RUI: Magnetic Studies of Carbon Encapsulated Nanoparticles

小行星9706870 本计画探讨碳包覆磁性粒子的磁性行为. 该研究涉及合成，纯化，磁性提取以及颗粒的结构和磁性表征。 磁性颗粒（铁-过渡金属、钴-过渡金属、镍-过渡金属和富铁稀土的碳涂层合金）在改进的低碳：金属比富勒烯电弧室中合成，其中碳化物的形成被最小化。 颗粒的表征包括粒度分布分析和组成，使用透射电子显微镜和X射线衍射的结构分析，以及穆斯堡尔谱。 磁滞和温度依赖的磁响应是在很宽的磁场和温度范围内测量的。 这是圣何塞州立大学（粒子表征）和西北大学（粒子合成）之间的合作项目。 %碳包封的磁性颗粒是令人感兴趣的，因为它们联合收割机了碳涂层的腐蚀保护和基于包封的金属合金类型的可能的独特磁性。 ***

9706870 Parvin This project explores the magnetic behavior of carbon- encapsulated magnetic particles. The research involves synthesis, purification, magnetic extraction, and structural and magnetic characterization of the particles. The magnetic particles (carbon-coated alloys of iron-transition metals, cobalt-transition metals, nickel-transition metals and iron-rich rare earths)are synthesized in a modified low carbon:metal ratio fullerene arc chamber in which the formation of carbides are minimized. Characterization of the particles includes particle size distribution analysis and composition, structural analysis using transmission electron microscopy and X-ray diffraction, and Mossbauer spectroscopy. Hysteritic and temperature-dependent magnetic response is measured over a wide range of magnetic fields and temperatures. It is a collaborative project between San Jose State University (particle characterization) and Northwestern University (particle synthesis). %%% Carbon-encapsulated magnetic particles are of interest because they combine corrosion protection from the carbon coating and possible unique magnetic properties based on the type of metal alloy encapsulated. ***