W. Tokarz, Z. Kakol, Andrzej Kolodziejczyk, Wolfgang T. König, Gerhard Gritzner,
"Magnetization and critical currents in Tl-based high-temperature superconductors"
, in Molecular Physics Reports, Vol. 31, Seite(n) 143-147, 10-2001, ISBN: 1505-1250, Magnetization and critical currents in Tl-based high-temperature superconductors, W. Tokarz, Z. Kakol, A. Kolodziejczyk, W. König and G. Gritzner, Mol. Phys. Rep., 31 (2001) 143 - 147
Original Titel:
Magnetization and critical currents in Tl-based high-temperature superconductors
Sprache des Titels:
Englisch
Original Kurzfassung:
We report on magnetization and magnetic hysteresis measurements for Tl0.74Bi0.3Sr1.8Ba0.2Ca2Cu3Oy and Tl0.6Pb0.5Sr1.8Ba0.2Ca2Cu3Oy ceramic superconductors. For the investigated samples low-field magnetization showed deviation from ideal linear M(H) de-pendence. This anomaly results from the superposition of inter- and intragranular magnetization curves. Consequently in our analysis of magnetization processes the geometry of both sample and grains together with proper estimation of the porosity are taken into account. Fitting the theoretical magnetization curve to experimental data allowed for independent determination of critical fields for superconducting grains and weak links. Also the field dependence of the critical current density was calculated from hysteresis loops based on the standard Bean critical state model.
Sprache der Kurzfassung:
Englisch
Englische Kurzfassung:
We report on magnetization and magnetic hysteresis measurements for Tl0.74Bi0.3Sr1.8Ba0.2Ca2Cu3Oy and Tl0.6Pb0.5Sr1.8Ba0.2Ca2Cu3Oy ceramic superconductors. For the investigated samples low-field magnetization showed deviation from ideal linear M(H) de-pendence. This anomaly results from the superposition of inter- and intragranular magnetization curves. Consequently in our analysis of magnetization processes the geometry of both sample and grains together with proper estimation of the porosity are taken into account. Fitting the theoretical magnetization curve to experimental data allowed for independent determination of critical fields for superconducting grains and weak links. Also the field dependence of the critical current density was calculated from hysteresis loops based on the standard Bean critical state model.
Journal:
Molecular Physics Reports
Volume:
31
Seitenreferenz:
143-147
Erscheinungsmonat:
10
Erscheinungsjahr:
2001
Notiz zum Zitat:
Magnetization and critical currents in Tl-based high-temperature superconductors, W. Tokarz, Z. Kakol, A. Kolodziejczyk, W. König and G. Gritzner, Mol. Phys. Rep., 31 (2001) 143 - 147
ISBN:
1505-1250
Anzahl der Seiten:
5
Reichweite:
international
Publikationstyp:
Aufsatz / Paper in sonstiger referierter Fachzeitschrift
Forschungs-