Electronic transport properties of liquid lanthanides

P.B. Thakor,Y.A. Sonvane,A.R. Jani,P.N. Gajjar

doi:10.5185/amlett.indias.200

Abstract

The electronic transport properties like electrical resistivity (ρ), thermoelectric power (Q) and thermal conductivity (σ) of liquid lanthanides are calculated through Ziman’s formulism. To describe electron-ion interaction we have used our newly constructed parameter free model potential alongwith Percus Yevick hard sphere (PYHS) reference system. To see the influence of exchange and correlation effect on the electronic transport properties, we have used five different local field correction functions like Hartree (H), Sarkar et al. (S), Taylor (T), Ichimaru Utsumi (IU) and Farid et al. (F). The obtained results have found good in agreement with available experimental data as well as other theoretical data. Lastly, we conclude that our newly constructed model potential is capable to explain the electronic transport properties of liquid lanthanides.

Highlights

The electronic transport properties of liquid lanthanides near the melting point have not been studied experimentally up to date, the unique character of the electronic structure and the wide application of these metals in engineering and technology attract permanent interest in their transport properties [1]
The experimental data on the structure factors obtained by neutron and X-ray diffraction methods are available only for some liquid lanthanides near their melting points [4]
In our literature survey [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21], we have found that only one attempt to study the electronic transport properties of full liquid lanthanides series

Summary

Introduction

The electronic transport properties of liquid lanthanides near the melting point have not been studied experimentally up to date, the unique character of the electronic structure and the wide application of these metals in engineering and technology attract permanent interest in. Vora [12] and Baria [14] have calculated electrical resistivity of f shell liquid metal like La, Ce, Eu, Gd, Yb and Lu using the Ziman’s formalism They have fitted valency (Z) or potential parameter (rc) in such a way that their results are found in good agreement with the experimental data. There are significant improvements in the present results are found in the case of electrical resistivity (ρ) (except La, Ce, Pr, Nd, Pm & Sm) and thermoelectric power (Q) than the others’ results obtained by Vora [12] using the Ashcroft’s empty core model potential [28] This confirms the validity of our model potential to explain the electronic transport properties of liquid lanthanides

Conclusion

Findings

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