Journal ArticleDOI
Calculation of Magnetic and Electric Hyperfine Fields in Metals
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In this paper, the origin of hyperfine fields in ferromagnetic iron and cobalt is discussed, and the implications of theoretical results in pure metals for nuclear quadrupole interaction in alloys is discussed.Abstract:
This article is divided into two parts. The first part deals with the theory of the origin of hyperfine fields in ferromagnetic iron and cobalt, while the second part deals with the theory of nuclear quadrupole interaction in pure non-cubic metals. In the first part, dealing with hyperfine fields in ferromagnets, the various mechanisms that can produce the hyperfine field are reviewed and their contributions, as obtained from calculated band wave-functions are analysed. Comparison is made with experiment and the possible improvements needed in the electric theory are discussed. In the second part of the article, the electronic field-gradients in a number of hcp metals are discussed. The ionic and electron contributions are analysed and comparison is made with experimental data with respect to both magnitude and sign of the quadrupole coupling constants where available. The nature of the accuracy to be expected from the use of wave-functions obtained by actual potentials and pseudo-potentials is discussed. The implications of theoretical results in the pure metals for nuclear quadrupole interaction in alloys is discussed. In the alloys, a substantial amount of experimental data is available currently by the perturbed angular correlation and other techniques.read more
Citations
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Journal ArticleDOI
The electric field gradient in noncubic metals
Journal ArticleDOI
Temperature dependence of the electric field gradient in noncubic metals
TL;DR: In this article, the quadrupole hyperfine interaction of Ga, In, Sn, and of 67Zn, 69Ge in Zn was measured with high accuracy using TDPAC and TDPAD methods.
Journal ArticleDOI
Recent developments in the analysis of electric field gradients in metals
K. Nishiyama,D. Riegel +1 more
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Nuclear quadrupole alignment ofLum176andLu177in a lutetium single crystal at low temperatures and systematics of electric field gradients in pure hexagonal transition metals
TL;DR: In this paper, a new classification of electric field gradients in hexagonal metals is proposed: the electronic contribution to the total electric field gradient is proportional to the ionic part.
Journal ArticleDOI
Systematics of electric field gradients in metals
TL;DR: In this paper, an intensive study of electric field gradients (EFG) at the site of atomic nuclei in noncubic metals has revealed several systematic trends, e.g. in the relation of the total EFG to the so called lattice EFG as well as in its variation with temperature.
References
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Book
Introduction to solid state physics
TL;DR: In this paper, the Hartree-Fock Approximation of many-body techniques and the Electron Gas Polarons and Electron-phonon Interaction are discussed.
Journal ArticleDOI
Electron correlations in narrow energy bands
TL;DR: In this paper, the Hartree-Fock approximation of the correlation problem for the d-and f-bands was applied to a simple, approximate model for the interaction of electrons in narrow energy bands.
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New method for calculating the one-particle green's function with application to the electron-gas problem
TL;DR: In this paper, a set of self-consistent equations for the one-electron Green's function have been derived, which correspond to an expansion in a screened potential rather than the bare Coulomb potential.