SPP 1133: Ultrafast magnetization processes

SPP 1133：超快磁化过程

• 批准号: 5471552
• 金额: --
• 依托单位: Arbeitsgruppe Magnetismus
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5471552?language=en
• 关键词: SPP; 1133; Ultrafast; magnetization; processes

The aim of the priority programme is the achievement of a basic understanding of the temporal evolution of fast magnetisation processes in magnetically ordered films, multilayers and microstructured systems. The challenge lies in the advancement of the field of ultrafast magnetisation processes into the regime of a few femtoseconds to nanoseconds, a topic not yet well explored. A general aim is to understand the fundamental mechanisms needed for applications in ultrafast magneto electronic devices. The fundamental topic to be addressed is the response of the magnetisation of small structures upon the application of pulsed magnetic fields, laser pulses or injected spin polarised electron pulses on short time scales, ranging from a small disturbance of the system up to the reversal of the magnetisation direction. The priority programme brings together researchers with expertise in ultrafast processes on the time scale of femtoseconds, with experience in collective excitations on the picosecond time scale, and in experience in coherent remagnetisation and in macroscopic domain effects on the nanosecond time scale. Both theoretical and experimental work will be conducted in close collaboration. The potential for these experiments has evolved from the recent availability of new methods and techniques. Pump-probe experiments with femtosecond laser systems and the employment of ultrashort magnetic field pulses, generated by miniaturised coils and waveguides are made. The development of new techniques for high resolution microscopy with added temporal resolution by the employment of short laser pulses, and the development of novel detectors are strongly encouraged.

优先计划的目的是实现对磁有序薄膜，多层膜和微结构系统中快速磁化过程的时间演变的基本理解。挑战在于将超快磁化过程领域推进到几飞秒到纳秒的范围，这是一个尚未充分探索的主题。一般的目的是了解在超快磁电子器件的应用所需的基本机制。要解决的基本问题是响应的小结构的磁化后的应用程序的脉冲磁场，激光脉冲或注入自旋极化电子脉冲在短时间尺度上，范围从一个小的干扰系统的磁化方向的逆转。该优先计划汇集了具有飞秒时间尺度上超快过程专业知识的研究人员，具有皮秒时间尺度上集体激发的经验，以及在相干重磁化和纳秒时间尺度上宏观畴效应的经验。 理论和实验工作将密切合作进行。这些实验的潜力已经从最近可用的新方法和技术。用飞秒激光系统和超短磁场脉冲的就业，产生的螺旋线圈和波导的泵浦探测实验。大力鼓励发展新技术，通过采用短激光脉冲增加时间分辨率，并开发新的探测器。