Monte Carlo simulations of a kagome lattice with magnetic dipolar interactions

被引：17
|
作者：
Holden, M. S. [1 ]
Plumer, M. L. [1 ]
Saika-Voivod, I. [1 ]
Southern, B. W. [2 ]
机构：
[1] Mem Univ Newfoundland, Dept Phys & Phys Oceanog, St John, NF A1B 3X7, Canada
[2] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada
来源：
PHYSICAL REVIEW B | 2015年 / 91卷 / 22期
基金：
加拿大自然科学与工程研究理事会;
关键词：
D O I：
10.1103/PhysRevB.91.224425
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The results of extensive Monte Carlo simulations of classical spins on the two-dimensional kagome lattice with only dipolar interactions are presented. In addition to revealing the sixfold-degenerate ground state, the nature of the finite-temperature phase transition to long-range magnetic order is discussed. Low-temperature states consisting of mixtures of degenerate ground-state configurations separated by domain walls can be explained as a result of competing exchange-like and shape-anisotropy-like terms in the dipolar coupling. Fluctuations between pairs of degenerate spin configurations are found to persist well into the ordered state as the temperature is lowered until locking in to a low-energy state.
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页数：8
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