# Micron-sized planar transformer for electromagnetic flux guidance and confinement

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Absorption of electromagnetic radiation by 2D electrons at the surface of a quantum sphere placed in a weak magnetic field is studied. It is shown that at low temperatures, the absorption curve exhibits four resonance peaks observed in the Faraday geometry (photon wave vector parallel to the...

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Presents a study that compared a structure derived from a hemispherical source design with other conventional permanent magnet and electromagnet configurations. Importance of electronic devices; Discussion on electromagnets; Example of a conventional design of extended interaction amplifier magnet.

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The stationary dynamics of vortexlike domain walls in films with three magnetic axes and Goss orientation of the surface is studied for the first time with a micromagnetic method that exactly takes into account all basic types of interaction (including dipole-dipole interaction). Consideration...

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A method for efficiency enhancement in free-electron laser is studied which uses both tapered wiggler magnetic field and ion-channel density. Derivation of a set of nonlinear and coupled differential equations leads to the self-consistent description of the evolution of both an ensemble of...