2007/04/30 by G Boero, G. Boero, S. Mouaziz +11 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Magnetic Properties and Applications #Magnetic properties of thin films #Magneto-Optical Properties and Applications #cond-mat.mtrl-sci
paper · pdf · doi:10.1088/1367-2630/10/1/013011
published as New J. Phys. 10, 013011 (2008) · 16 pages, 8 figures
openalex publication_date 2008/01/17 · arxiv created 2008/01/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We report on the measurement of element-specific magnetic resonance spectra at gigahertz frequencies using x-ray magnetic circular dichroism (XMCD). We investigate the ferrimagnetic precession of Gd and Fe ions in Gd-substituted yttrium iron garnet, showing that the resonant field and linewidth of Gd precisely coincide with Fe up to the nonlinear regime of parametric excitations. The opposite sign of the Gd x-ray magnetic resonance signal with respect to Fe is consistent with dynamic antiferromagnetic alignment of the two ionic species. Further, we investigate a bilayer metal film, Ni 80 Fe 20 (5 nm)/Ni(50 nm), where the coupled resonance modes of Ni and Ni 80 Fe 20 are separately resolved, revealing shifts in the resonance fields of individual layers but no mutual driving effects. Energy-dependent dynamic XMCD measurements are introduced, combining x-ray absorption and magnetic resonance spectroscopies.