Anatoly B. BEZNOSOV Senior Researcher   E-mail: beznosov@ilt.kharkov.ua    Tel: +38-057-3308503; Fax: +38-057-3335593;   Graduated from Kharkov State University in 1967 PhD Phys & Math, Kharkov State University, 1979 Academic rank: Senior Researcher (Physics of magnetic phenomena), 1989 Permanent staff of ILTP&E since 1977

 

Research area

Theoretical and Experimental Study of the Electronic Structure and Properties of the Narrow Band Magnets and Superconductors.

Selected recent results:

1) A model of conductivity of the narrow band magnetic conductor describing the «colossal magnetoresistance effect» in manganese oxides was developed. The model parameters dependent on the magnetization are the activation energy, the effective mass and transport relaxation time of the charge carriers [A. B. Beznosov et al., Low Temp. Phys., 28, 556-561 (2002)].

2) Three magnetic phase transitions below the Curie point and the electronic phase transition coinciding with the structural phase transition of martensitic type have been revealed and studied in the La_2/3Ba_1/3MnO₃ perovskite manganite
[A. B. Beznosov et al., Phys. Rev., B68, 054109 1-054109 11 (2003)].

3) Magnon characteristics, amplitudes of the spin-phonon interaction, magneto-dipole oscillator forces, and the ferromagnetic ordering temperature are calculated for the half metal system [A. B. Beznosov and E. S. Orel, Low Temp. Phys., 30, 721-728, 790-798 (2004)].

Publications: total over 200 scientific publications.

Selected publications:

1) A. B. Beznosov and G. S. Nikol'skii, Electron interactions and the crystalline lattice of rare earth metals, Sov. J. Low Temp. Phys., 2, 652-658 (1976).

2) A. B. Beznosov, G. S. Nikolskii, and A. Feher, Band structure, high temperature electrical resistivity, and exchange-induced magnetic moment of the itinerant electrons in Gd-La alloys, Phys. Stat. Sol., 111B, 89-93 (1982).

3) A. B. Beznosov, V. P. Gnezdilov, and V. V. Eremenko, d-f-Exchange resonance and "j-polaron" in the metallic gadolinium, Pis'ma v ZhETF (JETP Letters), 38, 486-488 (1983); Coherent interaction of light with atomic dipole moments in single-crystalline gadolinium, Sov. J. Low Temp. Phys., 10, 498-505 (1984).

4) A. B. Beznosov, V. V. Eremenko, and V. P. Gnezdilov, d-f-Exchange resonance in gadolinium: theory and experiment, J. Magn. Magn. Mater., 43, 243-248 (1984); Effect of magnetic ordering on anisotropy of dynamic conductivity of gadolinium single crystals, J. Magn. Magn. Mater., 54-57, 1251-1252 (1986).

5) A. B. Beznosov, V. V. Eremenko, A. S. Cherny, and P. Diko, Magnetic-Field-Enhanced Diamagnetic Response of Superconducting U₆Fe, In:"Physics of Transition Metals. International Conference.Proceedings", Part I. Kiev, Naukova Dumka, 1989. P.54-57.

6) A. B. Beznosov, E. L. Fertman, and P. P. Pal-Val, Curious magnetic phase transition in polycrystalline Gd-Y alloys: ultraacoustic study, J. Magn. Magn. Mater., 92, 111-115 (1999).

7) A. B. Beznosov, E. L. Fertman, V. V. Eremenko, and V. A. Desnenko, Electronic Structure and Magnetostrictive Sensitivity of Fe-B Metallic Glasses, Low Temp. Phys. 27, 316-319 (2001).

8) A. B. Beznosov, B. I. Belevtsev, E. L. Fertman, V. A. Desnenko, D. G. Naugle, K. D. D. Rathnayaka, and
A. Parasiris, Exchange interaction and magnetoresistance in La_2/3Ca_1/3MnO₃: experiment and models, Low Temp. Phys., 28, 556-561 (2002).

9) A. B. Beznosov, V. A. Desnenko, E. L. Fertman, C. Ritter, and D. D. Khalyavin, Magnetic and neutron diffraction study of La_2/3Ba_1/3MnO₃ perovskite manganite, Phys. Rev., B68, 054109 1-054109 11 (2003).

10) A. B. Beznosov and E. S. Orel, Spectrum of dynamic magnetic susceptibility of a randomized f–d magnet with spin–lattice coupling. I. Shift of the magnetic resonance frequencies, Low Temp. Phys., 30, 721-728 (2004); II. "Opening" of the spin excitation bands, Ibid., 30, 790-798 (2004).

Academic Supervision:

Defended CSc (PhD, Phys&Math) dissertations:

1) Vladimir P. Gnezdilov,Optical properties of gadolinium and its alloys: relation to the electronic structure and magnetic order (1984, with co-supervision of V. V. Eremenko).

2) Vladimir A. Ushakov, Optical properties of magnetoconcentrated compounds of d- and f- elements: role of the narrow electron bands (1993, with co-supervision of V. V. Eremenko).

3) Elena L. Fertman, Electronic structure and magnetic properties of metallic systems based on d- and f- elements (1999).

International scientific co-operation

Constructive contacts are established with researches of the following foreign scientific centers: IEP SAS, Kosice (Slovakia), IP CAS, Prague (Czech Republic), IMP PAS, Poznan (Poland), IP AMU, Poznan (Poland), ILTPSR PAS, Wrozlaw (Poland), IMP UD RAS, Ekaterinburg (Russia), IPSS BAS, Minsk (Belarus), ILL CNRS, Grenoble (France), PSI, Villigen (Switzerland), University of Antwerpen, (Belgium).