A new homologous series of oxycarbonate superconductors Sr2(Ca,Sr)n-1Cun(CO3)1-χ(BO3)χOy (n=1, 2 and 3)

M. Uehara, M. Uoshima, S. Ishiyama, H. Nakata, Jun Akimitsu, Y. Matsui, T. Arima, Y. Tokura, N. Mori

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Abstract

A new homologous series of oxycarbonate superconductors Sr2(Ca,Sr)n-1Cun(CO3)1-χ(BO3)χOy (n=1, 2 and 3) prepared under high pressure have been found by resistivity and magnetization measurements. X-ray powder diffraction and HRTEM studies show that these phases have tetragonal structures with a=3.86 A ̊ and c=7.40 A ̊ for n=1, a=3.86 A ̊ and c=10.62 A ̊ for n=2, and a=3.87 A ̊ and c=13.98 A ̊ for n=3. Resistivity and magnetization measurements revealed that superconducting transition temperatures were 50, 105 and 115 K for n=1-3, respectively. These Tc's are higher than those of the structurally related analogous TlBa2Can-1CunO2n+3 at 100 and 110 K (n=2 and 3).

Original languageEnglish
Pages (from-to)310-314
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume229
Issue number3-4
DOIs
Publication statusPublished - Aug 15 1994
Externally publishedYes

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Superconducting materials
Magnetization
magnetization
electrical resistivity
X ray powder diffraction
Superconducting transition temperature
transition temperature
diffraction
x rays

ASJC Scopus subject areas

  • Condensed Matter Physics

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A new homologous series of oxycarbonate superconductors Sr2(Ca,Sr)n-1Cun(CO3)1-χ(BO3)χOy (n=1, 2 and 3). / Uehara, M.; Uoshima, M.; Ishiyama, S.; Nakata, H.; Akimitsu, Jun; Matsui, Y.; Arima, T.; Tokura, Y.; Mori, N.

In: Physica C: Superconductivity and its Applications, Vol. 229, No. 3-4, 15.08.1994, p. 310-314.

Research output: Contribution to journalArticle

Uehara, M. ; Uoshima, M. ; Ishiyama, S. ; Nakata, H. ; Akimitsu, Jun ; Matsui, Y. ; Arima, T. ; Tokura, Y. ; Mori, N. / A new homologous series of oxycarbonate superconductors Sr2(Ca,Sr)n-1Cun(CO3)1-χ(BO3)χOy (n=1, 2 and 3). In: Physica C: Superconductivity and its Applications. 1994 ; Vol. 229, No. 3-4. pp. 310-314.
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AU - Uoshima, M.

AU - Ishiyama, S.

AU - Nakata, H.

AU - Akimitsu, Jun

AU - Matsui, Y.

AU - Arima, T.

AU - Tokura, Y.

AU - Mori, N.

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N2 - A new homologous series of oxycarbonate superconductors Sr2(Ca,Sr)n-1Cun(CO3)1-χ(BO3)χOy (n=1, 2 and 3) prepared under high pressure have been found by resistivity and magnetization measurements. X-ray powder diffraction and HRTEM studies show that these phases have tetragonal structures with a=3.86 A ̊ and c=7.40 A ̊ for n=1, a=3.86 A ̊ and c=10.62 A ̊ for n=2, and a=3.87 A ̊ and c=13.98 A ̊ for n=3. Resistivity and magnetization measurements revealed that superconducting transition temperatures were 50, 105 and 115 K for n=1-3, respectively. These Tc's are higher than those of the structurally related analogous TlBa2Can-1CunO2n+3 at 100 and 110 K (n=2 and 3).

AB - A new homologous series of oxycarbonate superconductors Sr2(Ca,Sr)n-1Cun(CO3)1-χ(BO3)χOy (n=1, 2 and 3) prepared under high pressure have been found by resistivity and magnetization measurements. X-ray powder diffraction and HRTEM studies show that these phases have tetragonal structures with a=3.86 A ̊ and c=7.40 A ̊ for n=1, a=3.86 A ̊ and c=10.62 A ̊ for n=2, and a=3.87 A ̊ and c=13.98 A ̊ for n=3. Resistivity and magnetization measurements revealed that superconducting transition temperatures were 50, 105 and 115 K for n=1-3, respectively. These Tc's are higher than those of the structurally related analogous TlBa2Can-1CunO2n+3 at 100 and 110 K (n=2 and 3).

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