Spin melting and refreezing driven by uniaxial compression on a dipolar hexagonal plate

K. Matsushita, R. Sugano, A. Kuroda, Y. Tomita, H. Takayama

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Abstract

We investigate the freezing characteristics of a finite dipolar hexagonal plate by Monte Carlo simulation. The hexagonal plate is cut out from a piled triangular lattice of three layers with FCC-like (ABCABC) stacking structure. In the present study an annealing simulation is performed for a dipolar plate uniaxially compressed in the direction of layer-piling. We find spin melting and refreezing driven by the uniaxial compression. Each of the melting and refreezing corresponds one-to-one with a change of the ground states induced by compression. The freezing temperatures of the ground-state orders differ significantly from each other, which gives rise to the spin melting and refreezing of the present interest. We argue that these phenomena are originated by a finite size effect combined with a peculiar anisotropic nature of the dipole-dipole interaction.

Original languageEnglish
Article number145206
JournalJournal of Physics Condensed Matter
Volume19
Issue number14
DOIs
Publication statusPublished - 2007 Apr 11

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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