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Type: Artigo de periódico
Title: High-resolution neutron scattering study of Tb2Mo2O7: A geometrically frustrated spin glass
Author: Ehlers, G
Greedan, JE
Stewart, JR
Rule, KC
Fouquet, P
Cornelius, AL
Adriano, C
Pagliuso, PG
Qiu, Y
Gardner, JS
Abstract: The low-temperature magnetic properties of Tb2Mo2O7 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 T-g similar to 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 angstrom. 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 h omega(0) similar to 0.28 meV. This dispersionless crystal electric field transition is measurable up to 60 K.
Country: EUA
Editor: Amer Physical Soc
Citation: Physical Review B. Amer Physical Soc, v. 81, n. 22, 2010.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.81.224405
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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