نتایج جستجو برای: quasicrystal
تعداد نتایج: 871 فیلتر نتایج به سال:
Decagonite is the second natural quasicrystal, after icosahedrite (Al63Cu24Fe13), and the first to exhibit the crystallographically forbidden decagonal symmetry. It was found as rare fragments up to ~60 mm across in one of the grains (labeled number 126) of the Khatyrka meteorite, a CV3 carbonaceous chondrite. The meteoritic grain contains evidence of a heterogeneous distribution of pressures a...
Metal oxides display a variety of crystal structures which often are more complicated compared to the parent metals [1]. In particular, the oxide structures grown on ordered aluminum binary alloys have been an immense challenge for scientists since decades [2]. On NiAl(110), oxygen binds to Al and forms an atomically thin layer of super-cell epitaxy with a huge unit cell. We investigate the str...
The mechanically alloyed amorphous alloys of the Ti45Zr38Ni17 composition are known for their ability to form a quasicrystalline state after thermal treatment. It is also that and quasicrystal belonging family able store hydrogen yield gravimetric densities above 2 wt.%. In this contribution, we report results research on system with vanadium doped instead titanium. We found samples moderate do...
An active one-dimensional Fibonacci photonic quasi-crystal is realized via spin coating. Luminescence properties of an organic dye embedded in the quasi-crystal are studied experimentally and compared to theoretical simulations. The luminescence occurs via the pseudo-bandedge mode and follows the dispersion properties of the Fibonacci crystal. Time resolved luminescence measurement of the activ...
Magnetism of Tsai-type 1/1 approximants has been extensively investigated for the last decade. The experimental results on are reviewed and magnetic behaviors classified discussed in terms average electron-per-atom (e/a) ratio. paramagnetic Curie-Weiss temperature ?p is found to oscillate a universal manner as function e/a ratio, order systematically changes with variation ?p. In addition, rece...
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