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首页> 外文期刊>Proceedings of the IEEE >An overview of electromagnetic and spin angular momentum mechanical waves in ferrite media
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An overview of electromagnetic and spin angular momentum mechanical waves in ferrite media

机译：铁氧体介质中的电磁和自旋角动量机械波概述

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摘要

The principal characteristics of gyromagnetic materials that are useful for microwave applications are reviewed, and both the large-signal and small-signal models that govern wave propagation at microwave frequencies are given. Uniform and nonuniform plane waves in an unbounded ferrite medium are considered from the complementary viewpoints of electromagnetics and mechanics. Both electromagnetic and quantum-mechanical exchange channels of power exist in such materials, which can be ascribed to either waves or quasiparticles. Regimes of wave propagation that are magnetostatic in character are shown to exist, as well as the relationships between the Walker modes of a small spheroid and the magnetostatic wave propagation in thin films. When the power densities within these waves or modes exceed certain thresholds, the linear model breaks down and parametric instabilities can create a form of magnetic turbulence. The thresholds for both first-order and second-order processes that involve the uniform precession mode and parallel-pumping process that do not are reviewed.
机译：回顾了可用于微波应用的旋磁材料的主要特性，并给出了控制微波频率下波传播的大信号模型和小信号模型。从电磁学和力学的互补观点考虑了无界铁氧体介质中的均匀和非均匀平面波。此类材料中同时存在电磁和功率的量子机械交换通道，它们可以归因于波或准粒子。显示出存在具有静磁特性的波传播机制，以及小球体的沃克模式与薄膜中的静磁波传播之间的关系。当这些波或模式中的功率密度超过某些阈值时，线性模型将崩溃，参数不稳定性会产生某种形式的磁湍流。涉及统一进动模式和并行泵送过程的一阶和二阶过程的阈值均未审查。

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