Dipolar interactions and origin of spin ice in Ising pyrochlore magnets

被引：423

作者：

den Hertog, BC ^{[1
]}

Gingras, MJP

机构：

[1] Univ Waterloo, Dept Phys, Waterloo, ON N2L 3G1, Canada

[2] Canadian Inst Adv Res, Toronto, ON M5G 1Z8, Canada

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.84.3430

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent experiments suggest that the Ising pyrochlore magnets Ho2Ti2O7 and Dy2Ti2O7 display qualitative properties of the nearest-neighbor "spin ice" model. We discuss the dipolar energy scale present in both these materials and discuss how spin-ice behavior can occur despite the presence of long-range dipolar interactions. We present results of numerical simulations and a mean field analysis of Ising pyrochlore systems. Eased on our quantitative theory, we suggest that the spin-ice behavior in these systems is due to long-range dipolar interactions, and chat the nearest-neighbor exchange in Dy2Ti2O7 is antiferromagnetic.

引用

页码：3430 / 3433

页数：4

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