Die u:cris Detailansicht:
Magnetic field and current density dependence of the mixed-state Hall effect in Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>x</sub>
- Autor(en)
- W. Göb, W. Lang, J. D. Pedarnig, R. Rössler, D. Bäuerle
- Abstrakt
We report on measurements of the mixed-state Hall effect in Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub x/ thin films in magnetic fields ranging from B=60 mT to B=1 T and current densities j up to 3 MA cm/sup -2/. To reduce the problem of sample heating, we employed a pulsed current technique and developed a new heating correction procedure. We observe a double sign reversal of the Hall resistivity rho /sub yx/ in the mixed state, resulting in two peaks which both depend on B and j. The position of the sign changes only varies with B, but is found to be independent of j. The Hall conductivity sigma /sub xy/ turns positive again in the superconducting regime and dramatically increases towards lower temperatures and current densities, as the pinning is reduced by intense currents.
- Organisation(en)
- Elektronische Materialeigenschaften
- Journal
- Physica C: Superconductivity and its Applications
- Band
- 317-318
- Seiten
- 627-629
- Anzahl der Seiten
- 3
- ISSN
- 0921-4534
- DOI
- https://doi.org/10.1016/S0921-4534(99)00158-6
- Publikationsdatum
- 1999
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103018 Materialphysik
- Schlagwörter
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/5a4e6bef-1a01-473a-90ad-160769eac40a