Generalized stacking fault in FePt nanoparticles and effects of extended defects on magnetocrystalline anisotropy energy

Ahmad Alsaad, Nabil Al-Aqtash, Renat F. Sabirianov

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We applied the concept of the generalized stacking faults energy to calculate the effect of the slip on the magnetocrystalline anisotropy of FePt nanostructures. We calculated γ-surface energy of L10FePt by shifting two crystallites against each other using slab approach for slips in (1 1 0) and (0 0 1) planes in regular lattice and in antiphase boundary (APB) along the path connecting the high symmetry points of γ-surface. We estimated the energy density of unstable point of γ-surface of regular slip and APB slip to be about 1.05 J/m2and 0.58 J/m2, respectively, while the brittle cleavage energy densities are of 1.74 J/m2and 1.1 J/m2, respectively. Local magnetic moments do not change significantly in the presence of the slip. We find that the slip in (1 1 0) and (0 0 1) planes affect strongly the magnetocrystalline anisotropy energy (MAE) increasing it for the slip in regular L10FePt, while decreasing it in case of slip in APB plane. We found MAE change associated with the slip at the unstable point of γ-surface is substantial with the energy densities of 0.663 J/m2and 1.74 J/m2for (1 1 0) and (0 0 1) planes, respectively. Thus, extended defects may affect the magnetization reversal of FePt nanoparticles.

Original languageEnglish (US)
Pages (from-to)525-529
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume374
DOIs
StatePublished - Jan 15 2015

Keywords

  • Anti-phase boundary
  • FePt nanoparticles
  • Generalized stacking faults
  • Magnetocrystalline anisotropy energy γ-surface energetics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Generalized stacking fault in FePt nanoparticles and effects of extended defects on magnetocrystalline anisotropy energy'. Together they form a unique fingerprint.

Cite this