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Impact of Nanoscale Structure on Properties of Multiferroic Complex Oxides

纳米结构对多铁复合氧化物性能的影响

基本信息

批准号：
1809931
负责人：
Trevor Tyson
金额：
$ 49.25万
依托单位：
New Jersey Institute of Technology
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-08-01 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1809931&HistoricalAwards=false
关键词：
Impact Nanoscale Structure Properties Multiferroic

项目摘要

Non-Technical AbstractSociety is entering the era of "big data" where new materials are needed to enable high-density storage. Hexagonal rare earth oxides are examples of such materials which may revolutionize the storage industry. This research aims at enabling the use of these oxides in device applications. In particular, the researchers are determining the atomic structures of the oxides, essential to rational designs of new materials with atomic structures that can support useful functionalities. Graduate and undergraduate students are involved in all levels of this work including sample preparation, laboratory and synchrotron-based measurements, modeling, software development and data analysis. A seven-week summer research and teaching program on transition metal oxide preparation and characterization, designed for Newark area high school students is being continued and includes a one-week workshop for high school teachers to enable them to implement components of the program into their laboratory experiments. Overall integration of the broader impacts and assessment of the project is coordinated by the Collaborative for Leadership, Education, and Assessment Research at NJIT. The proposed research and education is a collaboration between the New Jersey Institute of Technology, Rutgers University, Brookhaven National Laboratory, Argonne National Laboratory, Oak Ridge National Laboratory and the SEED program for high school students (American Chemical Society). The project is training students in detailed sample preparation, analysis, and modeling. Technical AbstractMaterials that can significantly increase the density of random access memory have the potential to revolutionize the storage industry. Complex oxides of hexagonal RMnO3 (R=Rare earth, Y, Sc or In) are good candidates for such materials as they exhibit stable polarization vortex domains. The cubic (perovskite) phase of this system shows strong coupling of magnetization and electric polarization possibly enabling writing of polarization bits with magnetic fields. This research has two objectives aimed at potentially enabling use of these oxides in device applications. The aim of the first objective is to determine the atomic structure of RMnO3 oxides across vortex domains. It is hypothesized that nontrivial spatial variations in atomic structure in these materials are related to changes in polarization across vortex domains. Currently, the atomic structures within individual domains are unknown. In the second objective, we will study effects of pressure on the structure of perovskite RMnO3. These materials exhibit spin-driven electric polarization which may be enhanced by pressure. Graduate and undergraduate students are involved in all levels of this work including sample preparation, laboratory and synchrotron-based measurements, modeling, software development and data analysis. A seven-week summer research and teaching program on transition metal oxide preparation and characterization, designed for Newark area high school students, is being extended to include a one-week workshop for high school teachers to enable them to implement components of the program into their laboratory experiments. Overall integration of the broader impacts and assessment of the project is coordinated by the Collaborative for Leadership, Education, and Assessment Research (CLEAR) at NJIT. External assessment and follow-on studies will be conducted by the Center for Research and Evaluation on Education and Human Services (CREEHS) at Montclair State University. The research is a collaboration between the New Jersey Institute of Technology, Rutgers University, Brookhaven National Laboratory, Argonne National Laboratory, Oak Ridge National Laboratory and the SEED program for high school students (American Chemical Society).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.

社会正在进入"大数据"时代，需要新材料来实现高密度存储。卤化稀土氧化物是这种材料的例子，它可能会彻底改变存储行业。这项研究的目的是使这些氧化物在设备应用中的使用。特别是，研究人员正在确定氧化物的原子结构，这对于合理设计具有原子结构的新材料至关重要，这些结构可以支持有用的功能。研究生和本科生参与这项工作的各个层面，包括样品制备，实验室和基于同步加速器的测量，建模，软件开发和数据分析。为纽瓦克地区高中学生设计的为期七周的过渡金属氧化物制备和表征夏季研究和教学方案正在继续进行，其中包括为高中教师举办的为期一周的讲习班，使他们能够在实验室实验中实施该方案的组成部分。该项目的更广泛的影响和评估的整体整合由NJIT的领导力，教育和评估研究协作协调。拟议的研究和教育是新泽西理工学院、罗格斯大学、布鲁克海文国家实验室、阿贡国家实验室、橡树岭国家实验室和高中生种子计划（美国化学学会）之间的合作。该项目是训练学生在详细的样品制备，分析和建模。技术摘要能够显著提高随机存取存储器密度的材料有可能彻底改变存储行业。六方晶系RMnO_3（R =稀土、Y、Sc或In）的复合氧化物是这种材料的良好候选物，因为它们表现出稳定的极化涡旋畴。该系统的立方（钙钛矿）相显示出磁化和电极化的强耦合，可能使得能够利用磁场写入极化位。这项研究有两个目标，旨在潜在地使这些氧化物在设备应用中的使用。第一个目标的目的是确定RMnO3氧化物的原子结构跨涡旋域。据推测，在这些材料中的原子结构的非平凡的空间变化与跨涡旋域的偏振变化有关。目前，单个域中的原子结构是未知的。在第二个目标中，我们将研究压力对钙钛矿RMnO 3结构的影响。这些材料表现出可以通过压力增强的自旋驱动的电极化。研究生和本科生参与这项工作的各个层面，包括样品制备，实验室和基于同步加速器的测量，建模，软件开发和数据分析。为纽瓦克地区高中学生设计的为期七周的过渡金属氧化物制备和表征夏季研究和教学计划正在扩大，包括为高中教师举办为期一周的研讨会，使他们能够将该计划的组成部分纳入实验室实验。更广泛的影响和项目评估的整体整合由NJIT的领导力，教育和评估研究合作（CLEAR）协调。外部评估和后续研究将由蒙特克莱尔州立大学的教育和人类服务研究与评价中心（CREEHS）进行。这项研究是新泽西理工学院、罗格斯大学、布鲁克海文国家实验室、阿贡国家实验室、橡树岭国家实验室和面向高中生的SEED项目（美国化学学会）之间的合作。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。