FMR study of ultrathin Co magnetic films on vicinal Si(1 1 1) substrates

Detection of ferromagnetic resonance from 1 nm-thick Co

“…The thickness of the Co films in those previous studies is comparable to that in our present study. Meanwhile, the resonance field and the FMR linewidth in those studies were roughly 500 mT and 60 mT (note that the linewidth of 60 mT is equivalent to the half-width at half-maximum of roughly 70 mT) 16 , respectively (the similarly large resonance field was also reported in the literature 17 , whereas the linewidth was not discussed in the study). Such the large resonance field and the broad FMR linewidth are attributed to a fact that the ferromagnetism was quite weak and the magnetization precession under FMR was not uniform, i.e., the quality of the Co was poor.…”

“…In chronicle of FMR studies of thin ferromagnetic films, a couple of studies were implemented about detection of FMR spectra from ultrathin Co 16 , 17 almost 2 decades ago. The thickness of the Co films in those previous studies is comparable to that in our present study.…”

Surface morphology and magnetic anisotropy of obliquely deposited Co/Si(111) films

“…11 However, the UMA superimposed on the sixth-fold magnetic anisotropy and the origin of the UMA were less reported. 12,13 In this paper, we fabricated Co film on Si͑111͒ substrate by oblique incident deposition, investigated the magnetization reversal mechanism by using magneto-optical Kerr effect ͑MOKE͒ and built a total energy model to investigate the magnetic hysteresis curves near the hard axis. Moreover, we investigated the surface morphology induced magnetic shape anisotropy by calculating the height self-correlation function through the actual scanning tunneling microscope ͑STM͒ image.…”