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Properties of Fe_{73.5-x}Si_{13.5}B_9Cu_1Nb_3Mn_x Alloys by Means of Mössbauer Spectroscopy

100%
Brzozowski R., Wasiak M., Balcerski J., Sovák P., Moneta M.
Acta Physica Polonica A
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2008
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vol. 113
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issue 1
127-130
EN
Fe_{73.5-x}Si_{13.5}B_9Cu_1Nb_3Mn_x (x=1, 3÷15) amorphous alloys were studied by means of Mössbauer spectroscopy, as-quenched and after annealing. The basic alloys show stronger magnetic ordering for small values of x, than for larger x. The initially amorphous phase and the final nanocrystalline structure were determined with X-ray diffraction. The alloys were shown, by scanning calorimetry, to suffer different phase transformations, when heated.
2
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Investigation of the Morphological Structure of Thin Cobalt Films by AFM and TEM

100%
Szmaja W., Balcerski J., Kozłowski W., Grobelny J., Cichomski M.
Acta Physica Polonica A
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2008
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vol. 113
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issue 1
171-174
EN
Thin obalt films, 40 nm and 100 nm in thickness, were evaporated at an incidence angle of 45° in a vacuum of about 10^{-5} mbar, simultaneously on unheated glass substrates and NaCl crystals. The magnetic microstructure of these films was investigated in a previous paper. In the present paper, to obtain an insight into relation between the magnetic microstructure and the morphological structure, we studied the latter structure with atomic force microscopy and transmission electron microscopy. For the films 40 nm as well as 100 nm thick, the presence of contribution of the shape anisotropy (related to the geometric alignment of the grains of the film) to the magnetic anisotropy of the film was found. Nevertheless, for the films investigated, we could not detect crystallographic texture.
3
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Influence of Film Thickness on the Microstructure and Magnetic Properties of Finemetic Thin Films

100%
Dlugoš R., Sovák P., Balcerski J., Füzer J., Kollár P.
Acta Physica Polonica A
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2000
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vol. 97
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issue 3
447-450
EN
The aim of this work was to study the influence of film thickness on the structure and magnetic properties of finemetic thin films after annealing. Thin films with the various thickness (from 20 nm up to 700 nm) were prepared by DC sputtering method. The heat treatments of the films for further structural and magnetic observations were performed at the temperature range 300-500°C for 15 min in vacuum furnace. Structural observations were carried out by transmission electron microscopy. Coercivity was determined from hysteresis loops traced with fluxmeter and Kerr magnetooptical hysteresisgraph. All the experimental results confirm a different magnetic behaviour of the thin films according to their thickness.
4
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Finemet Thin Films Substituted by Chromium - CEMS and MOKE Study

86%
Brzózka K., Szumiata T., Sovák P., Górka B., Hibner K., Balcerski J.
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issue 5
794-796
EN
Conversion electron Mössbauer spectroscopy and magneto-optical Kerr effect were applied to investigate hyperfine interactions and macroscopic magnetic properties of Finemet-type thin films. Phase analysis as well as compositional evolution of hyperfine parameters and coercivity was performed in the range of chromium percentage 0 ≤ x ≤ 14. Essential differences in structure and hyperfine parameters were found for films of different chromium concentration. Coercivity shows non-monotonic dependence with minimal value at x = 5.
5
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Sputtering and Implantation of VV-6025X Surface with Slow Heavy Ions Monitored with PIXE

73%
Antoszewska M., Balcerski J., Brzozowski R., Dolecki K., Frątczak E., Gwizdałła T., Pawłowski B., Moneta M.
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vol. 126
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issue 1
136-137
EN
In this work the characteristic radiation, emitted during interaction of medium energy (200 keV) ambient heavy ions (Ar) with Fe_{4}Co_{66}Si_{12}B_{14}Nb_{1}Mo_{2}Cu_{1} (VV-6025X) amorphous alloy, was measured in grazing incident-exit angle geometry and in time sequence, in order to determine dynamics of formation of subsurface region, damaged through implantation, sputtering and interface mixing. It was shown that structure and composition of surface is unstable against heavy ions irradiation due to preferential sputtering and implantation of ions, and recoils, and that the dynamics of such modification can be monitored in-situ with particle induced X-ray emission (PIXE) method.
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