Autor: Svechkarev, I. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Anomalous Diamagnetism of $YbPb_3$ Compound: Pressure Effects
Autorzy:: Baranovskiy, A.
Grechnev, G.
Panfilov, A.
Svechkarev, I.
Żogał, O.
Czopnik, A.
Hackemer, A.
Powiązania:: https://bibliotekanauki.pl/articles/1813626.pdf
Data publikacji:: 2008-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.10.Lp
75.80.+q
Opis:: The effect of a uniform pressure on the magnetic susceptibility was measured for $YbPb_3$ compound, wherein a degeneracy point of the energy bands is located just below the Fermi level and responsible for the anomalous diamagnetism. Theoretical analysis of the experimental data has revealed that a pronounced increase of diamagnetism with pressure is governed by closing the degeneracy point towards the Fermi energy
Źródło:: Acta Physica Polonica A; 2008, 113, 1; 243-246
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Pressure Effect on Magnetic Properties of UGa$\text{}_{3}$
Autorzy:: Grechnev, G. E.
Delin, A.
Eriksson, O.
Johansson, B.
Panfilov, A. S.
Svechkarev, I. V.
Kaczorowski, D.
Powiązania:: https://bibliotekanauki.pl/articles/1964627.pdf
Data publikacji:: 1997-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.10.Lp
75.20.En
Opis:: The magnetic susceptibility, χ, of the itinerant antiferromagnetic compound UGa$\text{}_{3}$ was studied under pressure up to 2 kbar in the temperature range 64-300 K. The measured pressure derivative of the Néel temperature is found to be dT$\text{}_{N}$/dP=-1.1 K/kbar. In order to analyze the experimental magnetovolume effect values, d lnχ/d lnV, the volume dependent electronic structure of UGa$\text{}_{3}$ has been calculated ab initio in a paramagnetic phase by employing a relativistic full-potential linear muffin tin orbital method and including an external magnetic field self-consistently. The calculations revealed a predominance of itinerant uranium f-states at the Fermi energy, as well as a large orbital contribution to χ.
Źródło:: Acta Physica Polonica A; 1997, 92, 2; 331-333
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Exchange Coupling in GdM Compounds
Autorzy:: Buschow, K. H.J.
Grechnev, G. E.
Hjelm, A.
Kasamatsu, Y.
Panfilov, A. S.
Svechkarev, I. V.
Powiązania:: https://bibliotekanauki.pl/articles/1964560.pdf
Data publikacji:: 1997-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.20.En
75.10.Lp
Opis:: The magnetic susceptibility of ferromagnetic GdM alloys (M=Cu$\text{}_{1-x}$Ga$\text{}_{x}$, Mg, Zn) has been investigated under helium gas pressure for temperatures above T$\text{}_{C}$. The evaluated pressure derivatives of the paramagnetic Curie temperature, dlnΘ/dP, appeared to be remarkably different for isovalent GdMg and GdZn compounds (-11.2 and -0.1 Mbar$\text{}^{-1}$, respectively). An analysis of the obtained dlnΘ/dP values for GdCu$\text{}_{1-x}$Ga$\text{}_{x}$ alloys and results of ab initio electronic structure calculations have revealed the essential role of 5d electrons as the mediators of exchange coupling in ferromagnetic GdM compounds. The pressure derivatives of T$\text{}_{C}$ were calculated by employing the modern mean-field theory, as well as the spin-fluctuation model. As a result, good agreement is found with the experimental values of dlnΘ/dP.
Źródło:: Acta Physica Polonica A; 1997, 92, 2; 267-270
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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