The influence of magnetostatic interactions in exchange-coupled composite particles

Publication: Research - peer-reviewJournal article – Annual report year: 2010

  • Author: Vokoun, D.

    Academy of Sciences of the Czech Republic

  • Author: Beleggia, Marco

    Center for Electron Nanoscopy, Technical University of Denmark, Fysikvej, Denmark

  • Author: De Graef, M.

    Carnegie Mellon University, Department of Materials Science and Engineering

  • Author: Hou, H.C.

    National Tsing Hua University, Department of Materials Science and Engineering

  • Author: Lai, C.H.

    National Tsing Hua University, Department of Materials Science and Engineering

View graph of relations

Exchange-coupled composite (ECC) particles are the basic constituents of ECC magnetic recording media. We examine and compare two types of ECC particles: (i) core-shell structures, consisting of a hard-magnetic core and a coaxial soft-magnetic shell and (ii) conventional ECC particles, with a hard-magnetic core topped by a soft cylindrical element. The model we present describes the magnetic response of the two ECC particle types, taking into account all significant magnetic contributions to the energy landscape. Special emphasis is given to the magnetostatic (dipolar) interaction energy. We find that both the switching fields and the zero-field energy barrier depend strongly on the particle geometry. A comparison between the two types reveals that core-shell ECC particles are more effective in switching field reduction, while conventional ECC particles maintain a larger overall figure of merit.
Original languageEnglish
Article number275001
JournalJournal of Physics D: Applied Physics
Publication date2010
Volume43
Issue27
ISSN0022-3727
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 0
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

ID: 5148852