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1
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The Improvement of Atomic Force Microscope Suitable for Magnetic Domain Structure Measurements

100%
Sveklo I., Dobrogowski W., Kisielewski M., Maziewski A.
Acta Physica Polonica A
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2000
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vol. 97
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issue 3
527-530
EN
Based on commercial Burleigh METRIS^{TM}-2000 Atomic Force Microscope two methods of magnetic force measurements were realised. The developed system was successfully applied for study of magnetic structure of both YIG-garnet and CoNi/Pt magneto-optic multilayers.
2
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Three-Dimensional Micromagnetic Simulation of Spatial Distribution of Magnetization in Thick Cobalt Layers

100%
Kisielewski M., Maziewski A., Zablotskii V.
Acta Physica Polonica A
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2015
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vol. 127
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issue 2
520-522
EN
Spatial magnetization distribution of cobalt layer is studied by means of three-dimensional micromagnetic simulations in the range of cobalt thickness d from 21 to 249 nm. In this range, a spin-reorientation phase transition occurs, while the cobalt thickness increases, from a state with in-plane magnetization, to a state with out-of-plane components of magnetization. An infinite cobalt layer is modelled by the 750 nm × 750 nm × d structure consisting of cubic cells of size of 3 nm and the periodic boundary conditions. For larger thicknesses, a labyrinth, partially closed, stripe structure has been found.
3
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Magneto-Optical Study of NiFe/Au/Co/Au Layers

76%
Mazalski P., Postava K., Tekielak M., Maziewski A., Urbaniak M., Szymański B., Stobiecki F.
Acta Physica Polonica A
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2009
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vol. 115
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issue 1
369-371
EN
Sputtered NiFe/Au/Co/Au layers with noncollinear magnetizations are of scientific interest for unusual magnetization behavior and their potential application in spintronics. In this paper, we propose to use a material selective sensitivity of magneto-optical Kerr effect for separation of signals from different materials in a bilayer system. The materials selective sensitivity is demonstrated on a sample with two mutually perpendicular Co and NiFe wedges.
4
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Buffer Induced Magnetic Patterning of Ultrathin Co Layer

76%
Wawro A., Petroutchik A., Kurant Z., Baczewski L., Mazalski P., Maziewski A.
Acta Physica Polonica A
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2009
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vol. 115
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issue 1
306-308
EN
The possibility of magnetic anisotropy engineering of ultrathin Co films in the scale of several dozen nanometers is investigated by magnetooptical magnetometry. In Au/Co/Au sandwiches the spin reorientation transition from the out-of-plane to the in-plane configuration is observed, when Co layer thickness exceeds 1.9 nm. Molybdenum as the underlayer suppresses the Co thickness range for which the perpendicular magnetization is stable. The application of patterned buffer in the form of Au islands grown on Mo layer for ultrathin Co film gives rise to the array of spatially stable magnetic dots fabrication ca. 100 nm in lateral size with magnetization perpendicular to the film plane surrounded by the area magnetized in the sample plane.
5
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Brillouin Light Scattering Investigations οf Magnetic and Elastic Properties in MBE Grown Trilayer Mo/Co/Au Systems

64%
Gieniusz R., Błachowicz T., Maziewski A., Petroutchik A., Baczewski L., Wawro A., Hamrle J., Serga O., Hillebrands B.
Acta Physica Polonica A
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2009
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vol. 115
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issue 1
213-216
EN
The magnetic and elastic properties of epitaxially grown Mo/Co/Au trilayer systems were investigated by the Brillouin light scattering and a ferromagnetic resonance. Using both experimental methods the perpendicular uniaxial anisotropy and the effective in-plane twofold anisotropy contributions were determined as the function of the cobalt thicknesses. Acoustic phonons analysis shows that the elastic constants are decreased with increasing cobalt layer thicknesses.
6
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Ellipsometric Selective Sensitivity to Magnetic Nanostructures

64%
Hamrlová J., Postava K., Životský O., Hrabovský D., Pištora J., Švec P., Janičkovič D., Maziewski A.
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issue 5
837-839
EN
Recently, we have shown that the approach of depth sensitivity of magneto-optic ellipsometry can be generalized to selectivity from different materials in nanostructures. We use the condition number as the figure of merit to quantify the magneto-optic selectivity to two different magnetic contributions in magnetic nanostructure. The method is demonstrated on nanostructures containing magnetically hard Fe particles in surface layer of soft FeNbB amorphous ribbon. We separated both magnetic contributions from measurement of hysteresis loops using magneto-optic Kerr effect in longitudinal configuration. Magneto-optic selectivity is discussed and theoretical model on the basis of effective medium is compared with experimental data of longitudinal magneto-optic Kerr effect depending on angle of incidence.
7
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The Influence of He^+ Ion Bombardment on Magnetic Properties of NiFe/Au/Co/Au Multilayers

