Spin-Polarized Electron Spectroscopies of Magnetic Surfaces

磁性表面的自旋偏振电子能谱

• 批准号: 8821293
• 负责人: Herbert Hopster
• 金额: $ 32.78万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-03-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8821293&HistoricalAwards=false
• 关键词: Spin; Polarized; Electron; Spectroscopies; Magnetic

The electronic structure of magnetic surfaces will be studied by spin-polarized electron energy loss spectroscopy, combining a polarized source with polarization analysis of the scattered electrons. Specifically, they will study the temperature dependence of the Stoner excitation spectrum in nickel, measure the exchange splitting of the chromium(100) surface and explore the potential of spin-polarized Electron Energy Loss Spectroscopy in probing the electronic structure of antiferromagnetically ordered materials, using thin nickel oxide layers. Nickel oxide is the model antiferromagnetic Mott insulator. In addition, they will study the magnetization profile and its temperature dependence of clean and adsorbate covered surfaces by angle dependent spin polarized secondary electron spectroscopy.

磁性表面的电子结构将通过 自旋极化电子能量损失谱，结合 偏振源与散射的偏振分析 电子。 具体来说，他们将研究 镍中斯通纳激发光谱的相关性，测量 Cr（100）表面的交换劈裂及探索 自旋极化电子能量损失谱势 在探测反铁磁性物质的电子结构时， 有序的材料，使用薄的氧化镍层。 氧化镍 是典型的反铁磁莫特绝缘体。 此外他们 将研究其磁化曲线和温度 清洁和吸附物覆盖表面与角度的关系 依赖自旋极化二次电子能谱