Anomalous temperature dependence of the low-frequency vibrational density of states in vitreous B2O3

Fernández-Perea, Ricardo; Bermejo, Francisco Javier; Bernabé, A. de; Loong, C.‐K.

doi:10.1016/s0375-9601(97)00622-1

Cited by 5 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These changes were attributed to structural relaxation. At the same time, temperature variations in canonical glasses vitreous B 2 O 3 16 and metallic glasses Al 70 Co 15 Ni 15 and Al 62 Co 15 Cu 20 Si 3 17 give rise to changes in the density of states, which were ascribed by the authors to lattice anharmonism.…”

Section: Resultsmentioning

confidence: 89%

Density of vibration states and ferroelectric properties of complex perovskites

Gvasaliya

Lushnikov²,

Sashin

et al. 2003

Journal of Applied Physics

View full text Add to dashboard Cite

We studied the effect of temperature on density of vibrational states of model complex perovskites PbMg1/3Nb2/3O3 (PMN), PbMg1/3Ta2/3O3 (PMT), and BaMg1/3Ta2/3O3 (BMT) by inelastic neutron scattering. It has been found that PMN and PMT relaxor ferroelectrics exhibit an anomalous temperature evolution of the density of vibrational states G(E), while G(E) in the BMT compound does not demonstrate any temperature evolution. It is shown that there is a correlation between the temperature behaviors of the dielectric response and vibrational spectra of all the complex perovskites studied. Possible reasons for variation in G(E) in these materials are discussed.

show abstract

Section: Resultsmentioning

confidence: 89%

Density of vibration states and ferroelectric properties of complex perovskites

Gvasaliya

Lushnikov²,

Sashin

et al. 2003

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…2) in either the low-frequency or the high-frequency energy region, within experimental error. This temperature dependence of GE in NBT is anomalous and is not likely to be associated with either the anharmonicity responsible for VDOS evolution in fused glass B 2 O 3 [22] or with the contribution of structural relaxation observed in metallic glasses [23,24]. Therefore, it is reasonable to invoke data obtained by other techniques and to see whether they correlate with the behavior of the relaxor ferroelectric NBT phonon subsystem observed by inelastic neutron scattering.…”

Section: Methodsmentioning

confidence: 88%

Temperature dependence of the generalized vibrational density of states of sodium bismuth titanate in the ferroelectric phase

Lushnikov¹,

Gvasaliya²,

Siny³

et al. 2000

Solid State Communications

View full text Add to dashboard Cite

This paper describes studies of relaxor ferroelectric Na 1/2 Bi 1/2 TiO 3 (NBT) by inelastic incoherent neutron scattering at temperatures from 50 to 300 K. Experimental time-of-¯ight spectra were recalculated into the generalized vibrational density of states (VDOS) function in terms of one-particle incoherent approximation and compared with the behavior of Raman spectra. It is shown that the VDOS of NBT in the ferroelectric phase has nontrivial temperature dependence. The relation between the temperature dependence of VDOS and the instability of the NBT crystalline lattice below room temperature is discussed.

show abstract

Stochastic resonance effects in the scattering of neutrons by modulated two-state systems

Lamberti

Condat

2000

Physica A: Statistical Mechanics and its Applications

View full text Add to dashboard Cite

Anomalous temperature dependence of the low-frequency vibrational density of states in vitreous B2O3

Cited by 5 publications

References 31 publications

Density of vibration states and ferroelectric properties of complex perovskites

Density of vibration states and ferroelectric properties of complex perovskites

Temperature dependence of the generalized vibrational density of states of sodium bismuth titanate in the ferroelectric phase

Stochastic resonance effects in the scattering of neutrons by modulated two-state systems

Contact Info

Product

Resources

About