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    Wyświetlanie 1-7 z 7
    Tytuł:
    Magnetization Reversal Processes in Nanocrystalline (Pr, Dy)-(Fe, Co)-B Bulk Alloys
    Autorzy:
    Przybył, A.
    Pawlik, K.
    Pawlik, P.
    Gębara, P.
    Wysłocki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1387335.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.En
    75.75.-c
    75.75.Cd
    Opis:
    The aim of this paper was to study the phase constitution, magnetic properties and magnetization reversal processes in the rapidly solidified bulk (Pr,Dy)-(Fe,Co)-B alloys doped with Zr, Ti, Mn and Ni. The 3 mm outer diameter tubes samples of the $Pr₈Dy₁Fe₆₀Co₇Ni_{(6x)}MnₓB₁₄Zr₁Ti₃$ (where x = 0, 3, 6) alloys were produced by suction-casting technique. The admixture of Zr was introduced in order to improve their glass forming abilities while Dy was substituted to enhance the magnetocrystalline anisotropy of hard magnetic phase. The effect of Ni and Mn addition on the phase constitution and magnetic properties was studied in the presented work.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 579-581
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Tungsten Addition on Phase Constitution and Magnetic Properties of the Bulk $Fe_{65}Pr_{9}B_{26-x}W_x$ Alloys
    Autorzy:
    Filipecka, K.
    Pawlik, P.
    Pawlik, K.
    Gębara, P.
    Przybył, A.
    Pruba, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402336.pdf
    Data publikacji:
    2015-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ww
    75.50.Kj
    71.20.Eh
    Opis:
    The effect of tungsten addition on phase constitution and magnetic properties of the bulk $Fe_{65}Pr_9B_{26-x}W_{x}$ (where x=2, 4, 6, 8) alloys was studied. The base alloys were prepared by arc-melting of the high purity elements under Ar atmosphere. Samples were produced by suction of an arc-molten alloy to a water-cooled copper mould (the suction-casting method). In order to develop nanocrystalline structure, the samples were subjected to annealing. Heat treatment resulted in an evolution of the phase constitution that caused changes in magnetic properties of the alloys. X-ray diffractometry was used to determine the phase composition of annealed samples. The analysis showed presence of hard magnetic $Pr_2Fe_{14}B$, paramagnetic $Pr_{1+x}Fe_4B_4$ and soft ferromagnetic α-Fe phases of annealed samples. The room temperature magnetic properties were determined from hysteresis loops measured by VSM magnetometer in the external magnetic field up to 2 T. The highest hard magnetic parameters were measured for the rod sample of $Fe_{65}Pr_9B_{20}W_6$ annealed at 1003 K for 5 min.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 1; 104-106
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase Composition and Magnetic Properties of the Nanocrystalline $Fe_{64.32}Pr_{9.6}B_{22.08}W_{4}$ Alloy
    Autorzy:
    Filipecka, K.
    Pawlik, K.
    Pawlik, P.
    Wysłocki, J.
    Gębara, P.
    Przybył, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1367656.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ww
    75.50.Kj
    71.20.Eh
    Opis:
    The aim of the present work was to study the influence of annealing conditions on magnetic properties and the phase constitution of rapidly solidified $Fe_{64.32}Pr_{9.6}B_{22.08}W_{4}$ alloy ribbons. The base alloy was prepared by arc-melting of the high purity elements under an Ar atmosphere. Subsequently the ribbon samples were obtained by melt-spinning technique under low pressure of Ar. In order to develop nanocrystalline structure, the samples were annealed at 1003 K for 5, 10, 20 and 30 min. The room temperature magnetic properties were determined from hysteresis loops measured by VSM magnetometry in the external magnetic field up to 2 T. For comparison the influence of annealing temperature on magnetic properties was studied for the same alloy composition. The ribbons were annealed at temperatures from 929 K to 1023 K for 5 min. X-ray diffractometry was used to determine the phase composition of annealed ribbons. Heat treatment resulted in an evolution of the phase constitution, that caused changes in magnetic properties of the alloy.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 164-165
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties and Phase Constitution of the Nanocrystalline $(Nd_{10}Fe_{67}B_{23})_{100-x}Nb_{x}$ (where x=1, 2, 3, 4) Alloy Ribbons
    Autorzy:
    Kaźmierczak, M.
    Pawlik, K.
    Pawlik, P.
    Gębara, P.
    Przybył, A.
