Abstract
A curve of the melting point of iron up to 200 GPa is constructed on the basis of the Lindemann criterion. The transverse velocity of sound, needed for determining the Debye temperature, is calculated with allowance for ionization by pressure. The compression dependence of the concentration of free electrons is ascertained via the band structure of the metal obtained for various compression ratios by solving the Hartree-Fock-Slater equations of a self-consistent field in the Wigner—Seitz approximation of spherical cells. The calculated curve is compared with the experimental melting-point curve.
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References
S. M. Stishov,Usp. Fiz. Nauk,96, Issue 3, 467–496 (1968).
S. M. Stishov,Usp. Fiz. Nauk,114, Issue 1, 3–40 (1974).
V. V. Kechin,Zh. Fiz. Khim.,71, No. 3, 391–394 (1997).
Q. R. Williams, R. Jeanloz, J. Bass, and T. J. Ahrens,Science,236, 181–182 (1987).
C. S. Yoo, N. C. Holmes, D. J. Webb, and C. Pike,Phys. Rev. Lett.,70, 3931–3934 (1993).
V. D. Urlin,Zh. Eksp. Teor. Fiz.,49, Issue 2 (8), 485–492 (1965).
S. K. Saxena, G. Shen, and P. Lazor,Science,264, 405–407 (1994).
R. Boehler,Nature,363, 534–536 (1993).
R. Boehler,Phil. Trans. R. Soc. Lond.,A354, 1265–1278 (1996).
E. Yu. Tonkov,Phase Diagrams of Elements at High Pressure [in Russian], Moscow (1979).
D. A. Kirzhnits,Usp. Fiz. Nauk,104, Issue 3, 489–508 (1974).
V. S. Vorob’ev,Zh. Éksp. Teor. Fiz.,110, Issue 2 (8), 683–695 (1996).
J. Enderby and M. March, in:Phase Stability in Metals and Alloys [Russian translation], Moscow (1970), pp. 28–46.
D. Pines,Elementary Excitations in Solids [Russian translation], Moscow (1965).
J. Bardeen and D. Pines,Phys. Rev.,99, No. 4, 1140–1150 (1955).
A. F. Nikiforov, V. G. Novikov, and V. B. Uvarov,Teplofiz. Vys. Temp.,25, No. 1, 12–21 (1987).
A. I. Voropinov, G. M. Gandel’man, and V. G. Podval’nyi,Usp. Fiz. Nauk,100, Issue 2, 193–224 (1970).
F. N. Borovik, A. M. El’yashevich, and G. S. Romanov,Dokl. Akad. Nauk BSSR,31, No. 2, 127–130 (1987).
C. B. Clark,Phys. Rev.,109, No. 4, 1133–1141 (1958).
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Borovik, F.N., Romanov, G.S. Theoretical study of the curve of the melting point of iron with allowance for ionization by pressure. J Eng Phys Thermophys 72, 1025–1029 (1999). https://doi.org/10.1007/BF02699447
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DOI: https://doi.org/10.1007/BF02699447