2017/06/02 by Thomas J. Meyer, Meyer, Thomas, T. Brächer +16
Engineering · Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena
paper · pdf · doi:10.48550/arxiv.1706.00619
openalex publication_date 2017/06/02 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28
We present the temperature dependence of the thermal magnon density in a thin\nferromagnetic layer. By employing Brillouin light scattering and varying the\ntemperature, an increase of the magnon density accompanied by a lowering of the\nspin-wave frequency is observed with increasing temperature. The magnon density\nfollows the temperature according to the Bose-Einstein distribution function\nwhich leads to an approximately linear dependency. In addition, the influence\nof this effect in spin-transfer-torque-driven systems is presented. In\nparticular, the increase in the magnon density with temperature sets the limit\nfor a suppression of magnons in charge current-driven systems. Hence, the\nmaximum possible suppression of thermal magnons occurs at a finite current.\n