Peculiar 'from-edge-to-interior' spin freezing in a magnetic dipolar cube

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

By molecular dynamics simulation, we have investigated classical Heisenberg spins, which are arrayed on a finite simple cubic lattice and interact with each other only by the dipole-dipole interaction, and have found its peculiar from-edge-to-interior freezing process. As the temperature is decreased, spins on each edge predominantly start to freeze in a ferromagnetic alignment parallel to the edge around the corresponding bulk transition temperature, then from each edge grow domains with short-ranged orders similar to the corresponding bulk orders, and finally the system is expected to end up with a unique multidomain ground state at the lowest temperature. We infer that these freezing characteristics are attributed to the anisotropic and long-range nature of the dipole-dipole interaction combined with a finite-size effect.

Original languageEnglish
Pages (from-to)2651-2654
Number of pages4
JournalJournal of the Physical Society of Japan
Volume74
Issue number10
DOIs
Publication statusPublished - 2005 Oct
Externally publishedYes

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Keywords

  • Magnetic dipolar system
  • Magnetic domain
  • Nanomagnetism
  • Spin dynamics simulation
  • Spin-freezing characteristics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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