Magnetostrictive multilayers for magneto-electric sensors - layer structure and magnetic domains

用于磁电传感器的磁致伸缩多层膜 - 层结构和磁畴

• 批准号: 269913640
• 负责人: Professor Dr.-Ing. Jeffrey McCord
• 金额: --
• 依托单位: Arbeitsgruppe Nanoscale Magnetic Materials - Magnetic Domains
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/269913640?language=en
• 关键词: Magnetostrictive; multilayers; magneto; electric; sensors

The focus of the project is research on novel magnetostrictive components for magneto-electric 2-2 structures with a strong emphasis on the relevant magnetic domain processes for highly sensitive magnetic field sensors in different application scenarios. Within the project, the conditions for the use of known and also new magnetic materials, material combinations, and alternative approaches for the preparation of optimized magneto-electric composites are to be evaluated. For this purpose sputtered magnetic multilayer film systems with high piezomagnetic coefficients will be investigated. In addition to the influence of the effective magnetic material parameters on the magneto-electric response, the influences of the microstructure and the associated magnetic domain structure will be central to our studies in order to achieve a low limit of detection for the sensors. Interfacial and magnetostatic coupling phenomena are used to control the behavior of the magnetostrictive phase of the sensors.Through modeling and spatially resolved magnetic characterization methods, an understanding of the functional relevant magnetic processes of structured magneto-electric multilayers will be achieved. Known limitations in the detection of low frequency signals through exhibited Barkhausen noise will be eliminated. Therefore, e.g. in combination with exchange biased layers, novel layer systems will be systematically investigated. A special emphasis of the research lies in the analysis of the influences of different processing parameters on magnetic domain structure and the corresponding sensor noise exhibited by the devices. Fundamental knowledge obtained from simple model structures will be transferred to technical sensor structures. Moreover, innovative material combinations that can withstand higher processing temperatures will be investigated. In order to achieve high thermal stability together with high piezomagnetic coefficients FeCo/TiN multilayer structures will be explored. Moreover, alternative approaches for sensor structures with highest sensitivity will be investigated. The material and physical foundations for highly sensitive magneto-electric sensors will be developed. The results of the research are expected to lead to 2-2 magneto-electric composites with greatly improved magnetic properties.

项目重点研究磁电2-2结构的新型磁致伸缩元件，重点研究不同应用场景下高灵敏度磁场传感器的相关磁畴工艺。在该项目中，将评估使用已知和新的磁性材料、材料组合以及制备优化磁电复合材料的替代方法的条件。为此，我们将研究具有高压磁系数的溅射磁性多层膜系统。除了有效磁性材料参数对磁电响应的影响外，微观结构和相关磁畴结构的影响将是我们研究的核心，以实现传感器的低检测极限。利用界面和静磁耦合现象控制传感器的磁致伸缩相位行为。通过建模和空间分辨的磁性表征方法，将实现对结构磁电多层膜功能相关磁性过程的理解。通过展示巴克豪森噪声检测低频信号的已知限制将被消除。因此，例如，结合交换偏置层，新的层系统将被系统地研究。研究重点在于分析不同工艺参数对器件磁畴结构和相应传感器噪声的影响。从简单模型结构中获得的基础知识将转移到技术传感器结构中。此外，将研究能够承受更高加工温度的创新材料组合。为了获得高的热稳定性和高的压磁系数，FeCo/TiN多层结构将被探索。此外，将研究具有最高灵敏度的传感器结构的替代方法。高灵敏度磁电传感器的材料和物理基础将得到发展。研究结果有望导致磁性能大大提高的2-2磁电复合材料。

项目成果

Electrically modulated magnetoelectric sensors

• DOI: 10.1063/1.4948470
• 发表时间: 2016-05-02
• 期刊: APPLIED PHYSICS LETTERS
• 影响因子: 4
• 作者: Hayes, P.;Salzer, S.;Quandt, E.
• 通讯作者: Quandt, E.

Exchange biased magnetoelectric composites for magnetic field sensor application by frequency conversion

• DOI: 10.1063/1.4913814
• 发表时间: 2015-05-07
• 期刊: JOURNAL OF APPLIED PHYSICS
• 影响因子: 3.2
• 作者: Roebisch, V.;Yarar, E.;Meyners, D.
• 通讯作者: Meyners, D.

Domain structure and reorientation in CoF e 2 O 4

• DOI: 10.1103/physrevb.93.195427
• 发表时间: 2016-05
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: M. Abes;C. Koops;S. Hrkac;J. McCord;N. O. Urs;N. Wolff;L. Kienle;W. Ren;L. Bouchenoire