Autor: Sovak, P. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Some Magnetic Properties of Thin Films Prepared from Fe-(M-NO-Si-B (M=Cu, Ag, Pt, Pd) Alloys
Autorzy:: Gościańska, I.
Ratajczak, H.
Sovák, P.
Konć, M.
Matta, P.
Tematy:: 75.50.Kj
75.70.-i
81.40.-z; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1930604.pdf Link otwiera się w nowym oknie
Opis:: Saturation magnetic induction, B$\text{}_{s}$, and coercive field, H$\text{}_{c}$, have been studied upon annealing in films flash evaporated from Fe$\text{}_{73.5}$M$\text{}_{1}$Nb$\text{}_{3}$Si$\text{}_{13.5}$B$\text{}_{8}$ alloys. The changes in B$\text{}_{s}$ significantly diverged at increasing annealing temperature, T$\text{}_{a}$, and did not indicate any formation of ultrafine grain phase in the films. H$\text{}_{c}$ measured as an angular function in the plane of the films revealed oscillations due to weak in-plane anisotropy. The coercivity increased in the course of annealing at increasing T$\text{}_{a}$, while the in-plane anisotropy decreased at the same time.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Influence of Annealing Treatment on the Structure and Magnetic Properties of Fe-Al-Cu-Nb-Si-B Alloys
Autorzy:: Pavlík, G.
Matta, P.
Sovák, P.
Zorkovská, A.
Konč, M.
Tematy:: 61.16.Bg
75.50.Kj
75.80.+q
81.40.Rs; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2013354.pdf Link otwiera się w nowym oknie
Opis:: In this paper we present experimental results on influence of Al content on the structure and saturation magnetostriction of Fe-Al-Cu-Nb-Si-B alloys after heat treatment. Transmission electron microscopy observations confirmed the existence of nanocrystalline structure after annealing at 490°C and 550°C for all samples. The crystallization temperature of FeSi phase and the temperature at which the polycrystalline transformation starts were determined from temperature dependence of electrical resistivity. Aluminium slightly decreases the first crystallization temperature and considerably decreases the saturation magnetostriction in as-quenched state.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Structure and Magnetic Properties οf Fe(Mn)-Si-B-Nb-Cu Alloys
Autorzy:: Michalik, S.
Sovak, P.
Bednarcik, J.
Kollar, P.
Girman, V.
Tematy:: 61.05.cp
75.50.Tt
77.80.Bh; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1810612.pdf Link otwiera się w nowym oknie
Opis:: According to high energy X-ray diffraction measurements no significant changes were observed in a short range atomic order of amorphous ribbons $Fe_{73.5-x}Mn_xCu_1Nb_3Si_{13.5}B_9$ (x=1 up to 15 at.%). Thermal stability of the as-prepared alloys was investigated by differential scanning calorimetry and by in situ X-ray diffraction measurements. The two-step crystallization process was revealed, crystallization temperatures $T_{x1}$ and $T_{x2}$ were influenced by Mn content (thermal separation between $T_{x1}$ and $T_{x2}$ completely vanished for x=9). Nanocrystalline state of annealed samples was confirmed by electron transmission microscopy. The influence of Mn substitution on magnetic properties was confirmed by thermomagnetic measurements.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: Mössbauer Study of Magnetic Texture of Finemet-Type Ribbons
Autorzy:: Brzózka, K.
Sovák, P.
Górka, B.
Szumiata, T.
Gawroński, M.
Tematy:: 76.80.+y
75.50.Kj
81.40.Ef; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1506573.pdf Link otwiera się w nowym oknie
Opis:: Magnetic texture of amorphous Finemet-type alloys substituted by Co, Ni, Mn, Ge and V was investigated by means of Mössbauer spectroscopy using various angular configurations. Samples in form of ribbons were manufactured by single-roller melt spinning technique. In most of investigated alloys some preference of alignment of atomic magnetic moments in-plane of sample is stated, except of some alloys substituted by germanium in which slight tendency to out-of plane spin orientation is proved.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Properties of $Fe_{73.5-x}Si_{13.5}B_9Cu_1Nb_3Mn_x$ Alloys by Means of Mössbauer Spectroscopy
Autorzy:: Brzozowski, R.
Wasiak, M.
Balcerski, J.
Sovák, P.
Moneta, M.
