Spin dynamics in Ho2Ru2O7

J. S. Gardner; A. L. Cornelius; L. J. Chang; M. Prager; Th Brückel; G. Ehlers

doi:10.1088/0953-8984/17/44/002

Spin dynamics in Ho₂Ru₂O₇

J. S. Gardner, A. L. Cornelius, L. J. Chang, M. Prager, Th Brückel, G. Ehlers

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18 Scopus citations

Abstract

The spin relaxation processes within the pyrochlore Ho₂Ru ₂O₇ have been investigated by neutron scattering and bulk property techniques. A single-ion process, that is thermally activated, dominates the spin-spin relaxation spectrum above 2 K. Assuming Arrhenius behaviour, we found an activation energy Δ ≤ (329 ± 6) K and characteristic relaxation time τ₀ ≤ (5.2 ± 0.3) × 10^-12s in the paramagnetic state, akin to those found in the spin ice, Ho₂Ti₂O₇. Atlow temperature (T<95K) the activation energy lowers and below 20K the entropy and ac susceptibility are similar to that observed in other spin ice compounds within a 10kOe field.

Original language	English
Pages (from-to)	7089-7095
Number of pages	7
Journal	Journal of Physics Condensed Matter
Volume	17
Issue number	44
DOIs	https://doi.org/10.1088/0953-8984/17/44/002
State	Published - Nov 9 2005
Externally published	Yes

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title = "Spin dynamics in Ho2Ru2O7",

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AU - Gardner, J. S.

AU - Cornelius, A. L.

AU - Chang, L. J.

AU - Prager, M.

AU - Brückel, Th

AU - Ehlers, G.

PY - 2005/11/9

Y1 - 2005/11/9

N2 - The spin relaxation processes within the pyrochlore Ho2Ru 2O7 have been investigated by neutron scattering and bulk property techniques. A single-ion process, that is thermally activated, dominates the spin-spin relaxation spectrum above 2 K. Assuming Arrhenius behaviour, we found an activation energy Δ ≤ (329 ± 6) K and characteristic relaxation time τ0 ≤ (5.2 ± 0.3) × 10-12s in the paramagnetic state, akin to those found in the spin ice, Ho2Ti2O7. Atlow temperature (T<95K) the activation energy lowers and below 20K the entropy and ac susceptibility are similar to that observed in other spin ice compounds within a 10kOe field.

AB - The spin relaxation processes within the pyrochlore Ho2Ru 2O7 have been investigated by neutron scattering and bulk property techniques. A single-ion process, that is thermally activated, dominates the spin-spin relaxation spectrum above 2 K. Assuming Arrhenius behaviour, we found an activation energy Δ ≤ (329 ± 6) K and characteristic relaxation time τ0 ≤ (5.2 ± 0.3) × 10-12s in the paramagnetic state, akin to those found in the spin ice, Ho2Ti2O7. Atlow temperature (T<95K) the activation energy lowers and below 20K the entropy and ac susceptibility are similar to that observed in other spin ice compounds within a 10kOe field.

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Spin dynamics in Ho₂Ru₂O₇

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