Polarized inelastic neutron scattering of the partially ordered Tb2 Sn2 O7

K. C. Rule; G. Ehlers; J. R. Stewart; A. L. Cornelius; P. P. Deen; Y. Qiu; C. R. Wiebe; J. A. Janik; H. D. Zhou; D. Antonio; B. W. Woytko; J. P. Ruff; H. A. Dabkowska; B. D. Gaulin; J. S. Gardner

doi:10.1103/PhysRevB.76.212405

Polarized inelastic neutron scattering of the partially ordered Tb2 Sn2 O7

K. C. Rule, G. Ehlers, J. R. Stewart, A. L. Cornelius, P. P. Deen, Y. Qiu, C. R. Wiebe, J. A. Janik, H. D. Zhou, D. Antonio, B. W. Woytko, J. P. Ruff, H. A. Dabkowska, B. D. Gaulin, J. S. Gardner

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Abstract

We present inelastic neutron scattering results on the geometrically frustrated pyrochlore Tb2 Sn2 O7. At high temperature T>50 K, this system resembles the cooperative paramagnet Tb2 Ti2 O7, while at low temperature T∼60 mK, it displays remarkably different behavior. Powder neutron scattering, susceptibility, and specific heat techniques have shown that below 0.87 K Tb2 Sn2 O7 enters a partially ordered state that is characterized by two-sublattice ferrimagnetic long-range order which coexists with paramagnetic spin components. We show that (i) the low-temperature state produces a large internal field and collective excitations and (ii) the coexisting paramagnetic state persists down to 0.1 K, with spins fluctuating at a rate greater than 0.04 THz, resulting in a diffuse magnetic background to the diffraction patterns. A low-lying excitation at 1.2 meV partially softens as short-range correlations build up while cooling in the paramagnetic state.

Original language	English
Article number	212405
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	76
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.76.212405
State	Published - Dec 21 2007
Externally published	Yes

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Rule, K. C., Ehlers, G., Stewart, J. R., Cornelius, A. L., Deen, P. P., Qiu, Y., Wiebe, C. R., Janik, J. A., Zhou, H. D., Antonio, D., Woytko, B. W., Ruff, J. P., Dabkowska, H. A., Gaulin, B. D., & Gardner, J. S. (2007). Polarized inelastic neutron scattering of the partially ordered Tb2 Sn2 O7. Physical Review B - Condensed Matter and Materials Physics, 76(21), Article 212405. https://doi.org/10.1103/PhysRevB.76.212405

@article{6f2bcc2c59654023a9896785d8bb202a,

title = "Polarized inelastic neutron scattering of the partially ordered Tb2 Sn2 O7",

abstract = "We present inelastic neutron scattering results on the geometrically frustrated pyrochlore Tb2 Sn2 O7. At high temperature T>50 K, this system resembles the cooperative paramagnet Tb2 Ti2 O7, while at low temperature T∼60 mK, it displays remarkably different behavior. Powder neutron scattering, susceptibility, and specific heat techniques have shown that below 0.87 K Tb2 Sn2 O7 enters a partially ordered state that is characterized by two-sublattice ferrimagnetic long-range order which coexists with paramagnetic spin components. We show that (i) the low-temperature state produces a large internal field and collective excitations and (ii) the coexisting paramagnetic state persists down to 0.1 K, with spins fluctuating at a rate greater than 0.04 THz, resulting in a diffuse magnetic background to the diffraction patterns. A low-lying excitation at 1.2 meV partially softens as short-range correlations build up while cooling in the paramagnetic state.",

author = "Rule, {K. C.} and G. Ehlers and Stewart, {J. R.} and Cornelius, {A. L.} and Deen, {P. P.} and Y. Qiu and Wiebe, {C. R.} and Janik, {J. A.} and Zhou, {H. D.} and D. Antonio and Woytko, {B. W.} and Ruff, {J. P.} and Dabkowska, {H. A.} and Gaulin, {B. D.} and Gardner, {J. S.}",

year = "2007",

month = dec,

day = "21",

doi = "10.1103/PhysRevB.76.212405",

language = "English",

volume = "76",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "21",

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Rule, KC, Ehlers, G, Stewart, JR, Cornelius, AL, Deen, PP, Qiu, Y, Wiebe, CR, Janik, JA, Zhou, HD, Antonio, D, Woytko, BW, Ruff, JP, Dabkowska, HA, Gaulin, BD & Gardner, JS 2007, 'Polarized inelastic neutron scattering of the partially ordered Tb2 Sn2 O7', Physical Review B - Condensed Matter and Materials Physics, vol. 76, no. 21, 212405. https://doi.org/10.1103/PhysRevB.76.212405

TY - JOUR

T1 - Polarized inelastic neutron scattering of the partially ordered Tb2 Sn2 O7

AU - Rule, K. C.

AU - Ehlers, G.

AU - Stewart, J. R.

AU - Cornelius, A. L.

AU - Deen, P. P.

AU - Qiu, Y.

AU - Wiebe, C. R.

AU - Janik, J. A.

AU - Zhou, H. D.

AU - Antonio, D.

AU - Woytko, B. W.

AU - Ruff, J. P.

AU - Dabkowska, H. A.

AU - Gaulin, B. D.

AU - Gardner, J. S.

PY - 2007/12/21

Y1 - 2007/12/21

N2 - We present inelastic neutron scattering results on the geometrically frustrated pyrochlore Tb2 Sn2 O7. At high temperature T>50 K, this system resembles the cooperative paramagnet Tb2 Ti2 O7, while at low temperature T∼60 mK, it displays remarkably different behavior. Powder neutron scattering, susceptibility, and specific heat techniques have shown that below 0.87 K Tb2 Sn2 O7 enters a partially ordered state that is characterized by two-sublattice ferrimagnetic long-range order which coexists with paramagnetic spin components. We show that (i) the low-temperature state produces a large internal field and collective excitations and (ii) the coexisting paramagnetic state persists down to 0.1 K, with spins fluctuating at a rate greater than 0.04 THz, resulting in a diffuse magnetic background to the diffraction patterns. A low-lying excitation at 1.2 meV partially softens as short-range correlations build up while cooling in the paramagnetic state.

AB - We present inelastic neutron scattering results on the geometrically frustrated pyrochlore Tb2 Sn2 O7. At high temperature T>50 K, this system resembles the cooperative paramagnet Tb2 Ti2 O7, while at low temperature T∼60 mK, it displays remarkably different behavior. Powder neutron scattering, susceptibility, and specific heat techniques have shown that below 0.87 K Tb2 Sn2 O7 enters a partially ordered state that is characterized by two-sublattice ferrimagnetic long-range order which coexists with paramagnetic spin components. We show that (i) the low-temperature state produces a large internal field and collective excitations and (ii) the coexisting paramagnetic state persists down to 0.1 K, with spins fluctuating at a rate greater than 0.04 THz, resulting in a diffuse magnetic background to the diffraction patterns. A low-lying excitation at 1.2 meV partially softens as short-range correlations build up while cooling in the paramagnetic state.

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U2 - 10.1103/PhysRevB.76.212405

DO - 10.1103/PhysRevB.76.212405

M3 - Article

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SN - 1098-0121

VL - 76

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 21

M1 - 212405

ER -

Polarized inelastic neutron scattering of the partially ordered Tb2 Sn2 O7

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