2009/06/03 by H. T. Nembach, Hans T. Nembach, Hans G. Bauer +6 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Amplitude #Anisotropy #Characterization and Applications of Magnetic Nanoparticles #Coercivity #Condensed matter physics #Ferromagnetic resonance #Ferromagnetism #Field (mathematics) #Hysteresis #Kerr effect #Magnetic Properties and Applications #Magnetic anisotropy #Magnetic field #Magnetic hysteresis #Magnetic properties of thin films #Magnetization #Materials science #Microwave #Nanomagnet #Optics #Physics #Single domain #cond-mat.mtrl-sci #cond-mat.other
paper · pdf · doi:10.1063/1.3196556
arxiv created 2009/06/03 · openalex publication_date 2009/08/10 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We studied the microwave assisted magnetic reversal of 65×71 nm2 elliptical Ni80Fe20 nanomagnets. Hysteresis curves were measured by magneto-optical Kerr effect for a range of microwave frequencies and amplitudes. The coercive field Hc was reduced by 26% for an rf field of 0.08Hc when the microwave frequency coincided with the minimum of the experimentally determined ferromagnetic resonance frequency with varying dc field. The experimental results for the fractional reduction in Hc with rf field amplitude are in good agreement with numerical simulations for an array of interacting macrospins with a physically realistic shape anisotropy distribution.