نتایج جستجو برای: doped δ
تعداد نتایج: 75737 فیلتر نتایج به سال:
Efforts to understand the microscopic origin of superconductivity in cuprates are dependent on knowledge normal state. The Hall number low-temperature, high-field limit nH(0) has a particular importance because, within conventional transport theory, it is simply related charge carriers, so its evolution with doping gives crucial information about nature transport. Here we report study coefficie...
Electrode materials which exhibit high conductivities in both oxidising and reducing atmospheres are in high demand for solid oxide fuel cells (SOFCs) and solid oxide electrolytic cells (SOECs). In this paper, we investigated Cu-doped SrFe0.9Nb0.1O3-δ finding that the primitive perovskite oxide SrFe0.8Cu0.1Nb0.1O3-δ (SFCN) exhibits a conductivity of 63 Scm(-1)and 60 Scm(-1) at 415 °C in air and...
The objective of this work is to investigate the effect of Ag nanoparticles as the flux pinning centers. Ag nanoparticles with different particle sizes from 30 to 1000 nm were prepared through the chemical reduction of AgNO3 in an alcohol solution. Then, samples of YBa2Cu3O7-δ superconductors were doped by 1 and 2 weight percentage of Ag nanoparticles with different sizes. Samples were charac...
Reverse Water-Gas Shift (rWGS) is among the reactions with highest readiness level for technological implementation of CO2 utilization as an abundant and renewable carbon source, its transformation instance into synthetic fuels. Hence, great efforts are made in terms further development comprehension novel catalyst materials. To achieve excellent catalytic performance, catalytically active (nan...
Since the discovery of superconductivity in boron-doped diamond with a critical temperature (TC) near 4 K, great interest has been attracted in hard superconductors such as transition-metal nitrides and carbides. Here we report the new discovery of superconductivity in polycrystalline hexagonal ε-NbN synthesized at high pressure and high temperature. Direct magnetization and electrical resistiv...
We present magnetic properties of the three-band Hubbard model in the paraand antiferromagnetic phase on a hypercubic lattice calculated with the Dynamical Mean-Field Theory (DMFT). To allow for solutions with broken spin-symmetry we extended the approach to lattices with AB-like structure. Above a critical sublattice magnetization md ≈ 0.5 one can observe rich structures in the spectral-functi...
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