Temat: band-structure - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Understanding electron-positron momentum densities in solids : effect of the positron distribution
Autorzy:: Rubaszek, A.
Powiązania:: https://bibliotekanauki.pl/articles/147180.pdf
Data publikacji:: 2015
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: positron annihilation
electronic band structure
positron states
Opis:: The influence of the positron distribution on the electron-positron (e-p) momentum densities (MDs) is studied in terms of the l (l = s, p, d, f) character of the initial electronic state. The effect of the positron is discussed for momenta in the extended and reduced zone scheme on the example of Al (simple metal), Cu (metal with almost filled d shell), and Cr (transition metal). Present result indicates a weak sensitivity of the e-p MD inside the central Fermi surface to the positron charge density for the delocalized s and p electrons. In the case of d states, the effect of the positron on the relevant contribution to the e-p MD directly reflects the degree of localization of d electrons in the electron density of states.
Źródło:: Nukleonika; 2015, 60, No. 4, part 1; 759-763
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Mössbauer effect studies of Dy(Fe0.4-xNixCo0.6)2
Autorzy:: Jabłońska, A.
Suwalski, J.
Stoch, P.
Pszczoła, J.
Guzdek, P.
Szamański, P.
Pańta, A.
Powiązania:: https://bibliotekanauki.pl/articles/148209.pdf
Data publikacji:: 2007
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: crystal structure
Mössbauer effect
hyperfine interaction
Slater-Pauling curve
band structure
Opis:: A consequence of the Fe/Ni substitution in the Dy(Fe0.4Co0.6)2 compound was studied in the present paper. For this purpose the synthesis and X-ray analysis (295 K) of the Dy(Fe0.4 xNixCo0.6)2 series were performed. The cubic, MgCu2-type, Fd3m crystal structure was observed across the series. 57Fe Mössbauer effect spectra for the series were collected at 77 K. The obtained crystallographic data and the hyperfine interaction parameters are presented. The magnetic hyperfine fields form a separate branch of the Slater-Pauling curve known for the Dy(Mn1 xFex)2 and Dy(Fe1 xCox)2 series. The data are qualitatively related to the Stoner model.
Źródło:: Nukleonika; 2007, 52, supl. 1; 55-58
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Mössbauer effect studies of Dy(Fe0.7-xNixCo0.3)2 intermetallics
Autorzy:: Jabłońska, A.
Suwalski, J.
Pszczoła, J.
Guzdek, P.
Stoch, P.
Pańta, A.
Powiązania:: https://bibliotekanauki.pl/articles/147231.pdf
Data publikacji:: 2004
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: intermetallics
crystal structure
57Fe Mössbauer effect
hyperfine interactions
Slater-Pauling curve
band structure
Opis:: Abstract A consequence of the Fe/Ni substitution in the series of Dy(Fe0.7 xNixCo0.3)2 was studied in the presented paper. The synthesis and X-ray analysis (300 K) of the Dy(Fe0.7 xNixCo0.3)2 system were performed. The cubic, MgCu2-type, Fd3m crystal structure was evidenced for this solid solution. 57Fe Mössbauer effect measurements for the system were carried out at 77 K. The obtained crystallographic lattice parameters and the hyperfine interaction data are presented. The magnetic hyperfine field values form a separate branch of the Slater-Pauling curve situated above the branch corresponding to the Dy(Fe1 xCox)2 intermetallics.
Źródło:: Nukleonika; 2004, 49,suppl.3; 85-88
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

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