Anisotropy of W in Fe and Co

A. Kashyap, P. Manchanda, P. K. Sahota, Ralph Skomski, Jeff E. Shield, D. J. Sellmyer

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The magnetization and magnetic anisotropy of iron-rich Fe-W and W-Co intermetallics and nanostructures are investigated by first-principle calculations. The W atom is antiferromagnetically coupled to nearest neighbor Co atom and interface Fe atom in the case of Fe-W multilayers. The first anisotropy constants are positive, nearly zero, or negative, depending on the atomic structures. Typical anisotropy energies per atom are -0.513 meV for a dilute W-Co alloy, -0.06 meV for W2Fe2, and 0.44 meV for W2Fe4 (0.1 meV/atom∼1 MJ/m3). These values are of interest for permanent-magnet applications but also indicate the need for careful structural control and for a more detailed investigation of structure-property relationships in Fe-W nanostructures.

Original languageEnglish (US)
Article number6027698
Pages (from-to)3336-3339
Number of pages4
JournalIEEE Transactions on Magnetics
Volume47
Issue number10
DOIs
StatePublished - Oct 2011

Keywords

  • Anisotropy
  • transition-metal alloys

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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