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Studies of pressure
effects on magnetic properties
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Staff of Research Group
The main fields of study
Study of pressure effect on the magnetic properties
of metals, alloys and intermetallic compounds.
Some main results
Experimentally there was observed
the general trend for increase of the exchange-correlation coupling between
the conduction electrons in metals with decreasing of the atomic volume.
A large magnitude of the magnetovolume
effect was observed in Ce and Yb based compounds in the intermediate valence
state in the vicinity of a half-integer valence values.
Experimental equipment allows to study:
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The temperature dependence of the magnetic susceptibility
in the range 4,2 – 300 K in magnetic field up to 1 T by a Faraday method
with a sensitivity of about 10-9
emu.
A range of the measured values of susceptibility is about
(1–1000)õ10-6
emu/g and the accuracy is not worse then 0,2 %.
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The effect of helium gas pressure up to 2 kbar on the magnetic
susceptibility in the temperature range 20,3–300 K by a levitation method
based on the principle of a free suspension of the sample in strong and
non-uniform magnetic field. The relative errors are about 0,03 %.
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Another device for the pressure effect study is a pendulum
type magnetometer placed directly into the pressure cell, which has the
similar technical characteristics.
Main publications of last years
G. E. Grechnev, A. S. Panfilov, I. V. Svechkarev, A. Czopnik,
W. Suski, A. Hackemer. Effect of pressure on the magnetic susceptibility
of CeIn3xSnx alloys. J. Phys. Cond. Matter
9,
6921 (1997).
I. V. Svechkarev, A. S. Panfilov, S. N. Dolya, H. Nakamura,
M. Shiga, Pressure effect on the magnetic susceptibility of the YbInCu4
and GdInCu4 compounds. Itinerant Electron Magnetism: Fluctuation
Effect, D. Wagner et al. (eds.), Kluwer Academic Publishers, Netherlands,
1998, p. 309-321.
A. S. Panfilov, Yu. Ya. Pushkar, Experimental techniques
for study of the magnetic susceptibility of solids as a function of the
atomic volume. Physics and Techniques of High Pressures, 8, N3,
5 (1998) (in Russian).
I. V. Svechkarev, A. S. Panfilov, S. N. Dolya, H. Nakamura,
M. Shiga, Effect of pressure on magnetic susceptibility in YbInCu4.
J. Magn. Magn. Mater., 196-197, 893 (1999).
A. S. Panfilov, I. V. Svechkarev, P. Diko, M. Mihalik,
A. Zentko, Effect of alloying and pressure on magnetic properties of itinerant
intermetallic compound UFe2. ÔÍÒ, 25, N 8, 910 (1999).
A. S. Panfilov, Effect of pressure on magnetic properties
of the compound MnSi. Low Temp. Physics, 25, N 6, 432 (1999).
A.S. Panfilov, G.E. Grechnev, I.V. Svechkarev, H. Sugawara,
H. Sato, O. Eriksson, Effect of pressure on the magnetic susceptibility
of CeCo2. Physica B 319, 268 (2002).
A. S. Panfilov, Yu. Ya. Pushkar’, Measurements of the
density of liquids and gases under pressure using magnetic levitation of
a standard sample. Low Temp. Physics, 28, N 10, 789 (2002).
G. E. Grechnev, A. S. Panfilov, I. V. Svechkarev, A. Czopnik,
A. Hackemer, D. Kaczorowski, O. Eriksson. Pressure effect on magnetic properties
of UX3 (X =
Al, Ga, In, Si, Ge) compounds. Czechoslovak Journal of Physics 54,
359 (2004).
A. E. Baranovskiy, G. E. Grechnev, A. S. Panfilov, I.
V. Svechkarev, A. Czopnik, A. Hackemer, M. Solyga, Pressure effects on
magnetic properties and electronic structure of GdIn3xSnx
alloys. Czechoslovak Journal of Physics 54, 351 (2004).
G.E. Grechnev, A.E. Baranovskiy, A.V. Logosha, A.S. Panfilov, V.D. Fil,
T.V. Ignatova, N.Yu. Shitsevalova, O. Eriksson. Pressure effect on electronic
structure and magnetic properties of MB6 and MB12
borides. High Pressure Physics and Technology, 16, N4, 110-114 (2006).
M. Mihalik, V. Kavecansky, A.S. Panfilov, K. Wochowski, R. Troc. Effect
of alloying and pressure on magnetic properties of (U 1-xThx)3Al2M3
(M=Si and Ge). Journal of Alloys and Compounds, 421, N1, 8-11 (2006).
B.I. Belevtsev, G.A. Zvyagina, K.R. Zhekov, I.G. Kolobov, E.Yu. Beliayev,
A.S. Panfilov, N.N. Galtsov, A.I. Prokhvatilov, J. Fink-Finowicki. Influence
of magnetic field on paramagnetic-ferromagnetic transition in La1-xCaxMnO3
(x~0.25) crystal: ultrasonic and transport studies. Physical Review B,
74,
N5, 054427-1-054427-1 (2006).
B.I. Belevtsev, G.A. Zvyagina, K.R. Zhekov, I.G. Kolobov, E.Yu. Beliayev,
A.S. Panfilov, N.N. Galtsov, A.I. Prokhvatilov, J. Fink-Finowicki. Influence
of magnetic field on paramagnetic-ferromagnetic transition in La1-xCaxMnO3
(x~0.25) crystal: ultrasonic and transport studies. Los-Alamos e-print,USA,
arXiv:Cond-mat/0607761.
V.V. Eremenko, V.A. Sirenko Intrinsically inhomogeneous magnetic states
in antiferromagnets. NATO Science Series II: Mathematics, Physics and Chemistry.
V. 226, 67-99 (2006).
A. E. Baranovskiy, G. E. Grechnev, V. D. Fil, T. V. Ignatova, A. V.
Logosha, A. S. Panfilov, I. V. Svechkarev, N. Y. Shitsevalova, V. B. Filippov,
O. Eriksson. Electronic structure, bulk and magnetic properties of MB6
and
MB12 borides. Journal of Alloys and Compounds, 442, N2,
228-230 (2007).
G.E. Grechnev, A.V. Logosha, A.S. Panfilov, I.V. Svechkarev, O. Musil,
P. Svoboda. Magnetovolume effect in Ce(Ni1-xCux)5
alloys.Hiigh
Pressure Physics and Technology, 17, N 1, 59-66 (2007).
International cooperation
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Kyoto University (Department of Material Science and Engineering), Japan
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Florida State University (Department of Physics), USA
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Institute of Experimental Physics, Kosice, Slovak Republic
Brief information
