Journal ArticleDOI
XPS Study on the Formation Process of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System
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TLDR
In this article, the formation of the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O superconducting system was investigated using X-ray photoemission spectroscopy (XPS) measurements.Abstract:
X-ray photoemission spectroscopy (XPS) measurements were carried out to investigate the changes in the Cu ion valency through the formation of the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O superconducting system. The Cu2+ composition increased rapidly in the initial stages of sintering and became saturated, whereas the Cu+ and Cu3+ compositions showed a systematic change, within a certain sintering time, dependent on the sintering temperature. It was found that these changes in the Cu ion valency reflect the structural change in the formation of the high-Tc phase in this system.read more
Citations
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Hole-doped La1.85Sr0.15CuO4-δXσ(X=F, Cl) and electron-doped Nd1.85Ce0.15CuO4-δXσ halo-oxide catalysts for the selective oxidation of ethane to ethene
TL;DR: In this article, the catalytic performance and characterization of Ln1.85A0.15CuO4−δXσ (Ln=La, Nd; A=Sr, Ce; X=F, Cl) for the oxidative dehydrogenation of ethane (ODE) to ethene have been investigated.
Journal ArticleDOI
YBa2Cu3O7−δXσ (X=F and CI): Highly Active and Durable Catalysts for the Selective Oxidation of Ethane to Ethene
TL;DR: In this article, the performance and characterization of YBa2Cu3O7−δ and Yba2Cu 3O7+δXσ for the oxidative dehydrogenation of ethane (ODE) to ethene have been investigated.
Journal ArticleDOI
Halo-oxide ACuO2−δXσ (A=Sr0.63Ca0.27, X=F, Cl) catalysts active and durable for ethane selective oxidation to ethene
TL;DR: In this article, the performance and characterization of ACuO 2− δ (A=Sr 0.63 Ca 0.6, Ca 0, Cl 0.7 molar ratio) pulse studies were investigated for the ODE reaction.
Journal ArticleDOI
Halide-doped perovskite-type AMn1−xCuxO3−δ (A = La0.8Ba0.2) catalysts for ethane-selective oxidation to ethene
TL;DR: The undoped and halide-doped perovskite-type oxide AMn 1− x Cu x O 3− δ (A=La 0.8 Ba 0.2 ) catalysts have been investigated for the oxidative dehydrogenation of ethane (ODE) to ethene.
Journal ArticleDOI
Halogenated La1.6Sr.04CuO4 catalysts active for ethane selective oxidation to ethene
TL;DR: In this article, the performance and characterization of the catalysts La1.6Sr0.856Cl 0.852, La 1.4CuO3.857F 0.143, and La 1 6Sr 0.126 have been investigated for the ODE reaction.
References
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Journal ArticleDOI
Sputter deposition of BiSrCaCuO thin films
Masao Fukutomi,Junichi Machida,Yoshiaki Tanaka,Toshihisa Asano,Hiroshi Maeda,Kazutomo Hoshino +5 more
TL;DR: In this article, the sputter deposition of superconducting Bi-Sr-Ca-Cu-O thin films was studied with particular reference to the relation between the deposition conditions and the superconding properties of the obtained.
Journal ArticleDOI
Assignment of the powder x-ray diffraction pattern of superconductor bi2(sr, ca)3-xcu2oy
TL;DR: In this paper, the powder X-ray diffraction pattern of superconductor Bi2(Sr, Ca)3-xCu2Oy was assigned taking into account the satellite reflections arising from an incommensurate modulated structure.
Journal ArticleDOI
Upper Critical Field of SrxLa2-xCuO4-y
Hideo Ihara,Masayuki Hirabayashi,Norio Terada,Kenichi Bushida,Makio Akimoto,Norio Kobayashi,Naoki Toyota,Yoshio Muto +7 more
TL;DR: The electrical resistance of SrxLa2-xCuO4-y has been measured under magnetic fields up to 21.1 T between 4.2 and 50 K as mentioned in this paper.
Journal ArticleDOI
XPS Study of Bi–Sr–Ca–Cu–O Superconducting Thin Films Prepared by the rf-Sputtering Method
TL;DR: In this paper, the charge fluctuation of Cu ions in the superconducting Bi-Sr-Ca-Cu-O system was investigated using X-ray photoemission spectroscopy in thin films prepared by the rf-sputtering method.