Reentrant reversible remanent magnetization in superconducting submicron YBaCuO particles
| Autor: | E. V. Blinov, A. G. Lyublinsky, R. Laiho, K. B. Traito, E. Lähderanta |
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| Rok vydání: | 1999 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Magnetic moment London penetration depth Energy Engineering and Power Technology Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetization Remanence Condensed Matter::Superconductivity Quasiparticle Particle size Electrical and Electronic Engineering Cooper pair |
| Zdroj: | Physica C: Superconductivity. 316:45-55 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/s0921-4534(99)00242-7 |
| Popis: | Reversible properties of the remanent magnetic moment, M rem , in superconducting submicron- and micron-size Y–Ba–Cu–O particles and thin films are investigated with a SQUID magnetometer. In micron-size particles and thin films a monotonic increase of M rem was observed when decreasing the temperature. In submicron particles, the same monotonic behaviour is observed at first but at low temperatures an unusual reentrant behaviour was found: M rem decreased when cooling the sample below 6 K. This phenomenon is independent of the direction of the thermal cycle. Possible mechanisms of this effect, such as midgap states in the quasiparticle excitation spectrum and defect-induced localization of Cooper pairs, are discussed. |
| Databáze: | OpenAIRE |
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