Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 143-147 |
| Number of pages | 5 |
| Journal | Molecular Physics Reports |
| Volume | 31 |
| Publication status | Published - Oct 2001 |
Fields of science
- 104005 Electrochemistry
- 104006 Solid state chemistry
- 104014 Surface chemistry
- 104017 Physical chemistry
- 105113 Crystallography
- 105116 Mineralogy
- 503013 Subject didactics of natural sciences
- 204 Chemical Process Engineering
- 204001 Inorganic chemical technology
- 205016 Materials testing
- 210006 Nanotechnology
- 211104 Metallurgy