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Recent progress on the theoretical studies of fast magnetization reversal of Stoner particles is reviewed. The following results are discussed: (1) The Stoner–Wohlfarth (SW) limit becomes exact when the damping constant is infinitely large. Under the limit, magnetization moves along the steepest energy descent path. (2) For a given magnetic anisotropy, there is a critical damping constant, above which...
We demonstrate a graphene/nanotube hybrid phototransistor, in which photogating provided by the nanotube layer leads to a dramatically enhanced photoresponsivity (>100A/W) in the visible range, corresponding to ∼104 enhancement with respect to a graphene-only device.
A photodetector based on SWNT-graphene hybrid films and facile fabrication steps is demonstrated, which exhibits a remarkably high photoresponsivity of ∼ 100 A/W, across visible (400 nm) to the telecommunication wavelengths (1550 nm).
A two-dimensional ferromagnet is an interesting system both for basic understanding of magnetism and for spintronic applications. However, making such a system is not easy as ferromagnetism becomes more and more unstable with reducing the thickness of a ferromagnet. For example, in oxide systems such as SrRuO3, La1−xSrxMnO3, etc, ferromagnetism is lost around the thickness of a few unit cells [1,...
Previous conceptual design studies for liquid-metal (LM) cooled blankets of a fusion power plant often omit details of the complete flow distribution network required to bring coolant into and out of the blanket, and especially the manifolding required for the transition from a small number of feed pipes to the sometimes large number of parallel channels within the actively heated part of the power...
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