Oxygen K-edge fine structure of Tl2Ba2Can-1CuxO2n+4 studied by electron energy loss spectroscopy

D. Shindo; K. Hiraga; S. Nakajima; M. Kikuchi; Y. Syono; K. Hojou; T. Soga; S. Furuno; H. Otsu

doi:10.1016/0921-4534(90)90211-V

Oxygen K-edge fine structure of Tl₂Ba₂Ca_n-1Cu_xO_2n+4 studied by electron energy loss spectroscopy

D. Shindo, K. Hiraga, S. Nakajima, M. Kikuchi, Y. Syono, K. Hojou, T. Soga, S. Furuno, H. Otsu

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Abstract

The fine structures of the oxygen K-edge in Tl₂Ba₂Ca_n-1Cu_nO_2n+4 (n=1-3) with double Tl-O layers were investigated by electron energy loss spectroscopy (EELS). A peak at 528 eV becomes smaller with the increase of the number of Cu-O layers, n, in Tl₂Ba₂Ca_n-1Cu_nO_2n+4, indicating that the average hole content in a Cu-O bonding decreases with the increase of n. Reducing the hole content in Tl₂Ba₂Cu₁O₆ by replacing a part of Ba(+2) with La(+3), the peak at 528 eV becomes smaller and T_c of the compounds increases up to 55 K. It was shown that holes of Tl₂Ba₂Cu₁O₆ are overdoped. The present EELS results were compared with the previous results of Tl₁Ba₂Ca_n-1Cu_nO_2n+3 with single Tl-O layers.

Original language	English
Pages (from-to)	321-324
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	165
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(90)90211-V
Publication status	Published - 1990 Feb 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(90)90211-V

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title = "Oxygen K-edge fine structure of Tl2Ba2Can-1CuxO2n+4 studied by electron energy loss spectroscopy",

abstract = "The fine structures of the oxygen K-edge in Tl2Ba2Can-1CunO2n+4 (n=1-3) with double Tl-O layers were investigated by electron energy loss spectroscopy (EELS). A peak at 528 eV becomes smaller with the increase of the number of Cu-O layers, n, in Tl2Ba2Can-1CunO2n+4, indicating that the average hole content in a Cu-O bonding decreases with the increase of n. Reducing the hole content in Tl2Ba2Cu1O6 by replacing a part of Ba(+2) with La(+3), the peak at 528 eV becomes smaller and Tc of the compounds increases up to 55 K. It was shown that holes of Tl2Ba2Cu1O6 are overdoped. The present EELS results were compared with the previous results of Tl1Ba2Can-1CunO2n+3 with single Tl-O layers.",

author = "D. Shindo and K. Hiraga and S. Nakajima and M. Kikuchi and Y. Syono and K. Hojou and T. Soga and S. Furuno and H. Otsu",

note = "Funding Information: The authors wish to thank Prof. Y. Muto and Prof. M. Tachiki, Institute for Materials Research, To-hoku University for their interesta nd discussion.T he work was supportedb y a Grant-in-Aid for Scientific Research on Priority Areas “Mechanism of Superconductivity”.",

year = "1990",

month = feb,

day = "1",

doi = "10.1016/0921-4534(90)90211-V",

language = "English",

volume = "165",

pages = "321--324",

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

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TY - JOUR

T1 - Oxygen K-edge fine structure of Tl2Ba2Can-1CuxO2n+4 studied by electron energy loss spectroscopy

AU - Shindo, D.

AU - Hiraga, K.

AU - Nakajima, S.

AU - Kikuchi, M.

AU - Syono, Y.

AU - Hojou, K.

AU - Soga, T.

AU - Furuno, S.

AU - Otsu, H.

N1 - Funding Information: The authors wish to thank Prof. Y. Muto and Prof. M. Tachiki, Institute for Materials Research, To-hoku University for their interesta nd discussion.T he work was supportedb y a Grant-in-Aid for Scientific Research on Priority Areas “Mechanism of Superconductivity”.

PY - 1990/2/1

Y1 - 1990/2/1

N2 - The fine structures of the oxygen K-edge in Tl2Ba2Can-1CunO2n+4 (n=1-3) with double Tl-O layers were investigated by electron energy loss spectroscopy (EELS). A peak at 528 eV becomes smaller with the increase of the number of Cu-O layers, n, in Tl2Ba2Can-1CunO2n+4, indicating that the average hole content in a Cu-O bonding decreases with the increase of n. Reducing the hole content in Tl2Ba2Cu1O6 by replacing a part of Ba(+2) with La(+3), the peak at 528 eV becomes smaller and Tc of the compounds increases up to 55 K. It was shown that holes of Tl2Ba2Cu1O6 are overdoped. The present EELS results were compared with the previous results of Tl1Ba2Can-1CunO2n+3 with single Tl-O layers.

AB - The fine structures of the oxygen K-edge in Tl2Ba2Can-1CunO2n+4 (n=1-3) with double Tl-O layers were investigated by electron energy loss spectroscopy (EELS). A peak at 528 eV becomes smaller with the increase of the number of Cu-O layers, n, in Tl2Ba2Can-1CunO2n+4, indicating that the average hole content in a Cu-O bonding decreases with the increase of n. Reducing the hole content in Tl2Ba2Cu1O6 by replacing a part of Ba(+2) with La(+3), the peak at 528 eV becomes smaller and Tc of the compounds increases up to 55 K. It was shown that holes of Tl2Ba2Cu1O6 are overdoped. The present EELS results were compared with the previous results of Tl1Ba2Can-1CunO2n+3 with single Tl-O layers.

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JO - Physica C: Superconductivity and its Applications

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Oxygen K-edge fine structure of Tl₂Ba₂Ca_n-1Cu_xO_2n+4 studied by electron energy loss spectroscopy

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