On the physics of magnetic anisotropy in Co/Pd multilayer thin films

Darren Smith, Shishan Zhang, Wolfgang Donner, E. Chunsheng, T. Randall Lee, Sahkrat Khizroev, Dmitri Litvinov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

(Co/Pd)N multilayers with Co and Pd layer thicknesses of only a few monolayers exhibit high vertical magnetic anisotropy and have been extensively explored as recording medium candidates for high density magnetic recording applications. In the work reported here, the magnetic properties of (Co/Pd) N multilayers deposited by magnetron sputtering and designed for bit-patterned medium applications are correlated with X-Ray Photoelectron Spectroscopy (XPS) data - an approach commonly used to probe the binding energies and valence band positions. Although the XPS probing depth is limited to ~2-3 nm, it is sufficient for the evaluation of the 1- 2 topmost bilayers in a multilayer stack, and allows us to infer the relevant details of the bandstructure of the entire film. Confirming theoretical predictions, we demonstrate that the degree of d-shell hybridization at Co/Pd interfaces directly correlates with the magnitude of the magnetic anisotropy. Significantly, the highest hybridization of Pd atoms is observed for about one monolayer thick Co layers in the bilayer stack. Variation of the deposition conditions (e.g., deposition pressure) shows a measurable influence on delectron hybridization, multilayer microstructure, and magnetic anisotropy.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings - Nanoscale Magnetics and Device Applications
PublisherMaterials Research Society
Pages64-69
Number of pages6
ISBN (Print)9781605604312
DOIs
StatePublished - 2007
Externally publishedYes
EventNanoscale Magnetics and Device Applications - 2007 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 9 2007Apr 13 2007

Publication series

NameMaterials Research Society Symposium Proceedings
Volume998
ISSN (Print)0272-9172

Conference

ConferenceNanoscale Magnetics and Device Applications - 2007 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA
Period4/9/074/13/07

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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