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Magnetic Properties of Thin Films of Fe-Cu-R-Si-B Alloys with R = Nd, Gd, Ho, Y

100%
Gościańska I., Ratajczak H., Urbaniak M., Konč M.
Acta Physica Polonica A
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1997
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vol. 91
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issue 1
237-240
EN
Hysteresis loops of thin films of Fe_{73.5}Cu_{1}R_{3}Si_{13.5}B_{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_{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_{c} while the films with Nd and Y show a high isotropic value of H_{c}. Attempts were made to determine the conditions of the film annealing which would ensure the optimum soft magnetic properties of the films studied.
2
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Some Magnetic Properties of Thin Films Prepared from Fe-(M-NO-Si-B (M=Cu, Ag, Pt, Pd) Alloys

88%
Gościańska I., Ratajczak H., Sovák P., Konć M., Matta P.
Acta Physica Polonica A
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1994
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vol. 85
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issue 2
423-426
EN
Saturation magnetic induction, B_{s}, and coercive field, H_{c}, have been studied upon annealing in films flash evaporated from Fe_{73.5}M_{1}Nb_{3}Si_{13.5}B_{8} alloys. The changes in B_{s} significantly diverged at increasing annealing temperature, T_{a}, and did not indicate any formation of ultrafine grain phase in the films. H_{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_{a}, while the in-plane anisotropy decreased at the same time.
3
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Magnetic Properties of Iron-Based Amorphous and Nanocrystalline Fe-Zr-X-B (X: Cu, Al) Alloy Films

76%
Gościańska I., Toliński T., Ratajczak H., Sovák P., Dlugoš R., Konč M.
Acta Physica Polonica A
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2000
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vol. 97
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issue 3
463-466
EN
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_{87}Zr_{4}Cu_{1}B_{8}, Fe_{87}Zr_{7}B_{6}, and Fe_{87}Zr_{7}Al_{1}B_{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_{c}, resonance linewidth ΔH_{pp}, effective magnetization M_{eff}, Hall parameters, and resistance were correlated with the structural changes in the studied films.
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