64%
Kuświk P., Szymański B., Urbaniak M., Stobiecki F., Sveklo I., Kisielewski J., Maziewski A., Jagielski J.
Acta Physica Polonica A
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2009
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vol. 115
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issue 1
352-354
EN
The influence of He^+ ion bombardment on magnetoresistance, magnetization reversal and domain structure of sputtered (Ni_{80}Fe_{20}(2 nm)/Au(2 nm)/Co(0.6 nm)/Au(2 nm))_{10} multilayers was investigated. The samples were bombarded using He^+(30 keV) ions with fluences D varied from 10^{13} to 3×10^{16} He^+/cm^{2}. With increasing D the following changes in magnetic properties were observed: (i) exponential decay of the saturation field of Co layers, (ii) progressive decrease in magnetoresistance as a result of degradation of Co layers perpendicular anisotropy, (iii) linear decrease in stripe domain period with log(D).
8
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He⁺ Ion Bombardment Induced Effects on Magnetic Properties of Ni-Fe/Au/Co/Au Films

64%
Kuświk P., Szymański B., Urbaniak M., Dubowik J., Stobiecki F., Kisielewski J., Tekielak M., Maziewski A., Weis T., Ehresmann A.
Acta Physica Polonica A
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2008
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vol. 113
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issue 2
651-656
EN
The influence of He⁺ (10 keV) ion bombardment on magnetic properties of sputter deposited Ni_{80}Fe_{20}/Au/Co/Au layered films was studied. The variable parameters were the thickness of the Co layer or Au spacer and the ion dose. The magnetooptical Kerr measurements were performed on samples with wedge shaped Co or Au layers. With increasing dose of helium ions the following changes in magnetic properties were observed: (i) a decrease in the Co thickness range corresponding to the perpendicular anisotropy, (ii) a decrease in the coercive field (H_C), (iii) an increase in the ferromagnetic coupling between ferromagnetic layers.
9
Content available remote

Modification of Magnetic Properties of Pt/Co/Pt Films by Ga^{+} Ion Irradiation: Focused versus Uniform Irradiation

52%
Sveklo I., Mazalski P., Jaworowicz J., Jamet J., Vernier N., Mougin A., Ferré J., Kisielewski M., Zablotskii V., Bourhis E., Gierak J., Postava K., Fassbender J., Kanak J., Maziewski A.
Acta Physica Polonica A
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2018
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vol. 133
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issue 5
1215-1226
EN
30 keV Ga^{+} irradiation-induced changes of magnetic and magneto-optical properties of sputtered Pt/Co/Pt ultrathin trilayers films have been studied as a function of the ion fluence. Out-of-plane magnetic anisotropy states with enhanced magneto-optical effects were evidenced for specific values of cobalt thickness and irradiation fluence. Results obtained after uniform or quasi-uniform focused ion beam irradiation on either out-of-plane or in-plane magnetized sputtered pristine trilayers are compared. Similar irradiation-induced magnetic changes are evidenced in quasi-uniformly focused ion beam or uniformly irradiated films, grown either by sputtering or molecular beam epitaxy. We discuss on plausible common mechanisms underlying the observed effects.
10
Content available remote

Magnetic Tailoring of Domains in NiFe/Au/Co/Au Multilayers by He Ion Bombardment through Nanospheres

52%
Glapka W., Kuświk P., Sveklo I., Urbaniak M., Jóźwiak K., Weis T., Engel D., Ehresmann A., Błaszyk M., Szymański B., Maziewski A., Stobiecki F.
Acta Physica Polonica A
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2009
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vol. 115
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issue 1
348-351
EN
Sputter deposited (Ni_{80}Fe_{20}/Au/Co/Au)_{10} multilayers, characterized by alternating in-plane and perpendicular anisotropies of the NiFe and Co layers, respectively, and out-of-plane stripe (labyrinth) domain structure in the Co layers, were bombarded by He^+-ions (10 keV) through a mask consisting of polystyrene nanospheres with a diameter of 470 nm. The changes of multilayers magnetic properties after ion bombardment are correlated with the used mask structure.
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