Ultrafast generation and manipulation of ferromagnetic order

铁磁有序的超快生成和操纵

• 批准号: 27174166
• 负责人: Professor Dr. Christian Back
• 金额: --
• 依托单位: Department of Physics and Astronomy
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/27174166?language=en
• 关键词: Ultrafast; generation; manipulation; ferromagnetic; order

Within this project we will study alternative methods of generating ultra short magnetic field pulses. The approaches are based on laser pulse excitation of ferromagnetic or antiferromagnetic materials. In the case of FeRh the ultra short laser pulse is used to generate ferromagnetic order by rapidly heating the material across the antiferromagnet/ferromagnet transition temperature. In the case of EuO we will use circularly polarized light with energy below the band gap of the ferromagnetic semiconductor to generate an effective internal field. In both cases we intend to study the effect of ultra fast field generation and control on a thin ferromagnetic layer deposited on top of the ¿driving¿ material.

在这个项目中，我们将研究产生超短磁场脉冲的替代方法。这些方法是基于铁磁或反铁磁材料的激光脉冲激发。在FeRh的情况下，超短激光脉冲用于通过快速加热材料跨越反铁磁体/铁磁体转变温度来产生铁磁有序。在EuO的情况下，我们将使用能量低于铁磁半导体带隙的圆偏振光来产生有效的内部场。在这两种情况下，我们打算研究超快场的产生和控制的效果上的一个薄铁磁层沉积在顶部的驱动材料。