Renormalized resonance frequencies of a ferrite sphere coupled to an LR circuit: Comparison of theory and experiment

被引：0

作者：

English, LQ ^{[1
]}

Kerestes, C ^{[1
]}

Rydzag, G ^{[1
]}

机构：

[1] Dickinson Coll, Dept Phys & Astron, Carlisle, PA 17013 USA

来源：

CONCEPTS IN MAGNETIC RESONANCE PART B-MAGNETIC RESONANCE ENGINEERING | 2005年 / 24B卷 / 01期

关键词：

ferromagnetic resonance; dynamic susceptibility; YIG spheres; magnetostatic modes; coupling to magnetic resonance; frequency renormalization; microwave coupling structures; magnetic feedback;

D O I：

10.1002/cmr.b.20026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We derive a formula for the AC susceptibility of a ferrite spherical resonator coupled to an LR circuit by formulating the problem in terms of a feedback mechanism. This technique allows us to find an analytical expression for the dependence of the shift in resonance frequency on the loop-crystal coupling strength, the circuit parameters, and the saturation magnetization of the ferrite. Finally, we compare these predictions to experimental results on YIG and Ga:YIG spheres. This coupling provides a simple way of tuning the uniform mode frequency relative to the spin-wave spectrum. (C) 2005 Wiley Periodicals, Inc.

引用

页码：39 / 45

页数：7