Surface Magnetism of Novel Epitaxial Magnetic Systems

他们计划的目的是精心准备， 并研究新型磁性材料和外延，超 薄（1-20个原子层）膜，其预期表现出 不寻常的磁性，如超铁磁性， 居里温度和改变的临界指数， 具有显著的体积行为。 他们将利用电子俘获 光谱（ECS），它已发展成为一个非常敏感的 自旋敏感的方法，探测远程和短程 表面最上层的磁序。 进一步 磁研究将使用磁光克尔 极化二次电子的离子诱导发射。 后者是一种新的，非常表面敏感的技术， 正在他们的实验室里设计。 他们还计划推进他们的 磁显微镜的原子分辨率。 的材料 研究将包括人工磁系统组成， 元素如铁、铬、锰、钯和 铽，表现出不寻常的电和磁性能， 沉积在适当的衬底上。 他们的节目包括旋转 玻璃、Heusler合金和稀土/过渡金属 异质结构

The aim of their program is to carefully prepare, characterize and investigate novel magnetic materials and epitaxial, ultra- thin (1-20 atomic layers) films which are expected to exhibit unusual magnetic properties such as super-ferromagnetism, altered Curie temperatures and altered critical exponents that contrast strikingly with bulk behavior. They will use electron capture spectroscopy (ECS), which has developed into a very sensitive spin-sensitive method, to probe the long-ranged and short-ranged magnetic order at the topmost layer of a surface. Further magnetic studies will be performed using the magneto-optic Kerr effect and ion-induced emission of polarized secondary electrons. The latter is a new, very surface sensitive technique that is being designed in their lab. They also plan to advance their magnetic microscope towards atomic resolution. The materials studied will include artificial magnetic systems composed of elements such as iron, chromium, manganese, palladium and terbium that exhibit unusual electric and magnetic properties if deposited on adequate substrates. Their program includes spin glasses, Heusler alloys and rare-earth/transition metal heterostructures.