Temat: 74.25.Nf - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Phase-Slip Processes in Superconducting Films: AC Josephson Effect and New Phase Transition
Autorzy:: Dmitriev, V.
Zolochevskii, I.
Bezuglyi, E.
Kondrashev, D.
Powiązania:: https://bibliotekanauki.pl/articles/1812339.pdf
Data publikacji:: 2008-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.25.Fy
74.25.Nf
74.50.+r
Opis:: The resistive direct current state in wide thin superconducting films as the phase transition from superconducting to normal state is investigated in the absence of external magnetic field. We showed that the states of a wide film with increasing transport current appear in the following order: the superconducting state; the resistive vortex state; the critical state; the new vortex-free resistive state with phase-slip lines; the normal state. We detected the Shapiro current steps on the current-voltage characteristic of the wide film, which arise due to interaction of intrinsic Josephson radiation of phase-slip lines with external microwave irradiation.
Źródło:: Acta Physica Polonica A; 2008, 114, 1; 257-261
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Influence of Ferromagnetic Layer on Critical Current of a Superconducting Wire
Autorzy:: Gömöry, F.
Vojenčiak, M.
Šouc, J.
Seiler, E.
Powiązania:: https://bibliotekanauki.pl/articles/1813946.pdf
Data publikacji:: 2008-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 41.20.Gz
74.25.Fy
74.25.Nf
Opis:: We investigated how a 10-50 μm layer from soft ferromagnetic material, incorporated in the architecture of a composite superconducting tape, could influence the capability of the tape to transport electrical current. Numerical procedure was developed to calculate the local distribution of magnetic field and current in the condition when all the superconductor is carrying its critical current density. It was found that the concentration of magnetic flux in ferromagnetic layers allows to reduce the local value of magnetic flux density felt by the superconductor. In this way, the critical current of the tape in low applied magnetic fields can be improved. This theoretical prediction is confirmed by experimental observation.
Źródło:: Acta Physica Polonica A; 2008, 113, 1; 605-608
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Influence of DC Magnetic Field on AC Loss of YBCO Coated Conductor with Ferromagnetic Substrate
Autorzy:: Vojenčiak, M.
Šouc, J.
Gömöry, F.
Seiler, E.
Powiązania:: https://bibliotekanauki.pl/articles/1813686.pdf
Data publikacji:: 2008-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.25.Fy
74.25.Nf
74.78.Bz
75.50.-y
Opis:: Most of YBCO tape conductors are prepared on a ferromagnetic substrate. The ferromagnetic material is then exposed to the self magnetic field of the superconductor and also to external magnetic field. In AC magnetic field hysteretic and eddy current losses are generated in the substrate. In this work the AC transport loss of an YBCO coated conductor on a ferromagnetic substrate was measured using electromagnetic method. There are two contributions to total loss - a loss in the superconductor and a loss in the substrate. To suppress the hysteretic loss in the substrate, it is possible to saturate it using DC magnetic field. In this regime significant decrease in total loss was observed.
Źródło:: Acta Physica Polonica A; 2008, 113, 1; 359-362
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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