

Structural Study of (La_1-xM_x)₂CuO_4-δ by X-Ray Four Circle Diffraction

Masashige Onoda, Shin Ichi Shamoto, Masatoshi Sato, Syoichi Hosoya

Department of Physics

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

Abstract

Full structure determinations of (La1-xMx)2CuO4-δ (M=Sr and Ba), La2CuO4 and M'Ba2Cu3O7-δ (M'=Y, Ho and Dy) are carried out by X-ray four circle diffraction. The structures of (La1-xMx)2CuO4-δ crystal specimens (x≃0.075 and δ≃0) which exhibit superconductivity are K2NiF4-type ones with CuO6 ochtahedra. The Sr compound is tetragonal (I4/mmm) and the Ba compound is orthorhombic (Pccn) characterized by the rotation of CuO6. This rotation is different from that observed in La2CuO4. All the present specimens of M'Ba2Cu3O7-δ, which are found to be semiconducting, are tetragonal with P4/mmrn and the δ values are close to 1.0. Their structures are perovskite-related ones with the c axis triplicated due to the ordering of Ba and Y (Ho and Dy).

Original language	English
Pages (from-to)	1049-1050
Number of pages	2
Journal	Japanese journal of applied physics
Volume	26
Issue number	S3-2
DOIs	https://doi.org/10.7567/JJAPS.26S3.1049
Publication status	Published - 1987 Jan

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy(all)

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@article{3748684637fa45d0a64b849a3b6d4a0d,

title = "Structural Study of (La1-xMx)2CuO4-δ by X-Ray Four Circle Diffraction",

abstract = "Full structure determinations of (La1-xMx)2CuO4-δ (M=Sr and Ba), La2CuO4 and M'Ba2Cu3O7-δ (M'=Y, Ho and Dy) are carried out by X-ray four circle diffraction. The structures of (La1-xMx)2CuO4-δ crystal specimens (x≃0.075 and δ≃0) which exhibit superconductivity are K2NiF4-type ones with CuO6 ochtahedra. The Sr compound is tetragonal (I4/mmm) and the Ba compound is orthorhombic (Pccn) characterized by the rotation of CuO6. This rotation is different from that observed in La2CuO4. All the present specimens of M'Ba2Cu3O7-δ, which are found to be semiconducting, are tetragonal with P4/mmrn and the δ values are close to 1.0. Their structures are perovskite-related ones with the c axis triplicated due to the ordering of Ba and Y (Ho and Dy).",

author = "Masashige Onoda and Shamoto, {Shin Ichi} and Masatoshi Sato and Syoichi Hosoya",

year = "1987",

month = jan,

doi = "10.7567/JJAPS.26S3.1049",

language = "English",

volume = "26",

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journal = "Japanese Journal of Applied Physics",

issn = "0021-4922",

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T1 - Structural Study of (La1-xMx)2CuO4-δ by X-Ray Four Circle Diffraction

AU - Onoda, Masashige

AU - Shamoto, Shin Ichi

AU - Sato, Masatoshi

AU - Hosoya, Syoichi

PY - 1987/1

Y1 - 1987/1

N2 - Full structure determinations of (La1-xMx)2CuO4-δ (M=Sr and Ba), La2CuO4 and M'Ba2Cu3O7-δ (M'=Y, Ho and Dy) are carried out by X-ray four circle diffraction. The structures of (La1-xMx)2CuO4-δ crystal specimens (x≃0.075 and δ≃0) which exhibit superconductivity are K2NiF4-type ones with CuO6 ochtahedra. The Sr compound is tetragonal (I4/mmm) and the Ba compound is orthorhombic (Pccn) characterized by the rotation of CuO6. This rotation is different from that observed in La2CuO4. All the present specimens of M'Ba2Cu3O7-δ, which are found to be semiconducting, are tetragonal with P4/mmrn and the δ values are close to 1.0. Their structures are perovskite-related ones with the c axis triplicated due to the ordering of Ba and Y (Ho and Dy).

AB - Full structure determinations of (La1-xMx)2CuO4-δ (M=Sr and Ba), La2CuO4 and M'Ba2Cu3O7-δ (M'=Y, Ho and Dy) are carried out by X-ray four circle diffraction. The structures of (La1-xMx)2CuO4-δ crystal specimens (x≃0.075 and δ≃0) which exhibit superconductivity are K2NiF4-type ones with CuO6 ochtahedra. The Sr compound is tetragonal (I4/mmm) and the Ba compound is orthorhombic (Pccn) characterized by the rotation of CuO6. This rotation is different from that observed in La2CuO4. All the present specimens of M'Ba2Cu3O7-δ, which are found to be semiconducting, are tetragonal with P4/mmrn and the δ values are close to 1.0. Their structures are perovskite-related ones with the c axis triplicated due to the ordering of Ba and Y (Ho and Dy).

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Structural Study of (La_1-xM_x)₂CuO_4-δ by X-Ray Four Circle Diffraction

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