Improved Versions of Fielek Model for BCC Transition Metals

Author:

Khanna R. N.1,Rathore R. P. S.2

Affiliation:

1. Department of Physics, R. E. I. College, Dayalbagh, Agra (India).

2. Department of Physics, R. B. S. College, Agra (India)

Abstract

Abstract Three improved versions of the Fielek Model are developed and discussed. The first model uses a modified Bhatia scheme for the volume interaction in place of the Krebs scheme. The second and third model assumes the core-core couplings to be central pairwise effective upto first neighbours only. The second model describes the d-shell-d-shell interaction on the same lines as those adopted for core-core interactions, while the third model assumes these interactions to be of the many body type. Suitable equilibrium conditions for the second and the third model are developed. These improved versions are employed to derive dispersion relations in tantalum. Comparison of these relations with-each other and also with the experimental findings leads to some important conclusions regarding the nature and range of the interactions coupling the various constituents of a bcc transition metal like tantalum.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Lattice Equilibrium and Phonons in Molybdenum and Tungsten;physica status solidi (b);1984-01-01

2. Shell models for B.C.C. transition metals;physica status solidi (b);1981-09-01

3. Improved forms of Fielek model and their application to fcc non simple metals;Acta physica Academiae Scientiarum Hungaricae;1981-06

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