Phase transition in CeSe, EuSe and LaSe under high pressure |
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Authors: | Sadhna Singh R K Singh Atul Gour |
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Institution: | (1) Gas Rahat Building Govindpura Bhopal, Madhya Pradesh. Bhoj (Open) University, 462016, India;(2) Institute of Professional and Scientific Studies and Research, Chaudhary Devi Lal University, Sirsa, 125055, India |
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Abstract: | The high pressure phase transition and elastic behavior of rare earth monoselenides (CeSe, EuSe and LaSe) which crystallize
in a NaCl-structure have been investigated using the three body interaction potential (TBIP) approach. These interactions
arise due to the electronshell deformation of the overlapping ions in crystals. The TBP model consists of a long range Coulomb,
three body interactions and the short range overlap repulsive forces operative up to the second neighboring ions. The authors
of this paper estimated the values of the phase transition pressure and the associated volume collapse to be closer than other
calculations. Thus, the TBIP approach also promises to predict the phase transition pressure and pressure variations of elastic
constants of lanthanide compounds.
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Keywords: | Phase transition transition pressure three body interaction elastic constants Gibbs free energy |
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