Eur. Phys. J. B 83, 23-28 (2011)
https://doi.org/10.1140/epjb/e2011-20455-8

Structural phase transition and elastic properties of cerium chalcogenides at high pressure

¹ Department of Applied Science, Kumaon Engineering College, 263653 Dwarahat, India
² Department of Computer Science, Kumaon Engineering College, 263653 Dwarahat, India

Corresponding author: ^a kuldeep_phy1@rediffmail.com

Received: 10 June 2011
Published online: 15 September 2011

Abstract

The structural and elastic properties of cerium chalcogenides (CeZ, Z = S, Se, Te) under high pressure have been investigated by using the potential model considered up to third nearest neighbor interaction. The computed values of B1-B2 phase transition pressure, equation of state (compression curve), bulk modulus, its first order pressure derivative and elastic constants in the case of cerium chalcogenides agree well with the experimental results. The present study shows the anomalous behavior of cerium chalcogenides in comparison to the alkaline earth chalcogenides, due to the presence of Kondo effect and reentrant valence behavior of Ce in cerium chalcogenides.