High-resolution neutron scattering study of Tb2 Mo2 O7: A geometrically frustrated spin glass

G. Ehlers; J. E. Greedan; J. R. Stewart; K. C. Rule; P. Fouquet; A. L. Cornelius; C. Adriano; P. G. Pagliuso; Y. Qiu; J. S. Gardner

doi:10.1103/PhysRevB.81.224405

High-resolution neutron scattering study of Tb₂ Mo₂ O₇: A geometrically frustrated spin glass

G. Ehlers, J. E. Greedan, J. R. Stewart, K. C. Rule, P. Fouquet, A. L. Cornelius, C. Adriano, P. G. Pagliuso, Y. Qiu, J. S. Gardner

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Abstract

The low-temperature magnetic properties of Tb₂ Mo₂ O₇ have been studied with bulk susceptibility measurements and with elastic and high-resolution inelastic neutron scattering. This system is a spin glass with a freezing temperature Tg ∼25 K. A reverse Monte Carlo simulation of the neutron diffraction data shows weak ferromagnetic near-neighbor spatial correlations that do not extend beyond 10 Å. Neutron measurements of the spin dynamics reveal a slowing down with decreasing temperature without an anomaly at the glass transition. A low-lying Q -independent mode is seen at ω0 ∼0.28 meV. This dispersionless crystal electric field transition is measurable up to 60 K.

Original language	English
Article number	224405
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.81.224405
State	Published - Jun 2 2010
Externally published	Yes

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Ehlers, G., Greedan, J. E., Stewart, J. R., Rule, K. C., Fouquet, P., Cornelius, A. L., Adriano, C., Pagliuso, P. G., Qiu, Y., & Gardner, J. S. (2010). High-resolution neutron scattering study of Tb₂ Mo₂ O₇: A geometrically frustrated spin glass. Physical Review B - Condensed Matter and Materials Physics, 81(22), Article 224405. https://doi.org/10.1103/PhysRevB.81.224405

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abstract = "The low-temperature magnetic properties of Tb2 Mo2 O7 have been studied with bulk susceptibility measurements and with elastic and high-resolution inelastic neutron scattering. This system is a spin glass with a freezing temperature Tg ∼25 K. A reverse Monte Carlo simulation of the neutron diffraction data shows weak ferromagnetic near-neighbor spatial correlations that do not extend beyond 10 {\AA}. Neutron measurements of the spin dynamics reveal a slowing down with decreasing temperature without an anomaly at the glass transition. A low-lying Q -independent mode is seen at ω0 ∼0.28 meV. This dispersionless crystal electric field transition is measurable up to 60 K.",

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doi = "10.1103/PhysRevB.81.224405",

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T2 - A geometrically frustrated spin glass

AU - Ehlers, G.

AU - Greedan, J. E.

AU - Stewart, J. R.

AU - Rule, K. C.

AU - Fouquet, P.

AU - Cornelius, A. L.

AU - Adriano, C.

AU - Pagliuso, P. G.

AU - Qiu, Y.

AU - Gardner, J. S.

PY - 2010/6/2

Y1 - 2010/6/2

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AB - The low-temperature magnetic properties of Tb2 Mo2 O7 have been studied with bulk susceptibility measurements and with elastic and high-resolution inelastic neutron scattering. This system is a spin glass with a freezing temperature Tg ∼25 K. A reverse Monte Carlo simulation of the neutron diffraction data shows weak ferromagnetic near-neighbor spatial correlations that do not extend beyond 10 Å. Neutron measurements of the spin dynamics reveal a slowing down with decreasing temperature without an anomaly at the glass transition. A low-lying Q -independent mode is seen at ω0 ∼0.28 meV. This dispersionless crystal electric field transition is measurable up to 60 K.

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High-resolution neutron scattering study of Tb₂ Mo₂ O₇: A geometrically frustrated spin glass

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