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Title: Self-assembled magnetic nanospheres with three-dimensional magnetic vortex

We report the electron holography images of spin configurations in peculiar assemblies of soft magnetic nanoparticles in single-, double-, triple-, or quadruple-sphere geometrical arrangements, in which each particle has a three-dimensional (3D) magnetic-vortex structure. Micromagnetic numerical calculations reveal that the uniqueness of the nanoparticles' 3D vortex structure plays a crucial role in their assembly, especially in terms of the contrasting contributions of the exchange and dipolar interactions to their binding energies. The results represent physical insights into the assembly of 3D-vortex-structure magnetic nanoparticles in different geometrical configurations and offer a practical means of controlling those assemblies.
Authors:
; ; ; ; ; ;  [1] ; ; ; ;  [2] ;  [3] ;  [4] ;  [4] ;  [5] ;  [4] ;  [5]
  1. National Creative Research Initiative Center for Spin Dynamics and Spin-Wave Devices, Nanospinics Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of)
  2. Department of Materials Science and Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of)
  3. Department of Materials Science and Engineering, Dong-A University, Busan 604-714 (Korea, Republic of)
  4. Center for Emergent Matter Science (CEMS), RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198 (Japan)
  5. (Japan)
Publication Date:
OSTI Identifier:
22395477
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BINDING ENERGY; ELECTRONS; HOLOGRAPHY; IMAGES; MAGNETIC MATERIALS; NANOPARTICLES; SPHERES; SPIN; THREE-DIMENSIONAL LATTICES; VORTICES