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Wyszukujesz frazę "Gošciańska, I." wg kryterium: Autor


Wyświetlanie 1-14 z 14
Tytuł:
Inverse Spin Hall Effect by Spin-Pumping in $Co_2Cr_{0.4}Fe_{0.6}Al$/Pt Structures
Autorzy:
Gościańska, I.
Dubowik, J.
Powiązania:
https://bibliotekanauki.pl/articles/1534160.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.25.Rb
75.47.-m
76.50.+g
Opis:
Inverse spin Hall effect consists in conversion of spin currents into electric currents and has recently been observed using spin-pumping operated by ferromagnetic resonance in permalloy/Pt(Cr) thin film structures. We prepared several $Co_2Cr_{0.4}Fe_{0.6}Al$/Pt thin film structures to observe for the first time inverse spin Hall effect in bilayer structures comprising ferromagnetic half-metallic Heusler alloy. In but a few $Co_2Cr_{0.4}Fe_{0.6}Al$/Pt samples we succeeded in observing inverse spin Hall effect voltage of few microvolts by spin pumping resulting from ferromagnetic resonance. This confirms that spin polarized current can be transferred into Pt layer. Inverse spin Hall effect was 2-3 times larger than that detected in permalloy/Pt bilayer under the same conditions.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 851-853
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ferromagnetic Resonance in Metallic Thin Films and Thin-Film Tubes
Autorzy:
Dubowik, J.
Gościańska, I.
Powiązania:
https://bibliotekanauki.pl/articles/1813601.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.-i
75.30.Gw
76.50.+g
Opis:
A model describing ferromagnetic resonance in thin-film magnetic metallic tubes is proposed and compared with the experimental ferromagnetic resonance spectra of the thin-film Ni.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 179-182
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Micromagnetic Approach to Exchange Bias
Autorzy:
Dubowik, J.
Gościańska, I.
Powiązania:
https://bibliotekanauki.pl/articles/1383956.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
75.30.Et
75.60.Jk
Opis:
We present a micromagnetic approach to the exchange bias in ferromagnetic/antiferromagnetic thin film systems with a small number of irreversible interfacial magnetic moments. We express the exchange bias field $H_{EB}$ in terms of the fundamental micromagnetic length scale of ferromagnetic - the exchange length $l_{ex}$. The benefit from this approach is a better separation of the factor related to the ferromagnetic layer from the factor related to the ferromagnetic/antiferromagnetic coupling at interfaces. Using this approach we estimate the upper limit of $H_{EB}$ in real ferromagnetic/antiferromagnetic systems.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 147-152
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Martensitic Transformations and Magnetic Properties of Ni-Mn-Sn Heusler Alloy Films
Autorzy:
Dubowik, J.
Szlaferek, A.
Gościańska, I.
Powiązania:
https://bibliotekanauki.pl/articles/1813595.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Cc
81.30.Kf
76.50.+g
Opis:
We report on structural and magnetic properties of $Ni_{50}Mn_{50-x}Sn_x$ (x=12÷14) films and compare them with those of the bulk Ni-Mn-Sn alloys. Magnetic measurements reveal clear presence of martensitic transformation in bulk alloys but in the flash-evaporated Ni-Mn-Sn thin films martensitic transformation is usually less visible. The best film samples annealed for 1 h at about 900 K exhibit clear signs of martensitic transformation: i.e., a small defect in magnetization and a substantial increase in ferromagnetic resonance line width.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 163-168
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of Thin Films of Fe-Cu-R-Si-B Alloys with R = Nd, Gd, Ho, Y
Autorzy:
Gościańska, I.
Ratajczak, H.
Urbaniak, M.
Konč, M.
Powiązania:
https://bibliotekanauki.pl/articles/1953190.pdf
Data publikacji:
1997-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.55.-a
75.70.-i
Opis:
Hysteresis loops of thin films of Fe$\text{}_{73.5}$Cu$\text{}_{1}$R$\text{}_{3}$Si$\text{}_{13.5}$B$\text{}_{9}$ (R = Nd, Gd, Ho, Y) alloys were studied by the magnetooptical Faraday method. The films were deposited by flash evaporation technique onto cooled glass substrates. Lanthanides were chosen as substitutes for niobium in the FINEMET type alloys. Coercivity, H$\text{}_{c}$, was determined from the easy- and hard-axis hysteresis loops. The as-deposited films containing Gd and Ho are characterized by rather low values of H$\text{}_{c}$ while the films with Nd and Y show a high isotropic value of H$\text{}_{c}$. Attempts were made to determine the conditions of the film annealing which would ensure the optimum soft magnetic properties of the films studied.
