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Elastic Wave Radiation from Simply-Vibrating 180° Magnetic Domain Walls

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A vibrating magnetic domain wall generates elastic waves through magnetoelastic coupling. (Only the 180° ferromagnetic wall is considered here.) Using available parameters for ferrites, it is found that a plane vibrating 180° wall can generate shear waves, propagating normal to the wall, with a strain amplitude as high as 5 × 10−10.

Unfortunately, the parameters used may not be reliable at the frequencies of interest (Mc/s) and certain approximations of unknown validity have been made in arriving at the strain amplitudes. It seems as if the best test of the calculation would be an attempt to observe elastic wave generation by a single vibrating wall as in a “window-frame-crystal”.
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Document Type: Research Article

Publication date: January 1, 1967

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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