Dispersion characteristics of spin-electromagnetic waves in planar multiferroic structures

Abstract

A method of approximate boundary conditions is used to derive dispersion relations for spin-electromagnetic waves (SEWs) propagating in thin ferrite films and in multiferroic layered structures. A high accuracy of this method is proven. It was shown that the spin-electromagnetic wave propagating in the structure composed of a thin ferrite film, a thin ferroelectric film, and a slot transmission line is formed as a result of hybridization of the surface spin wave in the ferrite film and the electromagnetic wave in the slot-line. The structure demonstrates dual electric and magnetic field tunability of the SEW spectrum. The electric field tunability is provided by the thin ferroelectric film. Its efficiency increases with an increase in the thicknesses of the ferrite and ferroelectric films and with a decrease in the slot-line gap width. The theory is confirmed by experimental data.

Dynamic electromagnonic crystal based on artificial multiferroic heterostructure

“…First, the dispersion characteristics for SEWs propagating in the regular parts of the periodic waveguide were calculated using a theory reported in ref. 29 . The experimentally determined dependence of ε on the applied voltage U was used in these calculations (see the Eq.…”

Температурные Свойства Диэлектрической Проницаемости И Оптические Свойства Многослойной Структуры Вариозонного Титаната Бария-Стронция

“…Переход на радиофотонные методы генерации и управление излучением в СВЧ и THz полосе позволяет создать адаптивные фазированные антенные решетки с электронным или оптическим сканированием луча в пространстве [1]. Для успешного решения этой задачи необходимо создание оптически и электрические управляемых микроэлектронных структур фазовращателей СВЧ и THz диапазона на основе новых сегнетоэлектрических материалов и структур [2]. Такие фазовращатели могут быть созданы на базе сегнетоэлектрических материалов (сегнетоэластиков) или сегнетоэлектрических структур, обладающих размытым фазовым переходом в широком температурном диапазоне и имеющих малые потери в диапазоне СВЧ и THz [3].…”

Electromagnonic crystals based on ferrite–ferroelectric–ferrite multilayers

“…Further progress in the development of voltage‐controlled novel devices can be achieved by fabrication of the layered structures based on MCs [13–25]. In particular, an electrodynamic interaction between high‐frequency electromagnetic and spin waves leads to a formation of the hybrid spin‐electromagnetic waves (SEWs) in the ferrite–ferroelectric layered structures [26–33]. By analogy to natural multiferroic solids, the quanta of these waves are considered as electro‐active magnons or electromagnons.…”