PREPARATION AND SUPERCONDUCTING PROPERTIES OF TETRAGONAL Ba//2YCu//3O//7// minus ////y//AND Ba//2 EuCuO//7 minus //Y WITH LOW OXYGEN-DEFECT CONCENTRATION (0. 05 less than y5 less than 2. 20).

Kyoichi Kinoshita, Azusa Matsuda, Takao Ishii, Naobumi Suzuki, Hiroyuki Shibata, Takao Wantanabe, Tomoaki Yamada

Research output: Chapter in Book/Report/Conference proceedingChapter

16 Citations (Scopus)

Abstract

Tetragonal phases of Ba//2YCu//3O//7// minus //y and Ba//2EuCu//3O//7// minus //y with low oxygen-defect concentration (0. 05 less than y less than 0. 20) are prepared by synthesis under high oxygen pressure (3-8 atms). As oxygen pressure increases during sintering, the crystal structure of synthesized samples changes from the orthorhombic to tetragonal phase and superconductivity is suppressed. Substitution of Y and Eu for Ba is observed to accompany the change to the tetragonal phase. Disordering of oxygen vacancies and such substitution may be vital for the absence of superconductivity because no strong correlation between T//c and oxygen-defect concentration is observed.

Original languageEnglish
Title of host publicationJapanese Journal of Applied Physics, Part 2: Letters
Pages795-798
Number of pages4
Volume27
Edition5
Publication statusPublished - 1988 May
Externally publishedYes

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Defects
Oxygen
Superconductivity
Substitution reactions
Oxygen vacancies
Sintering
Crystal structure

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kinoshita, K., Matsuda, A., Ishii, T., Suzuki, N., Shibata, H., Wantanabe, T., & Yamada, T. (1988). PREPARATION AND SUPERCONDUCTING PROPERTIES OF TETRAGONAL Ba//2YCu//3O//7// minus ////y//AND Ba//2 EuCuO//7 minus //Y WITH LOW OXYGEN-DEFECT CONCENTRATION (0. 05 less than y5 less than 2. 20). In Japanese Journal of Applied Physics, Part 2: Letters (5 ed., Vol. 27, pp. 795-798)

PREPARATION AND SUPERCONDUCTING PROPERTIES OF TETRAGONAL Ba//2YCu//3O//7// minus ////y//AND Ba//2 EuCuO//7 minus //Y WITH LOW OXYGEN-DEFECT CONCENTRATION (0. 05 less than y5 less than 2. 20). / Kinoshita, Kyoichi; Matsuda, Azusa; Ishii, Takao; Suzuki, Naobumi; Shibata, Hiroyuki; Wantanabe, Takao; Yamada, Tomoaki.

Japanese Journal of Applied Physics, Part 2: Letters. Vol. 27 5. ed. 1988. p. 795-798.

Research output: Chapter in Book/Report/Conference proceedingChapter

Kinoshita, K, Matsuda, A, Ishii, T, Suzuki, N, Shibata, H, Wantanabe, T & Yamada, T 1988, PREPARATION AND SUPERCONDUCTING PROPERTIES OF TETRAGONAL Ba//2YCu//3O//7// minus ////y//AND Ba//2 EuCuO//7 minus //Y WITH LOW OXYGEN-DEFECT CONCENTRATION (0. 05 less than y5 less than 2. 20). in Japanese Journal of Applied Physics, Part 2: Letters. 5 edn, vol. 27, pp. 795-798.
Kinoshita K, Matsuda A, Ishii T, Suzuki N, Shibata H, Wantanabe T et al. PREPARATION AND SUPERCONDUCTING PROPERTIES OF TETRAGONAL Ba//2YCu//3O//7// minus ////y//AND Ba//2 EuCuO//7 minus //Y WITH LOW OXYGEN-DEFECT CONCENTRATION (0. 05 less than y5 less than 2. 20). In Japanese Journal of Applied Physics, Part 2: Letters. 5 ed. Vol. 27. 1988. p. 795-798
Kinoshita, Kyoichi ; Matsuda, Azusa ; Ishii, Takao ; Suzuki, Naobumi ; Shibata, Hiroyuki ; Wantanabe, Takao ; Yamada, Tomoaki. / PREPARATION AND SUPERCONDUCTING PROPERTIES OF TETRAGONAL Ba//2YCu//3O//7// minus ////y//AND Ba//2 EuCuO//7 minus //Y WITH LOW OXYGEN-DEFECT CONCENTRATION (0. 05 less than y5 less than 2. 20). Japanese Journal of Applied Physics, Part 2: Letters. Vol. 27 5. ed. 1988. pp. 795-798
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