Sr-induced oxygen defects in La2-xSrxCuO4-δ a neutron powder diffraction study

T. Kamiyana; F. Izumi; H. Asano; H. Takagi; S. Uchida; Y. Tokurs; E. Takayama-Muromachi; M. Matsuda; Y. Endoh; Y. Hidaka

doi:10.1016/0921-4534(90)90649-Y

Sr-induced oxygen defects in La_2-xSr_xCuO_4-δ a neutron powder diffraction study

T. Kamiyana, F. Izumi, H. Asano, H. Takagi, S. Uchida, Y. Tokurs, E. Takayama-Muromachi, M. Matsuda, Y. Endoh, Y. Hidaka

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Abstract

The validity so Sr-induced oxygen-defect structure in La_2-xSr_xCuO_4-δ claimed by Tan et el. was judged by the Rietveld analysis of TOF neutron powder diffraction data of La_2-xSr_xCuO_4-δ (x=0, 0.11, 0.15, 0.3 and 0.6); both oxidized and reduced samples were used for the composition x=0.11. The samples with x=0.15, 0.3 and 0.6 were tetragonal (14/mmmm) at room temperature, while La₂CuO_4-δat room temperature anf La_1.89Sr_0.11CuO_4-δat 115 K were orthorhombic (Cmca). No interstitial oxygen trapped near Sr could be detected in any of the samples. In La_1.4Sr_0.6CuO_4-δ, an equational oxygen site is 8% deficient, and the distance between Cu and apical oxygen is as short as 2.337 Å, which is ascribed to the formation of oxygen defects related structurally to Sr₂CuO₃.

Original language	English
Pages (from-to)	120-126
Number of pages	7
Journal	Physica C: Superconductivity and its Applications
Volume	172
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(90)90649-Y
State	Published - Dec 1 1990
Externally published	Yes

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@article{900013600db54b20b130df567b9cdbbb,

title = "Sr-induced oxygen defects in La2-xSrxCuO4-δ a neutron powder diffraction study",

abstract = "The validity so Sr-induced oxygen-defect structure in La2-xSrxCuO4-δ claimed by Tan et el. was judged by the Rietveld analysis of TOF neutron powder diffraction data of La2-xSrxCuO4-δ (x=0, 0.11, 0.15, 0.3 and 0.6); both oxidized and reduced samples were used for the composition x=0.11. The samples with x=0.15, 0.3 and 0.6 were tetragonal (14/mmmm) at room temperature, while La2CuO4-δat room temperature anf La1.89Sr0.11CuO4-δat 115 K were orthorhombic (Cmca). No interstitial oxygen trapped near Sr could be detected in any of the samples. In La1.4Sr0.6CuO4-δ, an equational oxygen site is 8% deficient, and the distance between Cu and apical oxygen is as short as 2.337 {\AA}, which is ascribed to the formation of oxygen defects related structurally to Sr2CuO3.",

author = "T. Kamiyana and F. Izumi and H. Asano and H. Takagi and S. Uchida and Y. Tokurs and E. Takayama-Muromachi and M. Matsuda and Y. Endoh and Y. Hidaka",

year = "1990",

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doi = "10.1016/0921-4534(90)90649-Y",

language = "English",

volume = "172",

pages = "120--126",

journal = "Physica C: Superconductivity and its Applications",

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T1 - Sr-induced oxygen defects in La2-xSrxCuO4-δ a neutron powder diffraction study

AU - Kamiyana, T.

AU - Izumi, F.

AU - Asano, H.

AU - Takagi, H.

AU - Uchida, S.

AU - Tokurs, Y.

AU - Takayama-Muromachi, E.

AU - Matsuda, M.

AU - Endoh, Y.

AU - Hidaka, Y.

PY - 1990/12/1

Y1 - 1990/12/1

N2 - The validity so Sr-induced oxygen-defect structure in La2-xSrxCuO4-δ claimed by Tan et el. was judged by the Rietveld analysis of TOF neutron powder diffraction data of La2-xSrxCuO4-δ (x=0, 0.11, 0.15, 0.3 and 0.6); both oxidized and reduced samples were used for the composition x=0.11. The samples with x=0.15, 0.3 and 0.6 were tetragonal (14/mmmm) at room temperature, while La2CuO4-δat room temperature anf La1.89Sr0.11CuO4-δat 115 K were orthorhombic (Cmca). No interstitial oxygen trapped near Sr could be detected in any of the samples. In La1.4Sr0.6CuO4-δ, an equational oxygen site is 8% deficient, and the distance between Cu and apical oxygen is as short as 2.337 Å, which is ascribed to the formation of oxygen defects related structurally to Sr2CuO3.

AB - The validity so Sr-induced oxygen-defect structure in La2-xSrxCuO4-δ claimed by Tan et el. was judged by the Rietveld analysis of TOF neutron powder diffraction data of La2-xSrxCuO4-δ (x=0, 0.11, 0.15, 0.3 and 0.6); both oxidized and reduced samples were used for the composition x=0.11. The samples with x=0.15, 0.3 and 0.6 were tetragonal (14/mmmm) at room temperature, while La2CuO4-δat room temperature anf La1.89Sr0.11CuO4-δat 115 K were orthorhombic (Cmca). No interstitial oxygen trapped near Sr could be detected in any of the samples. In La1.4Sr0.6CuO4-δ, an equational oxygen site is 8% deficient, and the distance between Cu and apical oxygen is as short as 2.337 Å, which is ascribed to the formation of oxygen defects related structurally to Sr2CuO3.

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U2 - 10.1016/0921-4534(90)90649-Y

DO - 10.1016/0921-4534(90)90649-Y

M3 - Article

AN - SCOPUS:0025643878

SN - 0921-4534

VL - 172

SP - 120

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-2

ER -

Sr-induced oxygen defects in La_2-xSr_xCuO_4-δ a neutron powder diffraction study

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