Annenkov Alexander Yu, Gerus Sergey V., Lock Edwin H. Superdirectional beam of surface spin wave. EPL (Europhysics Letters) , 2018 , 123 (4). 44003-p1-44003-p7. ISSN 0295-5075
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The visualized diffraction patterns of surface spin wave excited by arbitrarily oriented linear transducer are investigated experimentally in the plane of tangentially magnetized ferrite film for the case where the transducer length D is much larger than the wavelength λ0. It is shown experimentally and theoretically that the angular width of diffracted surface spin wave beam in anisotropic ferrite film can take values greater or less than λ0/D and can also be zero. For the last case superdirectional (nonexpanding) beam of the surface spin wave is observed experimentally: the smearing of the beam energy along the film plane is absent and the length of the beam trajectory is maximal (~50 mm). It is found, that well known Rayleigh criterion used in isotropic media can’t be used to estimate the angular width of spin wave beams. The experimental results are in good agreement with theoretical investigations, predictions, calculations and formulas obtained recently.
| Тип объекта: | Статья |
|---|---|
| Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!: | Анненков А.Ю., Герус С.В., Локк Э.Г. |
| Подразделения (можно выбрать несколько, удерживая Ctrl): | 258 лаб. исследования СВЧ свойств ферромагнитных материалов |
| URI: | http://cplire.ru:8080/id/eprint/4847 |
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