Voltage-Tunable High-Frequency Ferrite Devices based on Non-Linear Magnetoelectric Interactions

基于非线性磁电相互作用的电压可调高频铁氧体器件

• 批准号: 1923732
• 负责人: Gopalan Srinivasan
• 金额: $ 40万
• 依托单位: Oakland University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1923732&HistoricalAwards=false
• 关键词: Voltage; Tunable; Frequency; Ferrite; Devices

Hexagonal ferrites are magnetic materials of choice for use in high frequency communication devices and radars due to low losses. The main drawback in such devices, however, is the need for a source of magnetic field to tune the operating frequency that requires very high power. Such tuning also makes them bulky and not compatible for integration with semiconductor devices. This project is aimed at a new generation of ferrite magnetic devices that are tunable by applying a voltage, and therefore, can be miniaturized and integrated with semiconductor electronics. The project is motivated by recent reports on strong interaction between the magnetic ordering in the ferrite and electric field generated by the applied voltage, resulting in voltage control of magnetic parameters. Primary tasks of the proposed research are to grow high quality thin films and single crystals of hexagonal ferrites, studies on the nature of interaction between magnetic order and electric field, and design, fabrication and characterization of ferrite filters and resonators for use in the frequency bands of interest for consumer electronics and systems of importance for the national defense. Broader impacts of the research include research training in advanced materials synthesis and measurement techniques for undergraduate and graduate students and research experience for high school students. High school juniors and seniors, women and minorities in particular, will be recruited from local schools to facilitate participation in research. A research program is proposed on non-linear magnetoelectric (NLME) interactions and electric field control of magnetism in M-type hexagonal ferrites. The motivation is the recent discovery of the phenomenon in single crystals films of strontium hexaferrite (SrM). Under a static electric field E, the ME interactions in a thick film of SrM resulted variation in the magnetic order parameters and manifested as tuning of ferromagnetic resonance (FMR). Studies are planned on single crystal platelets and thin films of pure, and (Co, Ti) and (Co,Sn) substituted Ba and Sr hexaferrites. These systems have uniaxial anisotropy fields Ha = 4-20 kOe with FMR in the frequency range 10-50 GHz. Single crystals are on hand and thin films will be grown by liquid phase epitaxy (LPE) on a variety of substrates including MgO and sapphire. Studies on NLME effects are to be done by observation and tuning of FMR under multi-domain and single domain states for DC, sinusoidal and pulsed E-fields. Data on E-tuning of FMR will be used to estimate variations in magnetic order parameters and NLME coupling coefficients and their dependence on sample and input electrical parameters. An important component of the proposed research is the design of hexaferrite resonators and band-stop and band-pass filters for use at 10-50 GHz and characterization in terms of E-tuning and device figures of merit. Avenues for enhancing device tunability and figures of merit and reduction of electric power requirements will be explored. Models will be developed for the non-linear ME interactions.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

