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Ferroelectric Liquid Crystal Conglomerates
Ferroelectric Liquid Crystal Conglomerates

Exchange Coupling of Co and Fe on Antiferromagnetic NiO
Exchange Coupling of Co and Fe on Antiferromagnetic NiO

Navy Electricity and Electronics Training Series
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... configuration then occurs which -- once formed -- is extremely stable for some elements. [For some other elements capable of forming ORMEs, much greater excitation levels are required. Stability is also lower.] Here is how the transition into an ORME works from an observational standpoint. Assume an ...
Mercury(II) Removal with Modified Magnetic Chitosan Adsorbents
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... which is attributed to: (i) the form of chitosan (beads, powder), (ii) the possible chemical modifications (cross-linking, grafting reactions), (iii) the different experimental conditions (pH, particle size, conditioning, and composition of the solution), which are not systematically the same [4]. T ...
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Ultracold Collisions in Atomic Strontium

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... One might well wonder why rubbing a rubber rod with animal fur would cause electrons to be transferred from the fur to the rod. If one could imagine some way that even one electron might, by chance, find its way from the fur to the rod, it would seem that, then, the rod would be negatively charged a ...
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Voltage-dependent electron distribution in a small spin valve

... transferred from the spin-polarized current to the magnetization of the free layer by the mechanism of incoherent magnon emission. Our approach is based on the rate equation for the magnon occupation, using Fermi’s golden rule for magnon emission and absorption and the nonequilibrium electron distri ...
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... Electric force is inversely proportional to the distance squared. As distance decreases and charges remain the same, the force increases as the square of the distance. 30. Explain how to charge a conductor negatively if you have only a positively charged rod. (20.2) Bring the conductor close to, but ...
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Superconductivity



Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics.The electrical resistivity of a metallic conductor decreases gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of a normal conductor shows some resistance. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source.In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (−183 °C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. Liquid nitrogen boils at 77 K, and superconduction at higher temperatures than this facilitates many experiments and applications that are less practical at lower temperatures.
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