Wszystkie pola: Kravčák, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Asymmetric Magneto-Impedance in CoFeSiB Amorphous Microwire
Autorzy:: Kravčák, J.
Varga, R.
Powiązania:: https://bibliotekanauki.pl/articles/1507026.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.30.Gw
75.50.Kj
75.60.Ej
Opis:: The symmetric dependences of magneto-impedance on the applied longitudinal dc magnetic field were measured in an amorphous CoFeSiB microwire. Additional application of a circumferential dc bias magnetic field was used to achieve the asymmetric magneto-impedance in the microwire. The obtained results are theoretically interpreted taking into account the cylindrical core-shell magnetic structure and the helical anisotropy induced during the microwire preparation. The observed very steep linear magneto-impedance dependences crossing H = 0 are promising for technical applications of the CoFeSiB microwire as a sensor of low magnetic fields.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 762-763
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Complex Permeability After-Effect and Analysis of Power Losses in Ferromagnetic Co-Based Amorphous Alloy
Autorzy:: Kravčák, J.
Varga, R.
Vojtaník, P.
Powiązania:: https://bibliotekanauki.pl/articles/1813518.pdf
Data publikacji:: 2008-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.40.Gb
75.60.Ch
75.60.Lr
Opis:: Complex permeability $(μ=μ_1-iμ_2)$ after-effect of near-zero magnetostrictive CoFeCrSiB amorphous alloy was investigated in magnetic field H (t)= $H_0$ exp ( i 2π f t) after demagnetization. For frequencies f from 200 Hz to 2000 Hz and for the small amplitude H_0 < $H_{cr}$ we observed practically constant both real $μ_1$ and imaginary part $μ_2$ of permeability. A measured small decrease in the real part $μ_1$ and increase in the imaginary part $μ_2$ with frequency f were theoretically calculated for a quadratic form of a domain wall potential $E_S$ (x)=1/2α $x^2$. The calculated loss factortan δ = $μ_2 μ_1$, which is small at amplitude $H_0$ < $H_{cr}$, corresponds to power losses due to eddy currents induced around reversibly moving domain walls.
Źródło:: Acta Physica Polonica A; 2008, 113, 1; 43-46
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Magnetic and structural characterization of NiXSb (X = Mn, Cr) Heusler ribbon
Autorzy:: Ryba, T.
Vargova, Z.
Ilkovic, S.
Reiffers, M.
Kravcak, J.
Gyepes, R.
Varga, R.
Powiązania:: https://bibliotekanauki.pl/articles/1050967.pdf
Data publikacji:: 2017-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.47.Np
75.30.Gw
85.75.-d
Opis:: Half-Heusler alloys with composition NiMnSb and NiCrSb have been prepared by rapid-quenching method. NiMnSb half-Heusler alloy is characterized by single phase C1_{b} with polycrystalline structure while crystalline structure of NiCrSb shows multiphase system. Magnetic measurements indicated high anisotropy and easy magnetization direction in the parallel direction with respect to ribbon axis for NiMnSb alloy while paramagnetic behavior appears for NiCrSb alloy down to 50 K.
Źródło:: Acta Physica Polonica A; 2017, 131, 4; 857-859
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Structural and Magnetic Characterization of NiMnSb Half-Heusler Alloy Prepared by Rapid Quenching
Autorzy:: Ryba, T.
Vargova, Z.
Varga, R.
Ilkovic, S.
Reiffers, M.
Haskova, V.
Szabo, P.
Kravcak, J.
Gyepes, R.
Powiązania:: https://bibliotekanauki.pl/articles/1368037.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.30.Gw
75.50.Cc
Opis:: NiMnSb half-Heusler alloy in the form of a rod has been prepared by rapid quenching (suction-casting) method. The rod is characterized by single phase $C1_b$ crystalline structure with lattice parameter a=5.982 Å. Magnetic measurements reveal an isotropic character of bulk NiMnSb alloy. Our study shows relatively high spin polarization of bulk NiMnSb in the range 35-50%.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 206-207
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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