Temperature Dependence of Fourth‐Order Elastic Constants of Alkali Halide Crystals

Varshney, R. K.; Shanker, J.

doi:10.1002/pssb.2221290106

Cited by 18 publications

(5 citation statements)

References 25 publications

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“…Expressions obtained in this work are more general than those derived previously [23,24]. This treatment gave the possibility to understand the temperature dependences of elastic constants, as well as to secure more exact values of parameters for characterizing the material.…”

Section: Resultsmentioning

confidence: 72%

Temperature Dependent Anharmonic Properties of Lead Chalcogenides

Raju

2010

Acta Phys. Pol. A

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Calculations were made to investigate the anharmonic properties of lead chalcogenides PbS, PbSe and PbTe at elevated temperatures by means of primary physical parameters viz. nearest-neighbour distance and hardness parameter using long-and short-range potentials. Higher-order elastic constants are computed up to their melting temperature for these crystals. The first order pressure derivatives of second-and third-order elastic constants, the second-order pressure derivatives of second-order elastic constants and partial contractions are also evaluated at different temperatures. As the experimental elastic constants are not available at high temperatures, hence our results were only compared with the available values obtained at room temperature. The nature of the elastic behaviour in these compounds was analyzed.

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Section: Resultsmentioning

confidence: 72%

Temperature Dependent Anharmonic Properties of Lead Chalcogenides

Raju

2010

Acta Phys. Pol. A

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“…In existing literature, the order of agreement between comparison values is reasonably good, except in few cases. Expressions obtained in this work are more general than those derived previously [41][42][43]. The values reported in this paper could not be compared for elevated temperatures due to the lack of availability of the corresponding experimental data on them.…”

Section: Resultsmentioning

confidence: 87%

High temperature elastic anharmonicity in lanthanum mono-chalcogenides

Raju

2011

Can. J. Phys.

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The elastic behaviour of lanthanum mono-chalcogenides is investigated at elevated temperatures. This study includes second-and third-order elastic constants of compound semiconductors LaS, LaSe, and LaTe, starting from primary physical parameters, that is, nearest neighbour distance and hardness parameters, assuming long-and short-range potentials. The variations of elastic constants with temperature follow a systematic trend identical to that observed in other chalcogenides in the NaCl-type structure family. The present approach can also succeed in predicting the pressure derivatives of the elastic constants. The obtained results are compared with available theoretical data and are found to be in satisfactory agreement with present values.PACS Nos: 62.20.dc, 81.40.Jj, 63.20.kg Résumé : Nous étudions ici le comportement élastique de chalcogénures simples de lanthane à haute température. Nous incluons les constantes élastiques de second et troisième ordre des semi-conducteurs LaS, LaSe et LaTe, commençant avec les paramètres physiques primaires, comme la distance entre plus proches voisins et le paramètre de dureté, supposant des potentiels de courte et de longue portée. La variation en température des constantes élastiques suit une tendance systématique identique à celle observée dans d'autres chalcogénures de la famille NaCl. Notre approche peut également prédire les déri-vées des constantes par rapport à la pression. Les résultats obtenus sont comparés aux résultats théoriques existants avec lesquels ils sont en bon accord.[Traduit par la Rédaction]

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“…2. Expressions obtained in this work are more general than those derived previously [40,41]. This is in view of the fact that one has taken the thermal expansion coefficient [15,[31][32][33] into account.…”

Section: Resultsmentioning

confidence: 95%