Brillouin-scattering study of the liquid-glass transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CaKNO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>: Mode-coupling analysis

Tao, Nongjian; Li, G.; Cummins, H. Z.

doi:10.1103/physrevb.45.686

Cited by 44 publications

(21 citation statements)

References 52 publications

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“…The discrepancy between these calculated values and our results shown in the middle section of Figure 2 is an indication that it is necessary to use the generalized hydrodynamic equation 22,23 in order to obtain a physically consistent description of this material.…”

Section: Discussioncontrasting

confidence: 55%

“…This more general expression is most commonly encountered in data analysis of glass-forming materials 22,23 where the additional frequency dependence is postulated to arise from the glass-forming nature of the material. Even in the case of glasses it has recently been shown that excellent fits can also be obtained with the "ordinary" hydrodynamic expression.…”

Section: Discussionmentioning

confidence: 97%

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λ Transition in Liquid Sulfur Studied by Brillouin Scattering

et al. 1996

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Liquid sulfur was studied by Brillouin scattering from the melting point up to 200°C. Polarized spectra show no evidence of the λ transition. The velocity of sound extracted from the Brillouin spectra agrees with previous ultrasonic measurements. The width of the central line in the depolarized spectra exhibits a maximum near the λ transition temperature; this is in qualitative agreement with the known maximum in viscosity.

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Section: Discussioncontrasting

confidence: 55%

Section: Discussionmentioning

confidence: 97%

λ Transition in Liquid Sulfur Studied by Brillouin Scattering

et al. 1996

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“…͑2.6c͒ and ͑2.7b͒, in which the amplitude of Ј( min ) is proportional to ͱTϪT c . Following procedures similar to others already used in this case, 28,29 we first determined by direct inspection approximate values of min and Ј( min ) for all the spectra where this was possible, i.e., for 233 KϽTϽ290 K, and we fitted the region of the minimum with Eq. ͑2.6c͒ ͑see Fig.…”

Section: ͑42͒mentioning

confidence: 99%

Light scattering study of the liquid–glass transition of meta-toluidine

Aouadi

Dreyfus

Massot

et al. 2000

The Journal of Chemical Physics

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Articles you may be interested inDensity and confinement effects of glass forming m-toluidine in nanoporous Vycor investigated by depolarized dynamic light scattering A dynamic light scattering study of the hypersonic relaxation in liquid toluene Dynamics of liquid-glass transition in propanol AIP Conf. Proc. 469, 525 (1999); 10.1063/1.58534 Crystalization in the glass-forming materials: [KNO 3 ] X [Ca(NO 3 ) 2 ] 1−X and Brillouin scattering study of glass transition in X=0.64 mixture AIP Conf.An experimental study of the glass transition of meta-toluidine combining several light scattering techniques was performed. The structural relaxation time is measured in depolarized geometry from the glass transition temperature up to well above the melting point and found to vary over 13 time decades. An analysis by means of the idealized Mode Coupling Theory shows that, as found in other aromatic liquids, experimental results obtained in depolarized light scattering can be described by this theory above T c in a two-decade frequency range. The polarized Brillouin doublet, measured in the backscattering geometry between 176 K and 300 K, is also analyzed. None of the sets of parameters we obtained in fitting those spectra could fulfil all the requirements of this Mode Coupling Theory.

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“…One of a very powerful tool in studies of glasses is Brillouin spectroscopy since it has been shown to give valuable information on the dynamical properties of glass-forming materials in the gigahertz region. [1][2][3][4][5][6][7][8] The relaxational processes have been extensively studied for glass formers without directional bonds, which show a similar high increase of viscosity upon supercooling and are called fragile systems. 3,6,7 The dynamics of these fragile systems is relatively well understood on the basis of mode coupling theory.…”

Section: Introductionmentioning

confidence: 99%

Heat capacity, Raman, and Brillouin scattering studies of M2O–MgO–WO3–P2O5 glasses (M=K,Rb)

Mączka

Hanuza

Baran

et al. 2006

The Journal of Chemical Physics

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The authors report the results of temperature-dependent Brillouin scattering from both transverse and longitudinal acoustic waves, heat capacity studies as well as room temperature Raman scattering studies on M 2 O-MgO-WO 3 -P 2 O 5 glasses ͑M=K,Rb͒. These results were used to obtain information about structure and various properties of the studied glasses such as fragility, elastic moduli, ratio of photoelastic constants, and elastic anharmonicity. They have found that both glasses have similar properties but replacement of K + ions by Rb + ions in the glass network leads to decrease of elastic parameters and P 44 photoelastic constant due to increase of fragility. Based on Brillouin spectroscopy they show that a linear correlation between longitudinal and shear elastic moduli holds over a large temperature range. This result supports the literature data that the Cauchy-type relation represents a general rule for amorphous solids. An analysis of the Boson peak revealed that the form of the frequency distribution of the excess density of states is in agreement with the Euclidean random matrix theory. The reason of the observed shift of the maximum frequency of the Boson peak when K + ions are substituted for Rb + ions is also briefly discussed.

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Brillouin-scattering study of the liquid-glass transition inCaKNO3: Mode-coupling analysis

Cited by 44 publications

References 52 publications

λ Transition in Liquid Sulfur Studied by Brillouin Scattering

λ Transition in Liquid Sulfur Studied by Brillouin Scattering

Light scattering study of the liquid–glass transition of meta-toluidine

Heat capacity, Raman, and Brillouin scattering studies of M2O–MgO–WO3–P2O5 glasses (M=K,Rb)

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