Synthesis and superconductivity of oxycarbonates of the Tl-1201 phase

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

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Pages (from-to)200-204
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume219
Issue number1-2
DOIs
Publication statusPublished - Jan 1 1994
Externally publishedYes

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Phase stability
High resolution electron microscopy
Superconductivity
Electron diffraction
X ray powder diffraction
Volume fraction
superconductivity
synthesis
magnetic measurement
periodic variations
electron microscopy
electron diffraction
high resolution
diffraction
x rays
Magnetometry

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Synthesis and superconductivity of oxycarbonates of the Tl-1201 phase. / Kikuchi, M.; Ohshima, E.; Ohnishi, N.; Muraoka, Yuji; Nakajima, S.; Aoyagi, E.; Ogawa, M.; Akimitsu, Jun; Oku, T.; Hiraga, K.; Syono, Y.

In: Physica C: Superconductivity and its Applications, Vol. 219, No. 1-2, 01.01.1994, p. 200-204.

Research output: Contribution to journalArticle

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, vol. 219, no. 1-2, pp. 200-204. https://doi.org/10.1016/0921-4534(94)90035-3
Kikuchi, M. ; Ohshima, E. ; Ohnishi, N. ; Muraoka, Yuji ; Nakajima, S. ; Aoyagi, E. ; Ogawa, M. ; Akimitsu, Jun ; Oku, T. ; Hiraga, K. ; Syono, Y. / Synthesis and superconductivity of oxycarbonates of the Tl-1201 phase. In: Physica C: Superconductivity and its Applications. 1994 ; Vol. 219, No. 1-2. pp. 200-204.
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