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Title: Mechanical stiffening and thermal softening of rare earth chalcogenides

The pressure and temperature dependent elastic properties such as melting temperature nature in REX; (RE = La, Pr, Eu; X = O, S, Se, Te) chalcogenides is computed with emphasis on charge transfer interactions and covalent contribution in the effective interionic interaction potential. The pressure dependent elastic constants and melting temperature confirms that REX chalcogens lattice get stiffened as a consequence of bond compression and bond strengthening, however thermal softening arose due to bond expansion and bond weakening is evidenced from temperature dependence of melting temperature (T{sub M})
Authors:
;  [1] ;  [2] ;  [3]
  1. School of Physics, Vigyan Bhavan, Devi Ahilya University, Khandwa Road Campus, Indore-452001 (India)
  2. Department of Physics, Ranchi College, Ranchi University Ranchi- 834008, Jharkhand (India)
  3. Department of Physics, M. B. Khalsa College, Raj Mohallah, Indore-452002 (India)
Publication Date:
OSTI Identifier:
22269326
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHALCOGENIDES; ELASTICITY; INTERACTIONS; MELTING POINTS; PRESSURE DEPENDENCE; RARE EARTHS; TEMPERATURE DEPENDENCE