Finite size effects in shell nanoparticles

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The finite size effects on magnetic properties of shell particles in the shape of truncated octahedron are studied using classical O(3) Heisenberg model. Both considered cases with nearest neighbor ferromagnetic (FM) and antiferromagnetic (AFM) exchange interactions show the existence of the well-defined ground state. The FM particles show FM order, while AFM particles show freezing in the non-collinear structure with very low magnetization due to the presence of frustrated triangular facets. The variation of magnetization, susceptibility and specific heat as a function of size shows considerable differences from that in the three-dimensional (3D) particles. We also observe effects of shell geometry, i.e. the fraction of sites in facets, edges and vertexes, which affects the apparent ordering temperature.

Original languageEnglish (US)
Pages (from-to)1137-1141
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume321
Issue number9
DOIs
StatePublished - May 1 2009

Fingerprint

Magnetization
Nanoparticles
nanoparticles
Exchange interactions
Freezing
Ground state
Specific heat
flat surfaces
Magnetic properties
heat
magnetization
Geometry
freezing
apexes
specific heat
magnetic properties
magnetic permeability
Temperature
ground state
geometry

Keywords

  • Exchange coupling
  • Magnetic order
  • Shell nanoparticle
  • Surface

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Finite size effects in shell nanoparticles. / Koch, J.; Sabirianov, Renat F.

In: Journal of Magnetism and Magnetic Materials, Vol. 321, No. 9, 01.05.2009, p. 1137-1141.

Research output: Contribution to journalArticle

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