Head of group: Dr. Sc., Julia A.Fedotova
Basic area of research:
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Nanostructured, nanocomposite materials
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Intermetallic compounds
1. J.A.Fedotova et al. Effect of grain boundaries on iron distribution in policrystalline cubic boron nitride // J.Phys. C: Cond. Matter.- 2002.- 14, ¹ 48.- p. 12855-12864.
2. J.A.Fedotova et al. Mössbauer study of iron
impurities in cubic boron nitride // J. Alloys & Comp.-
2003.- V. 352.- p. 296-303.
3. J.A.Fedotova et al. Charge states and distribution of iron ions in policrystalline cubic boron nitride // Optical materials.- 2003.- V. 23.- p. 71-77.
4.
A.M.Saad, A.V.Mazanik, Yu.E.Kalinin, J.A.Fedotova et al. Structure and
electrical properties of CoFeZr-aluminium oxide nanocomposite films // Rev.
Adv. Mater. Sci.- 2004.- V. 8.- p. 152-157.
5.
J.Fedotova et al.
Atomic arrangement in B2 FeAl prepared by
self-propagated high-temperature synthesis at varying Al content and annealing
// Hyp. Int.- 2005.- V. 159.- p. 305-311.
6.
J. Fedotova et
al. The effect of the sputtering process ambient
on the magnetic state and phase composition of the film nanocomposites
(Fe0.45Co0.45Zr0.10)x(Al2O3)1-x // Hyper. Inter.- 2005.- V. 165.- p. 127-134.
7. J.Fedotova et al. 57Fe Mössbauer
study of localization and valence state of iron ions in granular nanocomposites (FeCoZr)x(Al2O3)100-x
for spintronic applications // Proc. Int. Symp. “Industrial application of the Mössbauer
effect“ (
8. J. Fedotova et al. Phase and structural transformations in FexAl1-x
powder alloys studied by 57Fe Mössbauer
spectroscopy and XRD // Proc. Int. Symp.
“Industrial application of the Mössbauer effect“
(
9.
A.Saad, A.K.Fedotov, J.A.Fedotova et al. Characterization of (Fe0.45Co0.45Zr0.10)x(Al2O3)1-x nanocomposite films applicable as spintronic materials // Phys. Stat. Sol.- 2006.- V. C 3, ¹ 5.- 1283-1290.
10. A. Zaleski, J. Fedotova et al. Mossbauer, XRD and SEM study of FeAl-based powder alloys
with nanoinclusions // Acta Physica Polonica.- 2006.- V. A
109, ¹ 3.- p. 441-444.
1.
Principles of diamond and cubic boron
nitride (c-BN) defect structure behavior under thermobaric
treatment were obtained as the result of investigation concerning 57Fe ions
localization and charge state in composite materials based on diamond and
c-BN. It was shown that low temperature
treatment causes plastic (inelastic) deformation of composites, formation of
low-angle grain boundaries and polygonization.
Treatment temperature increase causes defect structure increase and grain
boundaries disordering. The latter could be due to intense phase formation at
the grain boundaries initiated by high temperature treatment. (State Program of
Fundamental Investigations “Crystallophysics”, State Program of applied studies “Priborostroenie”
(Instrument engineering), BRFFI project “Mossbauer Spectroscopy Investigation of iron-containing defect complexes in sfalerite boron nitride”)
2.
Influence of inert and chemically-active
additions (Argon, Hydrogen, Oxygen) on percolation transitions in nanocomposites was determined using analysis of correlation
between magnetic and electric properties on the one side and phase composition
and structure of iron-containing nanoparticles in nanostructured composite materials on the other (State
Complex Program of Applied Scientific Research “Nanotech”).
3.
Hyperfine interactions of iron ions in iron
aluminide powder alloys obtained by Self-Propagated
High-Temperature Synthesis (SHS) were investigated. Peculiarities of iron aluminides defect structure which originate from
non-equilibrium synthesis process were determined (State Complex Program of Applied
Scientific Research “Nanotech”).