High pressure phase transition and elastic properties of covalent heavy rare-earth Antimonides |
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Authors: | Purvee Bhardwaj Sadhna Singh |
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Institution: | (1) High Pressure Physics Laboratory, Department of Physics, Barkatullah University, Bhopal, 462026, India |
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Abstract: | In the present paper, we report an investigation into the high-pressure structural phase transition of rare earth antimonides
(DySb and ErSb). A modified interaction potential model (MIPM) (including the covalency effect) has been developed. Phase
transition pressures are associated with a sudden collapse in volume, indicating the occurrence of a first order phase transition.
At compressed volumes, these compounds are found in the CsCl phase. The phase transition pressures and associated volume collapses
obtained from the potential model developed here show a generally better agreement with available experimental data than others
available in the literature. The elastic constants and bulk modulus are also reported. Our results are, in general, in good
agreement with experimental and theoretical data where available, and provide predictions where data are unavailable. |
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