Spin correlations in Ho2Ti2O7:: A dipolar spin ice system -: art. no. 047205

被引：273

作者：

Bramwell, ST

Harris, MJ

den Hertog, BC

Gingras, MJP

Gardner, JS

McMorrow, DF

Wildes, AR

Cornelius, AL

Champion, JDM

Melko, RG

Fennell, T

机构：

[1] UCL, Dept Chem, London WC1H OAJ, England

[2] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

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

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

[5] CNR, NPMR, Chalk River Labs, Chalk River, ON K0J 1J0, Canada

[6] Riso Natl Lab, Condensed Matter Phys & Chem Dept, DK-4000 Roskilde, Denmark

[7] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[8] Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.87.047205

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The pyrochlore material Ho2Ti2O7 has been suggested to show "spin ice" behavior. We present neutron scattering and specific heat results that establish unambiguously that Ho2Ti2O7 exhibits spin ice correlations at low temperature. Diffuse magnetic neutron scattering is quite well described by a nearest neighbor spin ice model and very accurately described by a dipolar spin ice model. The heat capacity is well accounted for by the sum of a dipolar spin ice contribution and an expected nuclear spin contribution, known to exist in other Ho3+ salts. These results settle the question of the nature of the low temperature spin correlations in Ho2Ti2O7 for which contradictory claims have been made.

引用

页码：47205 / 1

页数：4

共 28 条

[11]

Harris MJ, 1998, J MAGN MAGN MATER, V177, P757, DOI 10.1016/S0304-8853(97)00796-8

[12] Geometrical frustration in the ferromagnetic pyrochlore Ho2Ti2O7 [J].