A spin wave represents a phase-coherent precession of microscopic vectors of magnetization in magnetic medium and can be considered as a magnetic analogue of a sound or light wave. Interest in propagating-spin-wave based devices has grown in the last few years largely due to advances in nanotechnology which allows shapes of geometrically confined magnonic elements to be fabricated, the development of new advanced experimental techniques for studying high-frequency magnetization dynamics and the potential use of spin waves as information carriers in spintronic applications. see more... |
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A clear reinvigoration of interest has been seen in the study of static and dynamic phenomena of magnetic vortices and other topologies ever since its first experimental evidence was reported in 1999 during a study of nanodisks with varying diameters and thicknesses. These topologies present potential application in the field of magnetic data storage, logic and sensing. see more... |
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Magnetic nanostructures, by virtue of their extremely small size possess different properties from their parent bulk material. Magnetization reversal mechanisms can be drastically modified in nanostructures confined to sizes that preclude the formation of domain walls. see more... |
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Recently, there has been growing interest in the fundamental understanding of spin wave (SW) propagation in magnonic crystals (MC), which are coupled periodic magnetic nanostructures conceived as the magnetic analogue of photonic crystals. The wavelength of SWs is several orders of magnitude shorter than that of electromagnetic waves; therefore magnonic crystal based devices offer better prospects for miniaturization in the gigahertz to terahertz range. see more... |
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Resistive switching (RS)refers to a voltage or current induced change in the resistance of a material from a low (ON) to high (OFF) value and vice versa. The switching from high to low resistance state is called SET/WRITE process and that from low to high resistance is called RESET/ERASE process. Resisitve switching has attracted a great deal of attention in the past decade due to its enormous potential as an ultra-high density and high speed non-volatile memory. see more... |
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Using nanotechnology, precisely controlled defects were introduced into a homogenous magnetic film. These controlled defects introduce dipolar fields which compete with the intrinsic anisotropy field of the film. see more... |
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Spin Dependent Transport in Nanomagnets Recently, we developed a novel synchronous transport measurement technique for probing the magnetic configurations in ferromagnetic rings electrically without placing the electrical contact leads directly on the nanostructures. This was achieved by fabricating the contact pads on magnetic nanowires attached to the nanostructures. see more... |
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