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121.
Superconducting Double Perovskite Bismuth Oxide Prepared by a Low‐Temperature Hydrothermal Reaction
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Mirza H. K. Rubel Prof. Akira Miura Prof. Takahiro Takei Prof. Nobuhiro Kumada M. Mozahar Ali Prof. Masanori Nagao Prof. Satoshi Watauchi Prof. Isao Tanaka Prof. Kengo Oka Prof. Masaki Azuma Prof. Eisuke Magome Prof. Chikako Moriyoshi Prof. Yoshihiro Kuroiwa Prof. A. K. M. Azharul Islam 《Angewandte Chemie (International ed. in English)》2014,53(14):3599-3603
Perovskite‐type structures (ABO3) have received significant attention because of their crystallographic aspects and physical properties, but there has been no clear evidence of a superconductor with a double‐perovskite‐type structure, whose different elements occupy A and/or B sites in ordered ways. In this report, hydrothermal synthesis at 220 °C produced a new superconductor with an A‐site‐ordered double perovskite structure, (Na0.25K0.45)(Ba1.00)3(Bi1.00)4O12, with a maximum Tc of about 27 K. 相似文献
122.
If G is a compact connected Lie group and T is a maximal torus, we give a wedge decomposition of ΣG/T by identifying families of idempotents in cohomology. This is used to give new information on the self-maps of G/T. 相似文献
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Yoshiro Azuma Thomas R. Dyke Gretchen K. Gerke Timothy C. Steimle 《Journal of Molecular Spectroscopy》1984,108(1):137-142
Doppler-limited, laser-induced fluorescence spectra on the B1Σ+-X1Σ+ (v′ = v″ = 0 and 1) system of MgO have been obtained. The results of the optical analysis were merged with our microwave-optical double-resonance measurements to produce the following set of spectroscopic parameters for the B and X states, where the units are in cm?1, and the uncertainties represent 95% confidence limits: T′0.0 = 20003.594(2); B′0 = 0.58004(3); D′0 = 1.13(2) × 10?6; B″0 = 0.57198(3); D″0 = 1.20(2) × 106; T′1.1 = 20043.423(2); B′1 = 0.57528(4); D′1 = 1.14(11) × 106; B″1 = 0.56674(4); D″1 = 1.22(10) × 106. 相似文献
126.
The adsorption of Si on polycrystalline tungsten surfaces was studied for the first time by means of thermal desorption. Instead of the main peak of Si (), the isotope () contained naturally (~3%) was monitored by mass spectrometry. This method can reduce the contribution from CO to the mass signal of Si. Two desorption peaks were observed at 1480 and 1820 K. The activation energies for the desorption were estimated to be about 90 and 110 kcal/mol, respectively. 相似文献
127.
We propose a classification of an infinite series of the static solutions to the vacuum Einstein equation by means of their
soliton number and the real and/or complex pole trajectories. We also show that in the 4-soliton solution there appears an
intriguing ring solution of which the curvature invariant has a finite limit at the rings. 相似文献
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P. Schmalbrock H.W. Becker L. Buchmann J. Görres K.U. Kettner W.E. Kieser H. Kräwinkel C. Rolfs H.P. Trautvetter J.W. Hammer R.E. Azuma 《Nuclear Physics A》1983,398(2):279-307
The reaction 20Ne(α, γ)24Mg has been investigated at Eα(lab) = 0.55–3.20 MeV. Neon gas enriched to 99.95% in 20Ne was recirculated in differentially pumped gas target systems of the extended and quasipoint jet types. New resonances were found at Eα(lab) = 958, 1226, 1260, 1704 and 2277 keV, which correspond to known states in 24Mg. Excitation energies, γ-ray decay schemes, γ-ray angular distributions, resonance widths and strengths as well as Jπ and T-assignments are reported for all the resonances. Information on low-lying states in 24Mg is also obtained. The nuclear and astrophysical aspects of the results are discussed. 相似文献