Autor: Woch, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Study of Resistive Superconducting Transition of Bulk $(Bi_{0.6}Pb_{0.4})_2Sr_2Ca_2Cu_{3}O_{x}$
Autorzy:: Woch, W.
Chrobak, M.
Zalecki, R.
Kołodziejczyk, A.
Powiązania:: https://bibliotekanauki.pl/articles/1371417.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.25.F-
74.25.Uv
74.25.Wx
74.72.-h
64.60.F-
Opis:: The temperature widths of the resistive transition as well as the thermal fluctuations of bulk $(Bi_{0.6}Pb_{0.4})_2Sr_2Ca_2Cu_{3}O_{x}$ superconductor with $T_{c,50%}$ = 107.1 K were studied. The applied magnetic field widens the resistive transition according to the following formula: ΔT = $CH^{m} + ΔT_{0}$. The value of exponent m = 0.44 suggests that there is strong pining of vortices, especially at lower temperatures. The critical exponents λ of the conductivity were calculated using the following equation: Δσ = $Kε^{-λ}$, with the $λ_1$ = 1.75 close to the zero critical temperature and $λ_2$ = 3.77 at higher temperatures. These values were discussed within the available theoretical models.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 328-329
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: AC Susceptibility of YBCO 1:2:3 Films on Silver Substrates
Autorzy:: Zalecki, R.
Woch, W.
Chrobak, M.
Kołodziejczyk, A.
Powiązania:: https://bibliotekanauki.pl/articles/1374144.pdf
Data publikacji:: 2014-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.72.-h
74.25.F-
74.25.Ha
74.25.Sv
Opis:: The $YBa_2Cu_3O_δ$ films were obtained directly on silver substrates by the sedimentation processes. The thicknesses of these films are of the order of several tens μ. The temperature dependences of the AC susceptibility of the films were measured and analyzed. The critical temperatures of these specimens obtained from the dispersion part of AC susceptibility vary from 89.2 K to 92.5 K. The critical currents were calculated from the absorption part of AC susceptibility using the Bean model. The temperature dependences of the critical currents were fitted using the Ginzburg-Landau strong coupling limit approach.
Źródło:: Acta Physica Polonica A; 2014, 126, 4a; A-13-A-15
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Critical Currents of Bismuth 1G Tape
Autorzy:: Woch, W.
Zalecki, R.
Chrobak, M.
Kołodziejczyk, A.
Powiązania:: https://bibliotekanauki.pl/articles/1385464.pdf
Data publikacji:: 2015-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.72.-h
74.25.F-
74.25.Ha
74.25.Sv
Opis:: The critical currents of commercial bismuth based superconducting tape were determined in the two ways. In the first one the transport critical current density was measured by the four points method using the dc current power supply at the liquid nitrogen temperature. In the second one the critical current densities were obtained from the absorption part of ac susceptibility measurements using the Bean model near the critical temperature. The temperature dependence of the critical current densities was fitted to take advantage of the Ginzburg-Landau strong-coupling limit approach. Using the fit parameters the critical current density at 77 K was calculated. The critical temperature of this tape ($T_{c}$= 110.5 K) was determined from the ac susceptibility measurements.
Źródło:: Acta Physica Polonica A; 2015, 127, 2; 315-317
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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