2014/09/30 by Richard F. L. Evans, R. F. L. Evans, Unai Atxitia +3 · 1 citation
Materials Science · Physics and Astronomy · #Condensed matter physics #Ferromagnetism #Laser #Magnetic Properties and Applications #Magnetic Properties of Alloys #Magnetic field #Magnetic properties of thin films #Magnetization #Magnetization dynamics #Materials science #Optics #Physics #Picosecond #Quantum mechanics #Thermal #Thermodynamics #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.91.144425
published as Phys. Rev. B 91, 144425 (2015)
openalex publication_date 2015/04/30 · arxiv created 2015/05/10 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Atomistic spin model simulations are immensely useful in determining temperature-dependent magnetic properties but are known to give the incorrect dependence of the magnetization on temperature compared to experiment owing to their classical origin. We find a single-parameter rescaling of thermal fluctuations which gives quantitative agreement of the temperature-dependent magnetization between atomistic simulations and experiment for the elemental ferromagnets Ni, Fe, Co, and Gd. Simulating the subpicosecond magnetization dynamics of Ni under the action of a laser pulse, we also find quantitative agreement with experiment in the ultrafast regime. This enables the quantitative determination of temperature-dependent magnetic properties, allowing for accurate simulations of magnetic materials at all temperatures.