Magnetostatic Modes and Losses in Planar Microwave Ferrites with Inhomogeneous Magnetization Distribution

磁化分布不均匀的平面微波铁氧体的静磁模式和损耗

• 批准号: 9707859
• 负责人: Martha Pardavi-Horvath
• 金额: $ 5.76万
• 依托单位: George Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-15 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9707859&HistoricalAwards=false
• 关键词: Magnetostatic; Modes; Losses; Planar; Microwave

Proposal Number: ECS-9707859 Principal Investigator: Martha Parvidi-Horvath/ George Washington University Title: Career Advancement Award: Magnetostatic modes and losses in planar microwave ferrites with inhomogeneous magnetization distribution An extension of the Principal Investigator's research in magnetism and magnetic materials to microwave phenomena and measurements, and microwave magnetism in monolithic microwave integrated circuits (MMICs) will be performed. A key problem in MMICs, the performance of the ferrite devices within such circuits as the circuits become smaller in size, and as they are required to operate at higher frequencies, will be investigated. It is known but not understood that the performance of the ferrite circulator within the MMIC depends very strongly on the ferrite thickness. The Principal Investigator will calculate analytically and numerically the magnetostatic modes in the microwave spectra of planar ferrite with inhomogeneous magnetization distribution. The validity of the theoretical work will be also checked by measuring the thickness dependence of the Ferromagnetic Resonance Spectra of a series of thick single crystal ferrite films. The results will be disseminated through journal publications, conference participation and the development of an undergraduate research program and revised laboratory course which includes microwave magnetism.

提案编号：ECS-9707859 主要研究者：Martha Parvidi-Horvath/乔治华盛顿大学 标题：职业发展奖：具有非均匀磁化分布的平面微波铁氧体的静磁模式和损耗 首席研究员在磁性和磁性材料的微波现象和测量，微波磁性在单片微波集成电路（MMIC）的研究扩展将被执行。MMIC中的一个关键问题是，随着电路尺寸变小，以及要求在更高频率下工作，这种电路中的铁氧体器件的性能将被研究。 已知但不理解的是，MMIC内的铁氧体环行器的性能非常强烈地依赖于铁氧体厚度。 主要研究者将分析和数值计算具有不均匀磁化分布的平面铁氧体的微波谱中的静磁模式。 理论工作的有效性也将通过测量一系列厚的单晶铁氧体薄膜的铁磁共振谱的厚度依赖性来检验。 结果将通过期刊出版物，会议参与和本科生研究计划的发展和修订实验室课程，其中包括微波磁学传播。