Raman Scattering from Co-substituted YBa2Cu3-xCoxO6+y Superconductors

Hirotaka Fujimori; Masato Kakihana; Masatomo Yashima; Masahiro Yoshimura; Hiromasa Mazaki; Hiroshi Yasuoka

doi:10.2497/jjspm.42.792

Raman Scattering from Co-substituted YBa₂Cu_3-xCo_xO_6+y Superconductors

Hirotaka Fujimori, Masato Kakihana, Masatomo Yashima, Masahiro Yoshimura, Hiromasa Mazaki, Hiroshi Yasuoka

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

Abstract

A systematic Micro-Raman spectroscopic investigation has been performed on YBa₂Cu_3-xCo_xO_6+y ceramic samples of different Co content x in the interval 0≤x≤1 which are prepared by a polymerized complex method. With increasing Co content an evolution of the defect induced Raman scattering of the CuO chain modes (550-650 cm^-1 region) has been observed. The intensity of the defect modes has increased with increasing Co concentration, which has in turn suggested increased disordering of oxygen in the based (Cu/Co)-Oy plane. It has been infered from Raman spectroscopic results that the CuO chain disorder is closely related to Tc and a certain minimal size of the oxygen disordered (or ordered) domain is needed for a decrease in Tc (or the appearance of superconductivity).

Original language	English
Pages (from-to)	792-797
Number of pages	6
Journal	journal of the japan society of powder and powder metallurgy
Volume	42
Issue number	7
DOIs	https://doi.org/10.2497/jjspm.42.792
Publication status	Published - 1995
Externally published	Yes

Keywords

Raman scattering
YBaCuCoO
oxygen disorder
superconductor

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.2497/jjspm.42.792

Cite this

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title = "Raman Scattering from Co-substituted YBa2Cu3-xCoxO6+y Superconductors",

abstract = "A systematic Micro-Raman spectroscopic investigation has been performed on YBa2Cu3-xCoxO6+y ceramic samples of different Co content x in the interval 0≤x≤1 which are prepared by a polymerized complex method. With increasing Co content an evolution of the defect induced Raman scattering of the CuO chain modes (550-650 cm-1 region) has been observed. The intensity of the defect modes has increased with increasing Co concentration, which has in turn suggested increased disordering of oxygen in the based (Cu/Co)-Oy plane. It has been infered from Raman spectroscopic results that the CuO chain disorder is closely related to Tc and a certain minimal size of the oxygen disordered (or ordered) domain is needed for a decrease in Tc (or the appearance of superconductivity).",

keywords = "Raman scattering, YBaCuCoO, oxygen disorder, superconductor",

author = "Hirotaka Fujimori and Masato Kakihana and Masatomo Yashima and Masahiro Yoshimura and Hiromasa Mazaki and Hiroshi Yasuoka",

year = "1995",

doi = "10.2497/jjspm.42.792",

language = "English",

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journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",

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T1 - Raman Scattering from Co-substituted YBa2Cu3-xCoxO6+y Superconductors

AU - Fujimori, Hirotaka

AU - Kakihana, Masato

AU - Yashima, Masatomo

AU - Yoshimura, Masahiro

AU - Mazaki, Hiromasa

AU - Yasuoka, Hiroshi

PY - 1995

Y1 - 1995

N2 - A systematic Micro-Raman spectroscopic investigation has been performed on YBa2Cu3-xCoxO6+y ceramic samples of different Co content x in the interval 0≤x≤1 which are prepared by a polymerized complex method. With increasing Co content an evolution of the defect induced Raman scattering of the CuO chain modes (550-650 cm-1 region) has been observed. The intensity of the defect modes has increased with increasing Co concentration, which has in turn suggested increased disordering of oxygen in the based (Cu/Co)-Oy plane. It has been infered from Raman spectroscopic results that the CuO chain disorder is closely related to Tc and a certain minimal size of the oxygen disordered (or ordered) domain is needed for a decrease in Tc (or the appearance of superconductivity).

AB - A systematic Micro-Raman spectroscopic investigation has been performed on YBa2Cu3-xCoxO6+y ceramic samples of different Co content x in the interval 0≤x≤1 which are prepared by a polymerized complex method. With increasing Co content an evolution of the defect induced Raman scattering of the CuO chain modes (550-650 cm-1 region) has been observed. The intensity of the defect modes has increased with increasing Co concentration, which has in turn suggested increased disordering of oxygen in the based (Cu/Co)-Oy plane. It has been infered from Raman spectroscopic results that the CuO chain disorder is closely related to Tc and a certain minimal size of the oxygen disordered (or ordered) domain is needed for a decrease in Tc (or the appearance of superconductivity).

KW - Raman scattering

KW - YBaCuCoO

KW - oxygen disorder

KW - superconductor

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