Spin correlations in Ho2Ti2O7: A dipolar spin ice system

S.T. Bramwell; M.J. Harris; B.C. den Hertog; M.J.P. Gingras; J.S. Gardner; D.F. McMorrow; A.R. Wildes; A.L. Cornelius; J.D.M. Champion; R.G. Melko; T. Fennell

doi:10.1103/PhysRevLett.87.047205

Spin correlations in Ho₂Ti₂O₇: A dipolar spin ice system

S.T. Bramwell, M.J. Harris, B.C. den Hertog, M.J.P. Gingras, J.S. Gardner, D.F. McMorrow, A.R. Wildes, A.L. Cornelius, J.D.M. Champion, R.G. Melko, T. Fennell

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The pyrochlore material Ho(2)Ti(2)O(7) has been suggested to show "spin ice" behavior. We present neutron scattering and specific heat results that establish unambiguously that Ho(2)Ti(2)O(7) 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 Ho(3+) salts. These results settle the question of the nature of the low temperature spin correlations in Ho(2)Ti(2)O(7) for which contradictory claims have been made.

Original language	English
Journal	Physical Review Letters
Volume	87
Issue number	4
Pages (from-to)	047205.1-047205.4
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.87.047205
Publication status	Published - 2001

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title = "Spin correlations in Ho2Ti2O7: A dipolar spin ice system",

abstract = "The pyrochlore material Ho(2)Ti(2)O(7) has been suggested to show {"}spin ice{"} behavior. We present neutron scattering and specific heat results that establish unambiguously that Ho(2)Ti(2)O(7) 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 Ho(3+) salts. These results settle the question of the nature of the low temperature spin correlations in Ho(2)Ti(2)O(7) for which contradictory claims have been made. ",

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doi = "10.1103/PhysRevLett.87.047205",

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TY - JOUR

T1 - Spin correlations in Ho2Ti2O7: A dipolar spin ice system

AU - Bramwell, S.T.

AU - Harris, M.J.

AU - Hertog, B.C. den

AU - Gingras, M.J.P.

AU - Gardner, J.S.

AU - McMorrow, D.F.

AU - Wildes, A.R.

AU - Cornelius, A.L.

AU - Champion, J.D.M.

AU - Melko, R.G.

AU - Fennell, T.

PY - 2001

Y1 - 2001

N2 - The pyrochlore material Ho(2)Ti(2)O(7) has been suggested to show "spin ice" behavior. We present neutron scattering and specific heat results that establish unambiguously that Ho(2)Ti(2)O(7) 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 Ho(3+) salts. These results settle the question of the nature of the low temperature spin correlations in Ho(2)Ti(2)O(7) for which contradictory claims have been made.

AB - The pyrochlore material Ho(2)Ti(2)O(7) has been suggested to show "spin ice" behavior. We present neutron scattering and specific heat results that establish unambiguously that Ho(2)Ti(2)O(7) 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 Ho(3+) salts. These results settle the question of the nature of the low temperature spin correlations in Ho(2)Ti(2)O(7) for which contradictory claims have been made.

KW - Industrielle materialer

U2 - 10.1103/PhysRevLett.87.047205

DO - 10.1103/PhysRevLett.87.047205

M3 - Journal article

SN - 0031-9007

VL - 87

SP - 047205.1-047205.4

JO - Physical Review Letters

JF - Physical Review Letters

IS - 4