NER: Small Well-ordered Intermetallic Magnetic Nanoparticles

NER：小型有序金属间磁性纳米粒子

• 批准号: 0304005
• 负责人: Kevin Coffey
• 金额: $ 9.97万
• 依托单位: The University of Central Florida Board of Trustees
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0304005&HistoricalAwards=false
• 关键词: NER; Small; Well; ordered; Intermetallic

The authors proposed objective is to prepare small (less than 10 nm) nanoparticles of well-ordered (chemical order parameter, S, greater than 0.9) intermetallic magnetic materials to demonstrate that the extension of nanotechnology to these types of materials is possible and to generate further research interest in nanoparticles of intermetallic materials in general. The intellectual merit of this proposal would be a significant advancement of nanoscale science by the preparation of well-ordered, small nanoparticles of intermetallic phase materials, specifically both ferromagnetic and antiferromagnetic materials, which could be widely used as a basis for further research by others. The current authors expect that their nanoparticle processing approach will eliminate the known difficulties encountered by others. However, the exploratory nature of the proposed research is fully realized when it is considered that the desired ordering may simply not be thermodynamically favored for the smaller nanoparticles.The broader impacts of the proposed work are several. The potential of small, well-ordered L10 intermetallic (FePt or CoPt) nanoparticles to benefit the magnetic storage industry has already motivated a significant research field, in spite of the lack of success noted above. A feasibility demonstration of well-ordered small nanoparticles having nearly bulk phase magneto-crystalline anisotropy and the expected high ( 10 T) coercivity would provide a renewed impetus to the field and potentially contribute to the societal benefit of high-density magnetic data storage. Both graduate and undergraduate student participation at the primary academic research site, and more limited student participation at a storage industry research site are expected to have an educational benefit.

作者提出的目标是制备小（小于10 nm）纳米颗粒的有序（化学序参数，S，大于0.9）金属间磁性材料，以证明纳米技术扩展到这些类型的材料是可能的，并产生进一步的研究兴趣，一般的金属间材料的纳米颗粒。这一建议的智力价值将是纳米科学的重大进步，通过制备有序的金属间相材料的小纳米颗粒，特别是铁磁和反铁磁材料，可以广泛用作其他人进一步研究的基础。目前的作者希望他们的纳米颗粒处理方法将消除其他人遇到的已知困难。然而，当考虑到所需的有序性可能对较小的纳米粒子不具有物理上的有利性时，所提出的研究的探索性质就完全实现了。小的、有序的L10金属间化合物（FePt或CoPt）纳米颗粒有益于磁存储工业的潜力已经激发了一个重要的研究领域，尽管缺乏上述的成功。具有接近体相磁晶各向异性和预期的高（10 T）磁致伸缩性的有序小纳米颗粒的可行性证明将为该领域提供新的动力，并可能有助于高密度磁数据存储的社会效益。研究生和本科生在主要学术研究场所的参与，以及更有限的学生在存储行业研究场所的参与，预计将具有教育效益。