拓扑无序磁体的老化与记忆特性
无序系统与神经网络
2009-11-07 v1
摘要
H3O)Fe3(SO4)2(OH)6的二维 kagome 系统和Y2Mo2O7的三维 pyrochlore 系统是两个已充分表征的低无序扰动亚磁性体系,它们不像自旋液体那样趋于凝聚,而是发生冻结转变,表现出自旋玻璃样特性。我们进一步深入比较了这些性质与自旋玻璃的特性,通过研究非平稳介导率中的显著复苏和记忆效应。虽然pyrochlore系统清晰地显示出这些非平凡效应,暗示具有温度选择性老化,即 characteristic of a wide hierarchical distribution of equilibration processes,但kagome系统没有明显显示这些效应。相反,它似乎会独立于温度地演化到相同的最终状态。
引用
@article{arxiv.cond-mat/0109242,
title = {Aging and memory properties of topologically frustrated magnets},
author = {V. Dupuis and E. Vincent and J. Hammann and J. E. Greedan and A. S. Wills},
journal= {arXiv preprint arXiv:cond-mat/0109242},
year = {2009}
}
备注
submitted for the proceedings of the 46th MMM conference (Seattle, 2001)