Multiscale modeling of ultrafast spin dynamics (A08)

超快自旋动力学的多尺度建模 (A08)

• 批准号: 397772068
• 金额: --
• 依托单位: Quanten-Vielteilchentheorie, Quanteninformationstheorie und Quantenoptik
• 依托单位国家: 德国
• 项目类别: CRC/Transregios
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/397772068?language=en
• 关键词: Multiscale; modeling; ultrafast; spin; dynamics

We develop a multiscale model for ultrafast spin dynamics. We use atomistic spin dynamics methods parameterized from first principles calculations to model sub-picosecond spin dynamics of transition metals, rare-earths, and their bilayers after excitation with femtosecond laser pulses. Spin dynamics induced by THz radiation in the magnetic insulator yttrium iron garnet, and spin dynamics excited by ultrafast spin currents will be investigated. Our modeling complements experimental work to further understand and to control ultrafast spin dynamics and switching. The picosecond dynamics of magnetic domains is investigated by micromagnetic models, using the results of the atomistic spin dynamics model as input parameters.

我们发展了一个超快自旋动力学的多尺度模型。我们用原子自旋动力学方法模拟了飞秒激光激发后过渡金属、稀土及其双层膜的亚皮秒自旋动力学。我们将研究磁性绝缘体钇铁石榴石中太赫兹辐射引起的自旋动力学和超快自旋电流激发下的自旋动力学。我们的模型是对进一步理解和控制超快自旋动力学和开关的实验工作的补充。以原子自旋动力学模型的结果为输入参数，用微磁模型研究了磁畴的皮秒动力学。