Tematy:: 75.50.Bb
75.50.Ww
75.60.Ej; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1813582.pdf Link otwiera się w nowym oknie
Opis:: $Fe_{73.5-x}Si_{13.5}B_9Cu_1Nb_3Mn_x$ (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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Influence of Film Thickness on the Microstructure and Magnetic Properties of Finemetic Thin Films
Autorzy:: Dlugoš, R.
Sovák, P.
Balcerski, J.
Füzer, J.
Kollár, P.
Tematy:: 68.55.Jk
73.50.Jt
75.70.Ak; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2013050.pdf Link otwiera się w nowym oknie
Opis:: 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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: The Structural Stability of Soft Magnetic Fe-Co-Zr-W-B Metallic Glasses Investigated by the in-situ X-ray Diffraction
Autorzy:: Michalik, S.
Bednarcik, J.
Pawlik, P.
Matija, R.
Sovak, P.
Tematy:: 61.05.cp
61.43.Dq; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1366893.pdf Link otwiera się w nowym oknie
Opis:: The atomic structure of as-prepared $Fe_{61}Co_{(14-x)}Zr_{5}W_{x}B_{20}$ (x=1, 2 and 4) ribbon samples and their thermal stability were investigated by in-situ high-energy X-ray diffraction experiments. It was observed that higher W concentration causes the tiny shift of the main peak of the reduced atomic pair distribution function to higher values of interatomic distances and increases the coefficient of volume thermal expansion. The crystallization process occurs in two steps and is qualitatively the same for all studied specimens. Firstly the $Fe_{23}B_{6}$ phase is created and later is transformed to other types of borides together with the creation of a Fe-based phase.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Effects of Heavy-Ions on Soft-Magnetic Metallic Glasses Studied by Diffraction of Synchrotron Radiation
Autorzy:: Michalik, S.
Pavlovic, M.
Gamcova, J.
Sovak, P.
Miglierini, M.
Tematy:: 61.05.cp
75.50.Lk
61.43.Dq; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1032682.pdf Link otwiera się w nowym oknie
Opis:: In this work, influence of ²³⁸U swift (5.9 MeV/u) heavy ions on the as-prepared Fe-Cu-Nb-Si-B metallic glass was investigated by in situ temperature X-ray diffraction of synchrotron radiation. It was observed that ion irradiation strongly affected the temperature evolution of the parameters of the first diffuse peak. It is hypothesized that ion irradiation induced structural rearrangement that increased the degree of disorder of the amorphous structure. During heat treatment, structural relaxation and annealing out of this ion-induced degradation took place. Consequently, the original structure was recovered as demonstrated by the behaviour of the first diffuse peak broadening and devitrification process.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Phase Composition and Magnetic Properties of Nanoperm Thin Films Doped with Yttrium
Autorzy:: Brzózka, K.
Sovák, P.
Szumiata, T.
Górka, B.
Gawroński, M.
Tematy:: 75.50.Bb
75.70.-i
76.80.+y
78.20.Ls; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1428972.pdf Link otwiera się w nowym oknie
Opis:: Thin films of Nanoperm alloys with partial substitution of iron by yttrium are the subject of investigations. The attention is fixed on the influence of yttrium substitution on structure and magnetic characteristics of the samples. The effect of film thickness is also considered. Conversion electron Mössbauer spectroscopy and magneto-optic Kerr effect were used to derive hyperfine parameters and coercive field, respectively. Coexistence of crystalline bcc-Fe phase and an amorphous one with diverse proportion was stated in most of the samples. It was found that surface and interface regions contribute to the magnetic properties of films.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Microstructural Study of Fe-Si(Ge)-Nb-Cu-B Finemet Alloys
Autorzy:: Michalik, S.
Bednarcik, J.
Brzózka, K.
Sovak, P.
Górka, B.
Tematy:: 61.05.cp
61.05.C-
61.46.Hk; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1534048.pdf Link otwiera się w nowym oknie
Opis:: Structural changes in Finemet based alloys invoked by germanium replacement for silicon were investigated using the X-ray diffraction, the X-ray absorption spectroscopy and the Mössbauer spectroscopy. Ge substitution preserves a nanostructural character of annealed samples at temperature 550°C; specifically the formation of a $DO_3$-type with about 19 at.% of (Si,Ge) was confirmed. The mean size of nanocrystals was estimated to be about 7 nm.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "Sovak, P." wg kryterium: Autor