Źródło:
Acta Physica Polonica A; 1997, 91, 1; 237-240
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Dependence of Magnetization Damping in Heusler Alloy Films
Autorzy:
Dubowik, J.
Załęski, M.
Głowiński, H.
Gościańska, I.
Powiązania:
https://bibliotekanauki.pl/articles/1534143.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.50.+g
75.70.Ak
75.78.Jp
Opis:
The Gilbert damping for $Co_2CrAl (Co_2Cr_{0.3}Fe_{0.7}Al)$ and $Ni_2MnSn$ Heusler alloy films was investigated as a function of temperature. The best films reveals the Gilbert damping nearly independent of temperature. Magnetic relaxation in $Co_2CrAl$ is strongly influenced by magnetic inhomogeneities due to phase separation. The best $Ni_2MnSn$ epitaxial films have comparable Gilbert damping α of 6× $10^{-3}$ as half-metallic $Co_2Cr_{0.3}Fe_{0.7}Al$ films with α = 3 × $10^{-3}$.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 848-850
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Exchange and Rotatable Anisotropies in Co₂FeSi/IrMn Exchange Coupled Structures using Broadband Ferromagnetic Resonance
Autorzy:
Głowiński, H.
Schmidt, M.
Krysztofik, A.
Gościańska, I.
Dubowik, J.
Powiązania:
https://bibliotekanauki.pl/articles/1386989.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
75.30.Et
75.60.Jk
Opis:
We determined exchange $H_{ex}$ and rotatable $H_{rot}$ anisotropy fields of multilayers that comprise 10 nm Co₂FeSi (CFS) layers exchange coupled to 20 nm IrMn layers by using ferromagnetic resonance with a vector network analyzer (VNA-FMR). The multilayer structures consist of IrMn/bottom (b)-CFS/IrMn/middle (m)-CFS/IrMn/top (t)-CFS/IrMn layers so that each CFS layer is surrounded by a pair of IrMn layers. In the structures, the exchange bias field propagates in such a way that $H_{ex}^{t}$ > $H_{ex}^{m}$ > $H_{ex}^{b}$ for the top, middle, and bottom layer, respectively. FMR response measured along the exchange bias (EB) axis consist of only two absorptions related to the (b+m)- and (t)-CFS layers, respectively. Exchange and rotatable anisotropy determined independently from angular and dispersion measurements of the resonance fields are nearly the same. Rotatable anisotropy field scales with the exchange bias field in these complex structures.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 531-533
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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.
Powiązania:
https://bibliotekanauki.pl/articles/1930604.pdf
Data publikacji:
1994-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.70.-i
81.40.-z
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.
Źródło:
Acta Physica Polonica A; 1994, 85, 2; 423-426
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exchange Bias in Ni-Mn-Sn Heusler Alloy Films
Autorzy:
Gościańska, I.
Załęski, K.
Głowiński, H.
Kudryavtsev, Yu.
Dubowik, J.
Powiązania:
https://bibliotekanauki.pl/articles/1427549.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Ak
75.30.Et
Opis:
We report a relatively large exchange bias effect observed for the first time in Ni-Mn-Sn thin films with different microstructure and composition: a $Ni_{50}Mn_{36}Sn_{14}$ epitaxial film (A), a $Ni_{50}Mn_{43}Sn_7$ film which is phase decomposed (B), and a $NiMn//Ni_{50}Mn_{25}Sn_{25}$ bilayer (C). Despite the samples differ markedly in both microstructure and composition $H_{EB}$ does not substantially differs at 5 K. Exchange bias decreases with increasing T approximately as $H_{EB}$ (T) ∝ $H_{EB}$ (5K)/T with $H_{EB}$ (5K) of 180 Oe and 60 Oe for sample B and C, respectively and almost linearly for sample A with $H_{EB}$ (5K) = 65 Oe. Blocking temperature where the exchange bias vanishes is 40, 50 and 80 K for sample A, C and B, respectively. The results suggest that the role of AFM/FM interfaces is not substantial in formation of exchange bias in Ni-Mn-Sn Heusler alloy films and exchange bias is rather related to AFM/FM interactions in nanoscale.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1179-1181
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical Resistance Anomalies in Holmium Thin Films below 20 K in Magnetic Field
Autorzy:
Dudáš, J.
Gabáni, S.
Kavečanský, V.
Gościańska, I.
Bagi, J.
