Magnetic Transition Metal Nanowires

0906957 Fullerton该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。非技术描述：纳米磁学是科学中最活跃的领域之一，具有广泛的基础科学问题以及新兴技术。 许多磁性器件仍处于起步阶段，深入了解底层材料和电子特性及其对器件性能的影响对于未来的技术至关重要。 该提案探讨了新型磁性纳米线的重要潜在结构，磁性和传输特性。 这项研究将解决纳米尺度的纳米线合成和磁性的基本问题，并在纳米科学的重要领域培养本科生和研究生技术专长：该提案探讨了过渡金属氧化物和核壳金属/氧化物纳米线（NW）的基本结构，磁性和传输特性。 纳米线将通过化学气相沉积（CVD）生长，从而产生各种相和核-壳结构的单晶纳米线。 该研究将首先集中于理解过渡金属及其氧化物的纳米线的生长和结构特性，以及各种核壳结构的形成。 这将包括一个调查的CVD NW生长的磁性过渡金属（铬，锰，铁，钴和镍）及其氧化物，特别侧重于理解和控制相的形成，成核和形态。 该研究将包括使用先进的电子和X射线表征技术对纳米线进行全面的结构和磁性表征。 该提案的后半部分将侧重于将这些纳米线集成到自旋输运器件中，以阐明纳米级复合材料的磁性，并确定其在新型器件应用中的潜力。 这项研究将解决一类新的金属氧化物复合纳米线的基本问题，确定其对未来技术的影响，并培养本科生和研究生的材料合成，利用国家用户设施进行材料表征，以及新材料在纳米技术中的应用。

0906957FullertonThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).NON-TECHNICAL DESCRIPTION: Nanomagnetism is one of the most active areas in science with a wide range of fundamental scientific problems as well as emerging technologies. Many magnetic devices are still in their infancy and a thorough understanding of the underlying materials and electronic properties and their effect on device performance will be essential for future technologies. The proposal explores important underlying structural, magnetic, and transport properties of new class of magnetic nanowires. This research will address fundamental issues of nanowire synthesis and magnetism at the nanoscale and train undergraduate and graduate students in important areas of nanoscienceTECHNICAL DETAILS: The proposal explores underlying structural, magnetic, and transport properties of transition-metal oxide and core-shell metal/oxide nanowires (NWs). The NWs will be grown by chemical vapor deposition (CVD) resulting in single-crystal NWs of various phases and core-shell structures. The research will initially focus on understanding the growth and structural properties of NWs of transition metals and their oxides, and the formation of various core-shell structures. This will include a survey the CVD NW growth of the magnetic transition metals (Cr, Mn, Fe, Co and Ni) and their oxides with particular focus on understanding and controlling the phase formation, nucleation, and morphology. The research will include full structural and magnetic characterization of the NWs using advance electron and x-ray characterization techniques. The latter part of the proposal will focus on integrating these NWs into spin-transport devices to elucidate magnetic properties of composite materials at the nanoscale and to determine their potential for novel device applications. This research will address fundamental issues of a new class of metal-oxide composite NWs, determine their impact on future technologies, and train undergraduate and graduate students in materials synthesis, exploiting national user facilities for materials characterization, and the application of new materials to nanotechnology.