Size Distribution and Anisotropy Effects on the Switching Field Distribution of Co/Pd Multilayered Nanostructure Arrays Conference Paper uri icon


  • We use ion beam proximity lithography (IBPL) to produce 4 mm X 4 mm arrays of 220-nm dots in perpendicularly oriented Co/Pd multilayered media. A novel technique of overlapping neighbors is used with IBPL to generate samples with controllable size distribution n of the nanoarrays. The switching field distributionHcr /Hcr is measured for each sample before and after irradiation, and a linear relationship is experimentally found between Hcr /Hcr and D Empirical calculations support our determination that self- demagnetization fields are responsible for a portion of the switching field distribution. Using the zero intercept of the experimental data, we find the inherent anisotropy distribution in the Co/Pd samples is on the order of 10%. We further irradiate the samples with He+ ions to alter the anisotropy and better understand the role of shape anisotropy. As interface anisotropy is reduced in the Co/Pd bit-patterned medium (BPM) samples, shape anisotropy has a much greater contribution on the switching field distribution of the BPM samples. 2009 IEEE.

published proceedings


author list (cited authors)

  • Smith, D. T., Chang, L., Rantschler, J. O., Kalatsky, V., Ruchhoeft, P., Khizroev, S., & Litvinov, D.

citation count

  • 4

complete list of authors

  • Smith, Darren T||Chang, Long||Rantschler, James O||Kalatsky, Valery||Ruchhoeft, Paul||Khizroev, Sakhrat||Litvinov, Dmitri

publication date

  • October 2009