Negative Magnetoresistance in Granular Bi - HTSC with Trapped Magnetic Fields
| Autor: | A. A. Sukhanov, V. I. Omelchenko |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Superconductivity
Condensed Matter - Materials Science Materials science Condensed matter physics Magnetoresistance Condensed Matter - Superconductivity Energy Engineering and Power Technology Field dependence Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Trapping Condensed Matter Physics Magnetic flux Electronic Optical and Magnetic Materials Magnetic field Superconductivity (cond-mat.supr-con) Perpendicular Electrical and Electronic Engineering |
| DOI: | 10.48550/arxiv.cond-mat/0207097 |
| Popis: | Magnetoresistive properties of granular Bi-based HTSC with trapped magnetic fields are investigated in the temperature region near superconducting transition . The effect of trapped field and transport current values and orientations on the field dependence of magnetoresistance is studied. It is found that for the magnetic field parallel and the current perpendicular to trapping inducing field the field dependence of magnetoresistance is nonmonotonic and magnetoresistance turns out to be negative for small fields. The magnetoresistance sign inversion field increases roughly linear with the trapped magnetic field and slightly decrease with transport current. The results are explained in the framework of model of magnetic flux trapping in granules or superconducting loops embedded in weak links matrix. Comment: 5 pages, 4 figures, submitted to conference LT23 |
| Databáze: | OpenAIRE |
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