Magnetization experiments around Tc in cuprate superconductors: thermal fluctuation, random orientation and inhomogeneity effects
| Autor: | C. Torrón, S. R. Currás, J.A. Veira, Félix Vidal, A. Revcolevschi, Jesús Mosqueira |
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| Rok vydání: | 2000 |
| Předmět: |
Physics
Superconductivity Condensed matter physics Energy Engineering and Power Technology Thermal fluctuations Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials Magnetization Meissner effect Thermal Cuprate Texture (crystalline) Electrical and Electronic Engineering |
| Zdroj: | Physica C: Superconductivity. 332:389-392 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/s0921-4534(99)00709-1 |
| Popis: | We present some measurements of the crossing point of the excess magnetization vs. temperature curves, (ΔM*, T*), and of the Meissner fraction, χFC(T), in granular La1.9Sr0.1CuO4 (LaSCO) samples, before and after grain alignment. These results show that once ΔM* and χFC are adequately and separately corrected for random grain orientation and demagnetizing effects, the remaining extrinsic effects on ΔM*ab (associated with structural and, mainly, stoichiometric inhomogeneities) may be taken into account through χab FC(T*). The intrinsic ΔM*ab values agree with the predictions based on thermal fluctuations of pancakes. |
| Databáze: | OpenAIRE |
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