Synthesis and superconductivity of oxycarbonates of the Tl-1201 phase

M. Kikuchi; E. Ohshima; N. Ohnishi; Y. Muraoka; S. Nakajima; E. Aoyagi; M. Ogawa; J. Akimitsu; T. Oku; K. Hiraga; Y. Syono

doi:10.1016/0921-4534(94)90035-3

Synthesis and superconductivity of oxycarbonates of the Tl-1201 phase

M. Kikuchi, E. Ohshima, N. Ohnishi, Y. Muraoka, S. Nakajima, E. Aoyagi, M. Ogawa, J. Akimitsu, T. Oku, K. Hiraga, Y. Syono

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16 Citations (Scopus)

Abstract

TlBa_xSr_4-xCu₂(CO₃)O_y oxycarbonates with the Tl-1201 structure were synthesized over a wide range of x (1.0≤x ≤3.2) and examined by X-ray powder diffraction, electron diffraction, high-resolution electron microscopy and magnetometry methods. New phases with the Tl-1201 structure having 6 and 7 times periodicities along the b-axis were isolated. The former was stable for a wide Ba-rich range (1.8≤x≤3.2), and the latter was observed for a smaller Ba content range (1.2≤x≤1.6). The phase stability was found to depend on the synthesis condition. The maximum T_c of the as-synthesized specimen in this series occurred at about 70 K around x=2.0. The Meissner volume fraction of the as-synthesized specimen (x=2.4) was 30% at 5 K.

Original language	English
Pages (from-to)	200-204
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	219
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(94)90035-3
Publication status	Published - Jan 1 1994
Externally published	Yes

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ASJC Scopus subject areas

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

Cite this

Kikuchi, M., Ohshima, E., Ohnishi, N., Muraoka, Y., Nakajima, S., Aoyagi, E., Ogawa, M., Akimitsu, J., Oku, T., Hiraga, K., & Syono, Y. (1994). Synthesis and superconductivity of oxycarbonates of the Tl-1201 phase. Physica C: Superconductivity and its applications, 219(1-2), 200-204. https://doi.org/10.1016/0921-4534(94)90035-3

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abstract = "TlBaxSr4-xCu2(CO3)Oy oxycarbonates with the Tl-1201 structure were synthesized over a wide range of x (1.0≤x ≤3.2) and examined by X-ray powder diffraction, electron diffraction, high-resolution electron microscopy and magnetometry methods. New phases with the Tl-1201 structure having 6 and 7 times periodicities along the b-axis were isolated. The former was stable for a wide Ba-rich range (1.8≤x≤3.2), and the latter was observed for a smaller Ba content range (1.2≤x≤1.6). The phase stability was found to depend on the synthesis condition. The maximum Tc of the as-synthesized specimen in this series occurred at about 70 K around x=2.0. The Meissner volume fraction of the as-synthesized specimen (x=2.4) was 30% at 5 K.",

author = "M. Kikuchi and E. Ohshima and N. Ohnishi and Y. Muraoka and S. Nakajima and E. Aoyagi and M. Ogawa and J. Akimitsu and T. Oku and K. Hiraga and Y. Syono",

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AU - Kikuchi, M.

AU - Ohshima, E.

AU - Ohnishi, N.

AU - Muraoka, Y.

AU - Nakajima, S.

AU - Aoyagi, E.

AU - Ogawa, M.

AU - Akimitsu, J.

AU - Oku, T.

AU - Hiraga, K.

AU - Syono, Y.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - TlBaxSr4-xCu2(CO3)Oy oxycarbonates with the Tl-1201 structure were synthesized over a wide range of x (1.0≤x ≤3.2) and examined by X-ray powder diffraction, electron diffraction, high-resolution electron microscopy and magnetometry methods. New phases with the Tl-1201 structure having 6 and 7 times periodicities along the b-axis were isolated. The former was stable for a wide Ba-rich range (1.8≤x≤3.2), and the latter was observed for a smaller Ba content range (1.2≤x≤1.6). The phase stability was found to depend on the synthesis condition. The maximum Tc of the as-synthesized specimen in this series occurred at about 70 K around x=2.0. The Meissner volume fraction of the as-synthesized specimen (x=2.4) was 30% at 5 K.

AB - TlBaxSr4-xCu2(CO3)Oy oxycarbonates with the Tl-1201 structure were synthesized over a wide range of x (1.0≤x ≤3.2) and examined by X-ray powder diffraction, electron diffraction, high-resolution electron microscopy and magnetometry methods. New phases with the Tl-1201 structure having 6 and 7 times periodicities along the b-axis were isolated. The former was stable for a wide Ba-rich range (1.8≤x≤3.2), and the latter was observed for a smaller Ba content range (1.2≤x≤1.6). The phase stability was found to depend on the synthesis condition. The maximum Tc of the as-synthesized specimen in this series occurred at about 70 K around x=2.0. The Meissner volume fraction of the as-synthesized specimen (x=2.4) was 30% at 5 K.

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10.1016/0921-4534(94)90035-3