Finite dipolar hexagonal columns on piled layers of triangular lattice

Katsuyoshi Matsushita, Ryoko Sugano, Akiyoshi Kuroda, Yusuke Tomita, Hajime Takayama

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We have investigated, by the Monte Carlo simulation, spin systems which represent moments of arrayed magnetic nanoparticles interacting with each other only by the dipole-dipole interaction. In the present paper we aim the understanding of finite size effects on the magnetic nanoparticles arrayed in hexagonal columns cut out from the close-packing structures or from those with uniaxial compression. In columns with the genuine close-packing structures, we observe a single vortex state which is also observed previously in finite two-dimensional systems. On the other hand in the system with the inter-layer distance set 1 / sqrt(2) times of the close-packing one, we found ground states which depend on the number of layers. The dependence is induced by a finite size effect and is related to a orientation transition in the corresponding bulk system.

本文言語English
ページ(範囲)1416-1418
ページ数3
ジャーナルJournal of Magnetism and Magnetic Materials
310
2 SUPPL. PART 2
DOI
出版ステータスPublished - 2007 3
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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