论文信息 - Reversal mechanism of submicron patterned CoNi/Pt multilayers

Reversal mechanism of submicron patterned CoNi/Pt multilayers

With laser interference lithography Co/sub 50/Ni/sub 50//Pt multilayers with perpendicular magnetic anisotropy have been patterned into regular matrices of submicron sized dots. Their magnetic properties have been studied with Vibrating Sample Magnetometry. Compared to continuous multilayers (H/sub c/=15 kA/m) the coercivity for the patterned multilayers is much larger (H/sub c/=115-270 kA/m). Though the hysteresis curves of 180 nm dots and 60 nm dots have identical shapes, virgin curves seem to indicate that the 180 nm dots are multidomain while the 60 nm dots are single domain. The latter has been confirmed with Magnetic Force Microscopy observations.

Leon Abelmann | J. C. Lodder | J. R. Schuurhuis | M.A.M. Haast | Th.J.A. Popma

[1] P. J. Bedrossian,et al. Magnetic force microscopy of single-domain cobalt dots patterned using interference lithography , 1996 .

[2] Stephen Y. Chou,et al. Patterned magnetic nanostructures and quantized magnetic disks , 1997, Proc. IEEE.

[3] Heinz Schmid,et al. Hysteresis in lithographic arrays of permalloy particles: Experiment and theory (invited) , 1991 .

[4] R. Pease,et al. Submicron patterning of thin cobalt films for magnetic storage , 1994 .

[5] M. Welland,et al. Magnetic force microscopy of Co‐Pd multilayers with perpendicular anisotropy , 1994 .

[6] A. Hawryluk,et al. Fabrication of sub‐0.5 μm diameter cobalt dots on silicon substrates and photoresist pedestals on 50 cm×50 cm glass substrates using laser interference lithograph , 1996 .