Magnetism, Superconductivity and Anisotropy in Unusual Materials and Structures

这个实验研究项目致力于探索各向异性磁性和超导中的不寻常现象。重点讨论了材料结构与电子性质之间的关系。这项工作是以材料为基础的，包括新材料的合成，单晶和外延薄膜的生长，以及微结构的操纵。将采用的实验范围广泛，包括SQUID磁测量；使用高Q振荡器进行磁性、弹性和耗散测量；表面分析、核磁共振和热容。具体主题将包括无限层铜酸盐的磁激发和各向异性；两种Ce基化合物中近藤/重费米子行为和3D过渡金属磁性之间的竞争；以及表面结构对超薄铁磁薄膜自旋激发的影响，包括设计特定的磁振子弥散特征。在这项工作中，将广泛的合成、表征和分析技术统一在一个项目中，将为研究生提供材料科学和物理领域的良好培训。这个实验研究项目的中心是发现材料的结构与那些可能在技术上特别有用的电子性质之间的关系，包括磁性和超导电性。这项工作包括以单晶和外延薄膜的形式合成新材料，并将探索微结构操纵的效果。方法将包括使用敏感的磁性测量、表面分析和核磁共振。这项研究的结果可能包括不同寻常的新效应或结构，可能会在技术上得到应用。这项研究项目本质上是跨学科的，涉及本科生和研究生，他们将接受良好的培训，进入工业、政府或教育领域的职位。***

w:\awards\awards96\num.doc 9705414 Markert This experimental research project is devoted to exploring unusual phenomena in anisotropic magnetism and superconductivity. Emphasis is placed on the relation between materials structure and electronic properties. The work is materials-based and involves synthesis of new materials, growth of single crystals and of epitaxial films, and microstructure manipulation. A wide range of experiments to be employed includes SQUID magnetometry; magnetic, elastic and dissipative measurements using high-Q oscillators; surface analysis, NMR, and heat capacity. Specific topics will include magnetic excitations and anisotropy of infinite layer cuprates; competition between Kondo/heavy fermion behavior and 3d transition metal magnetism in two Ce-based compounds; and effects of surface structure on spin excitations in ultrathin ferromagnetic films, including the engineering of specific magnon dispesion features. In this work, the unity in one project of a wide array of synthesis, charcterization and analytical techniques will provide the graduate students with an excellent training in areas of materials science and physics. %%% This experimental research project is centered on discovering the relations between structure of materials and those electronic properties which may be particularly useful in technology, including magnetic properties and superconductivity. The work includes synthesis of novel materials in the form of single crystals, epitaxial films and will also explore effects of microstructure manipulation. Methods will include use of sensitive magnetic property measurements, surface analysis, and nuclear magnetic resonance. Results from this research may include unusual new effects or structures which may find application in technology. This research project is interdisciplinary in nature and involves undergraduate and graduate students who will be excellently trained to enter positions in industry, government or education. ***