Magnetic properties of one-dimensional quasiperiodic Co/Pt multilayers

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American Institute of Physics
We have fabricated Fibonacci [Co/Pt] multilayers with two constituent Co/Pt bilayers, as well as periodic multilayers of the same Co/Pt bilayers, all of which exhibit perpendicular magnetic anisotropy. Magnetic properties of the quasiperiodic and periodic [Co/Pt] multilayers have been studied macroscopically by vibrating sample magnetometry and microscopically by magnetic force microscopy. The Fibonacci [Co/Pt] multilayers show enhanced squareness in magnetic hysteresis loops compared to the corresponding periodic [Co/Pt]n multilayers, due to a smaller density of isolated nucleation sites in the saturation state.
magnetic hysteresis, cobalt, ferromagnetic materials, platinum, one-dimensional quasiperiodic multilayers, Fibonacci, perpendicular magnetic anisotropy, vibrating-sample magnetometry;, magnetic force microscopy, magnetic hysteresis loops, isolated nucleation sites;, Co-Pt
Journal of Applied Physics 15 April 2006, vol.99, no.8, pp. 8C902-1-3