Exploring Exchange Interactions at Perovskite Oxide Interfaces

探索钙钛矿氧化物界面的交换相互作用

• 批准号: 1411250
• 负责人: Yayoi Takamura
• 金额: $ 42.43万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-15 至 2018-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1411250&HistoricalAwards=false
• 关键词: Exploring; Exchange; Interactions; Perovskite; Oxide

NON-TECHNICAL DESCRIPTION: This project focuses on the development of new artificial layered materials that advance the fundamental understanding of nanoscience at the atomic level. These materials have applications in next generation devices (spintronic and orbitronic) which have been predicted to display significant improvements in device speed and energy efficiency over conventional electronic devices. The key lies in harnessing the unexpected physical phenomena that result from the changes in structure and chemistry which occur over nanometer scales at surfaces and interfaces of perovskite oxides. Outreach activities include support for the UC Davis Science, Technology, Engineering, and Mathematics Transfer Day which targets educationally disadvantaged and underrepresented groups from Mathematics Engineering Science Achievement programs in Northern California.TECHNICAL DETAILS: The goal of this project is to develop a fundamental understanding of interfacial phenomena such as exchange coupling interactions at interfaces between ferromagnetic and antiferromagnetic layers. Perovskite oxides are ideal candidate materials for these studies due to their wide range of functional properties that result from the strong coupling between the charge, spin, orbital, and lattice degrees of freedom. In addition, they possess a large number of cations and growth parameters that can be used to manipulate their properties. The approach of this work utilizes laser-assisted growth to control interfacial properties with atomic layer precision in combination with state-of-the-art techniques for characterizing their structural, chemical, and functional properties over multiple length scales. In addition, geometric confinement effects as these materials are patterned down to nanoscale dimensions are being investigated. These results are enabling the development of predictive models of the emergent interfacial properties at dimensions relevant for device applications The participating graduate and undergraduate students are gaining hands-on training in disciplines that lie at the intersection between the traditional fields of Materials Science and Engineering, Physics, and Electrical Engineering through the introduction to state-of-the-art synthesis, sophisticated characterization techniques, and theoretical calculations.

非技术描述：该项目着重于开发新的人造分层材料，这些材料可以提高对原子水平上纳米科学的基本了解。这些材料在下一代设备（Spintronic和Orbitronic）中具有应用，这些设备被预测显示出比传统电子设备的设备速度和能源效率的显着提高。关键在于利用由钙钛矿氧化物的表面和界面在纳米尺度上发生的结构和化学变化所产生的意外物理现象。外展活动包括对UC Davis科学，技术，工程和数学转移日的支持，该活动针对的是在北加州北部的数学工程科学成就计划中受教育不利和代表性不足的群体的支持。层。钙钛矿氧化物是这些研究的理想候选材料，这是由于其广泛的功能性能是由电荷，自旋，轨道和晶格自由度之间强烈的耦合而产生的。此外，它们具有大量的阳离子和生长参数，可用于操纵其性质。这项工作的方法利用激光辅助生长来控制具有原子层精度的界面特性，并结合最新技术来表征其在多个长度尺度上的结构，化学和功能性能。另外，正在研究这些材料对纳米级尺寸的图案，几何限制效应正在研究。这些结果使得与设备应用相关的尺寸的新兴界面特性的预测模型的发展开发。参与的研究生和本科生正在获得在材料科学和工程，物理学，物理学和电气工程领域之间的交叉培训中进行的训练，这些培训是通过对特殊特征的概述，精致的特征，并进行了精致的特征，并进行了精致的特征。

项目成果

Modification of magnetocrystalline anisotropy via ion-implantation

• DOI: 10.1063/1.5134867
• 发表时间: 2020-04-01
• 期刊: AIP ADVANCES
• 影响因子: 1.6
• 作者: Lee, Michael S.;Chopdekar, Rajesh, V;Takamura, Yayoi
• 通讯作者: Takamura, Yayoi

Correlation between epitaxial strain and magnetic properties in La 0.7 Sr 0.3 CoO 3 /La 0.7 Sr 0.3 MnO 3 bilayers

La 0.7 Sr 0.3 CoO 3 /La 0.7 Sr 0.3 MnO 3 双层外延应变与磁性能的相关性

• DOI: 10.1063/1.5054003
• 发表时间: 2019
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: Byers, J. Paige;Li, Binzhi;Chopdekar, Rajesh V.;Ditto, Jeffrey;Johnson, David C.;Takamura, Yayoi;Browning, Nigel D.
• 通讯作者: Browning, Nigel D.

Tailoring Spin Textures in Complex Oxide Micromagnets

• DOI: 10.1021/acsnano.6b03770
• 发表时间: 2016-09-01
• 期刊: ACS NANO
• 影响因子: 17.1
• 作者: Lee, Michael S.;Wynn, Thomas A.;Takamura, Yayoi
• 通讯作者: Takamura, Yayoi

Phase transitions and magnetic domain coexistence in Nd0.5Sr0.5MnO3 thin films

• DOI: 10.1016/j.jmmm.2019.166116
• 发表时间: 2020-03
• 期刊: Journal of Magnetism and Magnetic Materials
• 影响因子: 2.7
• 作者: I-Ting Chiu;Alexander M. Kane;R. Chopdekar;Peifen Lyu;Ankita Mehta;C. Rouleau;A. N’Diaye;E. Arenholz;Y. Takamura