Thermally-activated vortex dynamics in Bi2CaSr2Cu2O8+δ studied by complex susceptibility measurements
| Autor: | Jhpm Jack Emmen, de Wjm Wim Jonge, Vam Vic Brabers |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Copper oxide
Materials science High-temperature superconductivity Condensed matter physics Field (physics) Energy Engineering and Power Technology chemistry.chemical_element Activation energy Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials Magnetic field law.invention Bismuth chemistry.chemical_compound Nuclear magnetic resonance chemistry law Electrical and Electronic Engineering Single crystal |
| Zdroj: | Physica C: Superconductivity. 176:137-146 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/0921-4534(91)90706-5 |
| Popis: | Complex AC magnetic susceptibility has been measured on Bi2CaSr2Cu2O8+δ single crystals with hnc, Hdc|c-axis. It will be shown that field, frequency and temperature dependence of both χ′ and χ″ in a constant but sufficiently large DC magnetic field can quantitatively be described by thermally-activated flux flow (TAFF) provided that a narrow distribution of activation energies is implemented. From the frequency dependence of the ACχ transition, a power law for the DC field dependence of the activation energy has been found, with an exponent −1 4 . |
| Databáze: | OpenAIRE |
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