NER: Small Well-ordered Intermetallic Magnetic Nanoparticles

作者提出的目标是制备小的（小于10纳米）有序金属间磁性材料的纳米颗粒（化学有序参数S大于0.9），以证明纳米技术在这些类型的材料中的扩展是可能的，并产生对金属间磁性材料纳米颗粒的进一步研究兴趣。这一建议的智力价值将是通过制备有序的金属间相材料，特别是铁磁性和反铁磁性材料的小纳米颗粒，在纳米尺度科学方面取得重大进展，这可以广泛地用作其他人进一步研究的基础。目前的作者期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，当考虑到所需的顺序可能根本不适合较小的纳米颗粒时，所提出的研究的探索性就完全实现了。拟议工作的更广泛影响有几个。小型有序L10金属间化合物（FePt或CoPt）纳米颗粒有利于磁存储行业的潜力已经激发了一个重要的研究领域，尽管上面提到的缺乏成功。有序的小纳米颗粒具有接近体相磁晶各向异性和预期的高矫顽力（10 T）的可行性论证将为该领域提供新的推动力，并可能为高密度磁数据存储的社会效益做出贡献。研究生和本科生在主要学术研究站点的参与，以及更有限的学生在存储行业研究站点的参与，都有望产生教育效益。

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.