Autor: Nikitin, S. A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Magnetic Properties of GdMn$\text{}_{x}$Fe$\text{}_{1-x}$Si intermetallic Compounds
Autorzy:: Nikitin, S. A.
Ivanova, T. I.
Tskhadadze, I. A.
Powiązania:: https://bibliotekanauki.pl/articles/1956493.pdf
Data publikacji:: 1997-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.20.En
Opis:: Magnetic properties of GdMn$\text{}_{x}$Fe$\text{}_{1-x}$Si (x = 1, 0.9, 0.8, 0.7, 0.6, 0) compounds were investigated. Both GdMnSi and GdFeSi crystallize in the CeFeSi-type tetragonal structure and form a complete solid solution without any change in the crystal structure. Magnetic measurements were made in static magnetic fields up to 1 MA/m in the temperature range from 77 K to 420 K. For GdFeSi these measurements were carried out on single crystal sample. It was found that the increase in Fe content leads to a sharp decrease in saturation magnetic moment. The Curie temperature increases in the concentration range 0.7 ≤ x ≤ 1 and monotonously decreases for x ≤ 0.6. These effects could be explained by strong dependence of the exchange integrals on the interatomic distances.
Źródło:: Acta Physica Polonica A; 1997, 91, 2; 463-466
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Time Differential Perturbed Angular γγ-Correlation Studies of Diethylenetriaminepentaacetic Acid Complexes with $\text{}^{111}$In and $\text{}^{111m}$Cd
Autorzy:: Shpinkova, L. G.
Carbonari, A. W.
Nikitin, S. M.
Mestnik-Filho, J.
Powiązania:: https://bibliotekanauki.pl/articles/2029030.pdf
Data publikacji:: 2001-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 23.20.En
23.40.-s
61.66.Hq
Opis:: Static and dynamic electric quadrupole interactions of $\text{}^{111}$Cd in complexes with diethylenetriaminepentaacetic acid were studied by the time differential perturbed angular γγ-correlation technique using two parent isotopes, $\text{}^{111}$In(EC)$\text{}^{111}$Cd and $\text{}^{111 m}$Cd. The measurements were carried out using neutral aqueous solutions of the diethylenetriaminepentaacetic- acid-complexes with initial isotopes at 293 K and 77 K. It was shown that the $\text{}^{111}$Cd-diethylenetriaminepentaacetic-acid-complex in aqueous solutions at pH = 7.0 is characterised by the re-orientational correlation time of 7.7×10$\text{}^{-11}$ s and an electric field gradient V$\text{}_{zz}$=6.7(2)×10$\text{}^{21}$ V/m$\text{}^{2}$ with an asymmetry parameter η=0.75(5). A direct comparison of the electric quadrupole interaction parameters for diethylenetriaminepentaacetic- acid-complexes with $\text{}^{111}$In and $\text{}^{111m}$Cd confirmed the proposal about the fragmentation of the complexes caused by the after-effects of electron capture in $\text{}^{111}$In. An observed difference in the electric quadrupole interaction parameters obtained for the solutions with $\text{}^{111}$In and $\text{}^{111m}$Cd complexes reflects a process of a chemical rearrangement of the complex structure after the In decay into Cd
Źródło:: Acta Physica Polonica A; 2001, 100, 5; 799-805
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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