六边形铁氧体是由于低损失而导致的高频通信设备和雷达的首选磁性材料。 但是，这种设备中的主要缺点是需要磁场来源来调整需要非常高功率的工作频率。 这种调整也使其笨重，并且与半导体设备集成不兼容。 该项目针对新一代的铁氧体磁性设备，这些设备可通过施加电压来调整，因此可以将其小型化并与半导体电子设备整合在一起。 该项目的动机是由于施加电压产生的铁氧体和电场中的磁取顺序之间的强烈相互作用的最新报道，从而导致磁参数的电压控制。 拟议的研究的主要任务是种植高质量的薄膜和六角铁氧体的单晶，对磁性和电场之间相互作用的性质的研究，以及在消费者电子学的频率频段中使用铁氧体过滤器和谐振器的设计，制造和表征，以及对国防国防的重要性。 该研究的更广泛影响包括针对本科生和研究生的高级材料合成和测量技术的研究培训以及高中生的研究经验。 高中大三学生，尤其是妇女和少数民族，将从当地学校招募以促进研究。提出了针对M型六边形铁素体中磁性的非线性磁电（NLME）相互作用和电场控制的研究计划。 动机是最近在跨二脂质（SRM）的单晶膜中发现了现象。 在静态电场E下，SRM厚膜中的ME相互作用导致磁顺序参数变化，并表现为铁磁共振（FMR）的调整。 计划在单晶血小板和纯膜以及（CO，Ti）和（CO，SN）取代的BA和SR Hexaferrites上进行研究。 这些系统具有单轴各向异性场HA = 4-20 KOE，fMR在10-50 GHz的频率范围内。 单晶在手上，薄膜将通过液相外延（LPE）在包括MGO和SAPPHIRE在内的各种底物上生长。 NLME效应的研究应通过在多域和单个结构域状态下的直流，正弦和脉冲电子场的观察和调整来完成。 FMR的电子调整数据将用于估计磁性参数和NLME耦合系数的变化及其对样品和输入电参数的依赖性。拟议的研究的一个重要组成部分是设计六角形谐振器，频道和带通滤波器，可在10-50 GHz使用，以及在E-tuning和功绩的表征方面的特征。将探索提高设备可调性和功绩数字和降低电力需求的数字的途径。该奖项将针对非线性ME互动开发。该奖项反映了NSF的法定任务，并被认为是使用基金会的知识分子优点和更广泛的影响评论标准的评估值得支持的。

项目成果

Non-reciprocal voltage–current and impedance gyration effects in ferrite/piezoelectric toroidal magnetoelectric composites

• DOI: 10.1063/5.0038722
• 发表时间: 2021-01
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Jitao Zhang;Bingfeng Ge;Qingfang Zhang;D. Filippov;Jie Wu;Jiagui Tao;Zicheng Jia;Liying Jiang;Lingzhi Cao;G. Srinivasan

Effects of magnetic-elastic anisotropy on magnetoelectric gyrator with ferrite/PZT/ferrite laminate for enhancement of power conversion efficiencies

• DOI: 10.1016/j.jmmm.2021.168451
• 发表时间: 2021-08
• 期刊: Journal of Magnetism and Magnetic Materials
• 影响因子: 2.7
• 作者: Jitao Zhang;Kang Li;Qingfang Zhang;D. Filippov;Jie Wu;Jiagui Tao;Jing Chen;Liying Jiang;Lingzhi Cao;G. Srinivasan

Strong Converse Magnetoelectric Effect in a Composite of Weakly Ferromagnetic Iron Borate and Ferroelectric Lead Zirconate Titanate

• DOI: 10.1103/physrevapplied.14.034039
• 发表时间: 2020-09-15
• 期刊: PHYSICAL REVIEW APPLIED
• 影响因子: 4.6
• 作者: Popov, M.;Liu, Y.;Srinivasan, G.
• 通讯作者: Srinivasan, G.

Strain Control of Magnetic Anisotropy in Yttrium Iron Garnet Films in a Composite Structure with Yttrium Aluminum Garnet Substrate

钇铝石榴石基体复合结构中钇铁石榴石薄膜磁各向异性的应变控制

• DOI: 10.3390/jcs6070203
• 发表时间: 2022
• 期刊: Journal of Composites Science
• 影响因子: 3.3
• 作者: Liu, Ying;Zhou, Peng;Bidthanapally, Rao;Zhang, Jitao;Zhang, Wei;Page, Michael R.;Zhang, Tianjin;Srinivasan, Gopalan
• 通讯作者: Srinivasan, Gopalan

High-Performance Piezoelectric Nanogenerator Based on Low-Entropy Structured Nanofibers for a Multi-Mode Energy Harvesting and Self-Powered Ultraviolet Photodetector

• DOI: 10.1021/acsaelm.2c00411
• 发表时间: 2022-05-30
• 期刊: ACS APPLIED ELECTRONIC MATERIALS
• 影响因子: 4.7
• 作者: Qin, Wancheng;Zhou, Peng;Zhang, Tianjin
• 通讯作者: Zhang, Tianjin