Study of Co/Pd multilayers as a candidate material for next generation magnetic media

Bing Hu, Nissim Amos, Yuan Tian, John Butler, Dmitri Litvinov, Sakhrat Khizroev

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We report a combinatorial synthesis study on the magnetic properties of sputter-deposited Co/Pd multilayers with high perpendicular anisotropy and high remnant squareness for magnetic media applications such as magnetic logic systems, bit patterned media, magneto-optical recording, and multilevel three-dimensional (3D) magnetic media. The perpendicular magnetic anisotropy in the multilayers originates from the interfacial anisotropy of the alloylike structure. The deposition conditions and subsequent microstructures of the multilayers are critical factors to determine the magnetic properties of the media. We investigated the dependence of the magnetic properties on the thickness of Co and Pd layers the number of Co/Pd bilayers. For instance, we found that a 0.26-nm-thick layer of Co would produce the highest coercivity value if paired with a 0.55-nm-thick Pd layer. Our results revealed that an Ar+milling could significantly increase the coercivity of the multilayer media. Further, we discovered that we could control the deposition pressure to achieve either granular or continuous media morphologies corresponding to exchange-coupled or decoupled grains, respectively. Finally, we used the combinatorial synthesis to tailor multilayers' properties to engineer a eight-level three-layer 3D media.

Original languageEnglish (US)
Article number034314
JournalJournal of Applied Physics
Volume109
Issue number3
DOIs
StatePublished - Feb 1 2011
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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