Autor: Stanek, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Local States of Tellurium in Isolated Helical Chains
Autorzy:: Stanek, J.
Fornal, P.
Hafner, S. S.
Pfitzner, A.
Powiązania:: https://bibliotekanauki.pl/articles/2028993.pdf
Data publikacji:: 2001-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 76.80.+y
Opis:: The local electronic state of Te in the helical chains of CuXY$\text{}_{2(1-x)}$Te$\text{}_{2x}$ (X = Cl, Br; Y = Se, S) were studied using the Mössbauer spectroscopy of $\text{}^{125}$Te at 10 K and 70 K. The isolated chains of Te in these compounds are less rigid than those in elemental Te. The determined data of quadrupole splitting Δ and Debye temperature Θ$\text{}_{D}$ are indicative of strong local ordering of Te in one of the two non-equivalent crystallographic positions. It was not possible to resolve crystallographic positions by the Mössbauer spectroscopy.
Źródło:: Acta Physica Polonica A; 2001, 100, 5; 807-815
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Magnetoelastic Phase Transitions and Critical Behaviour of (Fe$\text{}_{1-x}$Ni$\text{}_{x}$)$\text{}_{2}$P System
Autorzy:: Średniawa, B.
Duraj, R.
Pacyna, A.
Bombik, A.
Zach, R.
Bacmann, M.
Fruchart, D.
Nizioł, S.
Fornal, P.
Stanek, J.
Powiązania:: https://bibliotekanauki.pl/articles/2013735.pdf
Data publikacji:: 2000-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Cc
71.20.Lp
Opis:: This report focuses on magnetoelastic properties and critical behaviour of (Fe$\text{}_{1-x}$Ni$\text{}_{x}$)$\text{}_{2}$P system. For low Ni content (x=0.01) an isolated critical point was found. Analysis of this critical behaviour in the frame of molecular field approximation was carried out. Moreover, thermal variations of the lattice parameters, as measured by X-ray diffraction techniques, were studied. The (P,T) phase diagrams obtained for several Ni contents show the evidence that the Curie temperature decreases with pressure. The Mössbauer spectra collected for x = 0.025, 0.1, 0.2, 0.25 at different temperatures are also analysed. The existence of two nonequivalent crystallographic sites occupied by iron atoms as well as local magnetic structure is discussed.
Źródło:: Acta Physica Polonica A; 2000, 97, 5; 921-925
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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