Powiązania:
https://bibliotekanauki.pl/articles/1534128.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.61.At
75.70.Ak
68.55.Nq
Opis:
Electrical resistance (R) of Ho thin films evaporated in vacuum ≈ $10^{-7}$ Pa was studied in a temperature range from 2 K up to 300 K and in magnetic field up to 9 T. Measurements showed resistance anomalies below 20 K - minima of R value in 36 nm and 215 nm thin films and resistivity maximum at 3.58 K in 215 nm Ho film. Increasing value of the magnetic field, applied perpendicular to film surface up to 5 T, caused increasing suppression of the R minima in these films with subsequent disappearance of them in fields above 5 T. Maximum of R value in 215 nm thin film at 3.58 K decreased with increasing flux density up to 5 T and it was suppressed at fields above 5 T. X-ray diffraction of these films revealed two phases composition consisting of the hexagonal Ho and of cubic $HoH_2$. The preferential crystal orientation of both phases was detected.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 843-845
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anisotropy Distribution in NiFe/Au/Co/Au Multilayers
Autorzy:
Dubowik, J.
Stobiecki, F.
Gościańska, I.
Kociemba, M.
Bednarski, W.
Powiązania:
https://bibliotekanauki.pl/articles/1810556.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.21.Ac
75.30.Gw
76.50.+g
Opis:
We present results of FMR investigations of anisotropy distribution in uncoupled $[NiFe/Au/Co/Au]_N$ structures with alternating in-plane (NiFe) and out-of-plane anisotropies (Co). It is concluded that for NiFe layers anisotropy distribution is negligible and can be increased by "dusting" of NiFe with ultrathin Co layers. The perpendicular anisotropy $K_{U}^2$ of Co layers depends on Co thickness in a standard way ∝ 1/$d_{Co}$, and is distributed in a range of ≈10-20% of $K_{U}^2$ (i.e., ≈ 1.5× $10^6$ erg/$cm^3$).
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 315-318
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric and Magnetic Signatures of Structural and Chemical Ordering of Heusler Alloy Films
Autorzy:
Dubowik, J.
Gościańska, I.
Załęski, K.
Kudryavtsev, Y.
Lee, Y.
Powiązania:
https://bibliotekanauki.pl/articles/1810587.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.80.Ng
73.61.-r
75.70.-i
76.50.+g
Opis:
We present results of in situ temperature measurements of resistivity for some amorphous or partially crystalline Heusler alloy films: $Co_{2}CrAl$, $Co_{2}MnGa$ and off-stoichiometric $Ni_{2}Mn_{1+x}Sn_{x}$, $Ni_{2}Mn_{1-x}Ga_{x}$ that are known to exhibit half-metallic properties and martensitic transformations, respectively. From ρ vs. T characteristics we distinguish various stages of chemical and structural ordering in the films. They appear to be quite distinct in both systems investigated. The resistivity results are compared with magnetic characteristics for $Co_{2}MnGa$ with a high Curie temperature.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 360-362
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of Iron-Based Amorphous and Nanocrystalline Fe-Zr-X-B (X: Cu, Al) Alloy Films
Autorzy:
Gościańska, I.
Toliński, T.
Ratajczak, H.
Sovák, P.
Dlugoš, R.
Konč, M.
Powiązania:
https://bibliotekanauki.pl/articles/2013068.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.61.Tm
75.50.Bb
Opis:
Thermal stability and magnetic properties of thin films, of a few Fe-based amorphous and nanocrystalline alloys, have been studied. The alloys belong to the class Fe-M-B, whose representatives are: Fe$\text{}_{87}$Zr$\text{}_{4}$Cu$\text{}_{1}$B$\text{}_{8}$, Fe$\text{}_{87}$Zr$\text{}_{7}$B$\text{}_{6}$, and Fe$\text{}_{87}$Zr$\text{}_{7}$Al$\text{}_{1}$B$\text{}_{5}$ and are of particular interest because of their wide variety of magnetic properties. The films were prepared by flash evaporation onto liquid nitrogen cooled substrates. Measurements of the Kerr effect, the Hall effect, and ferromagnetic resonance in the films were carried out as functions of the annealing temperature. It was found that the changes in the coercive field H$\text{}_{c}$, resonance linewidth ΔH$\text{}_{pp}$, effective magnetization M$\text{}_{eff}$, Hall parameters, and resistance were correlated with the structural changes in the studied films.
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 463-466
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Epitaxial Growths and Magnetization Dynamics of $Ni_{2}MnSn$ Heusler Alloy Films
Autorzy:
Dubowik, J.
Gościańska, I.
Załęski, K.
Głowiński, H.
Ehresmann, A.
Kakazei, G.
Bunyaev, S.
Powiązania:
https://bibliotekanauki.pl/articles/1427193.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Ak
75.50.+g
Opis:
Ferromagnetic resonance has been investigated in $Ni_{2}MnSn$ Heusler alloy films. The films were deposited at 673
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1121-1123
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-14 z 14

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