منابع مشابه
environmental effects of gol-e-gohar iron ore mine on groundwater of the area
gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...
New Fe - based Superconductors The Iron Age of High - Temperature Superconductivity
Root of a Carbon nanotube on the sub-strate with elongated catalyst particle Rolled up AlGaAs/Cr/Pt microtube Corrosion pit generated on a shot-peened Zr-based bulk metallic glass Lattice structure of a typical edge-shared chain cuprate: Li 2 CuO 2 In February 2008, a paper appeared showing superconductivity in a layered iron arse-nide material with a transition temperature (T c) of 26K[1]. Thi...
متن کاملHigh-temperature superconductivity in the iron pnictides
In January of this year, a preprint appeared from the group of Hideo Hosono in Japan showing the existence of superconductivity in a layered iron arsenide material with a transition temperature (Tc) of 26 K [1]. The paper grew out of an earlier study that found a Tc of 5 K in the phosphide analogue [2]. In some ways the story looked very similar to what had been found 22 years earlier in the cu...
متن کاملThe Qom Plain at the End of Bronze and the Beginning of Iron Age
From the cultural-geographical perspective, the Qom plain is part of the cultural area of the Central Plateau of Iran. Archaeologically, this region had many contacts with other areas of the Central Plateau such as the plains of Kāshān, Sāveh, Qazvin, and Rey. It also had relations with the synchronous centers in the northeast, northwest, central Zāgros, and Khuzestān plain. This is due to it...
متن کاملExperimental aspects of Alpha, Beta angles distortion on superconductivity in 1111-type Iron-based superconductor
In this research, we aim to clarify the relationship between the structural distortion due to doping and the superconductivity existence in the FeAs4 structure. For this, we have prepared polycrystalline of NdFeAsO0.8F0.2, NdFeAs0.95Sb0.05O0.8F0.2 and Nd0.99Ca0.01FeAsO0.8F0.2 samples by one-step solid state reaction method. The structural and electrical properties of the samples were characteri...
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ژورنال
عنوان ژورنال: Physics
سال: 2008
ISSN: 1943-2879
DOI: 10.1103/physics.1.28