    Wysłocki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402329.pdf
    Data publikacji:
    2015-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.En
    91.60.Pn
    Opis:
    In the present work the magnetic properties and phase constitution of $(Nd_{10}Fe_{67}B_{23})_{100-x}Nb_{x}$ (where x=1, 2, 3, 4) alloys in a form of ribbons were investigated. The ribbon samples were obtained by controlled atmosphere melt-spinning technique. In order to generate the nanocrystalline microstructure, ribbons were annealed at various temperatures (from 923 K to 1023 K) for 5 min. Subsequent annealing resulted in an evolution of the phase constitution accompanied by a change of their magnetic properties. The X-ray diffraction studies show presence of hard magnetic $Nd_{2}Fe_{14}B$, paramagnetic $Nd_{1+\epsilon}Fe_{4}B_{4}$ and ferromagnetic metastable $Nd_{2}Fe_{23}B_{3}$ phases. The best hard magnetic parameters were measure for annealed ribbons of the $(Nd_{10}Fe_{67}B_{23})_{96}Nb_{4}$ alloy.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 1; 91-93
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Annealing Temperature on the Phase Constitution and Magnetic Properties of the Pr₈Dy₁Fe₆₀Co₇Mn₆B₁₄Zr₁Ti₃ Alloy Ribbons
    Autorzy:
    Przybył, A.
    Pawlik, K.
    Pawlik, P.
    Gębara, P.
    Kaszuwara, W.
    Wysłocki, J.
    Filipecka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402331.pdf
    Data publikacji:
    2015-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.En
    91.60.Pn
    Opis:
    Melt-spun ribbons were produced from the Pr₈Dy₁Fe₆₀Co₇Mn₆B₁₄Zr₁Ti₃ base alloy at the surface velocity of the cooper wheel of 30 m/s. The studies showed amorphous structure of ribbons and their soft magnetic properties. X-ray diffraction was used to determine phase constitution of all obtained samples. Annealing of ribbons caused formation of nanocomposite structure, which was a result of coexistence of hard magnetic RE₂(Fe,Co)₁₄B and soft magnetic α-Fe phases. Basic magnetic properties such as: coercivity $\text{}_{J}H_{c}$, remanence $J_{r}$ and maximum energy product $(BH)_\text{max}$ were determined from the measured hysteresis loops. The microstructure of selected specimens was observed by transmission electron microscopy technique.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 1; 94-97
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigations of the magnetization reversal processes in nanocrystalline Nd-Fe-B alloys doped by Nb
    Autorzy:
    Kaźmierczak, M.
    Pawlik, P.
    Wysłocki, J.
    Wnuk, I.
    Gębara, P.
    Pawlik, K.
    Przybył, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1052622.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Sg
    75.50.Bb
    Opis:
    In the following article the magnetic properties and phase composition of (Nd₁₀Fe₆₇B₂₃)_{100-x}Nb_{x} (where x=5, 6, 7, 8, 9) alloys in the form of ribbons are discussed. The X-ray diffraction studies revealed the coexistence of amorphous and nanocrystalline structures consisting of Nd₂Fe₁₄B, Nd_{1+ε}Fe₄B₄ and metastable Nd₂Fe₂₃B₃ phases. The shape of M_{rev} (M_{irr}) suggests that the magnetization reversal proceeds through the nucleation of the reversal domain for the ribbon doped with 5-7 at.% of Nb and the subsequent pinning of the domain walls for ribbons doped with 8 and 9 at.% of Nb.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 789-791
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermomagnetic Properties of $LaFe_{11.0}Co_{0.8}(Si_{1-x}Al_{x})_{1.2}$ (x=0, 0.6) Alloys
    Autorzy:
    Gębara, P.
    Pawlik, P.
    Skorvanek, I.
    Marcin, J.
    Pawlik, K.
    Przybył, A.
    Wysłocki, J.
    Szwaja, M.
    Filipecka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1367677.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Sg
    75.50.Bb
    Opis:
    In the present work, Curie temperature, refrigeration capacity and cooling power of the $LaFe_{11.0}Co_{0.8}(Si_{1-x}Al_{x})_{1.2}$ (where x=0, 0.6) alloys, are investigated. The value of Curie temperature was found to be 280 and 290 K for x=0 and 0.6, respectively. The determined values of cooling power (RCP) and refrigeration capacity (RC) differ only slightly for both investigated alloys. The maximum values of RCP and RC obtained under the change of external magnetic field from 0 to 5 T are 433 J/kg (for x=0) and 290 J/kg (for x=0.6), respectively.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 166-167
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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