Slow relaxation of spin structure in exotic ferromagnetic phase of Ising-like Heisenberg Kagomé Antiferromagnets

Shu Tanaka, Seiji Miyashita

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In the corner-sharing lattice, magnetic frustration causes macroscopic degeneracy in the ground state, which prevents systems from ordering. However, if the ensemble of the degenerate configuration has some global structure, the system can have a symmetry breaking phenomenon and thus posses a finite temperature phase transition. As a typical example of such cases, the magnetic phase transition of the Ising-like Heisenberg antiferromagnetic model on the kagomé lattice has been studied. There, a phase transition of the two-dimensional ferromagnetic Ising universality class occurs accompanying with the uniform spontaneous magnetization. Because of the macroscopic degeneracy in the ordered phase, the system is found to show an entropy-driven ordering process, which is quantitatively characterized by the number of "weathervane loop" (WL). We investigate this novel type of slow relaxation in regularly frustrated system.

Original languageEnglish
Article number103001
JournalJournal of the Physical Society of Japan
Volume76
Issue number10
DOIs
Publication statusPublished - 2007 Oct 1
Externally publishedYes

Keywords

  • Antiferromagnetic Kagomé system
  • Classical Heisenberg spin system
  • Entropy effect
  • Phase transition
  • Slow relaxation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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