تقرير
Effects of electromagnetic waves on the electrical properties of contacts between grains
| العنوان: | Effects of electromagnetic waves on the electrical properties of contacts between grains |
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| المؤلفون: | Dorbolo, S., Merlen, A., Creyssels, M., Vandewalle, N., Castaing, B., Falcon, E. |
| سنة النشر: | 2007 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Soft Condensed Matter |
| الوصف: | A DC electrical current is injected through a chain of metallic beads. The electrical resistances of each bead-bead contacts are measured. At low current, the distribution of these resistances is large and log-normal. At high enough current, the resistance distribution becomes sharp and Gaussian due to the creation of microweldings between some beads. The action of nearby electromagnetic waves (sparks) on the electrical conductivity of the chain is also studied. The spark effect is to lower the resistance values of the more resistive contacts, the best conductive ones remaining unaffected by the spark production. The spark is able to induce through the chain a current enough to create microweldings between some beads. This explains why the electrical resistance of a granular medium is so sensitive to the electromagnetic waves produced in its vicinity. Comment: 4 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1209/0295-5075/79/54001 |
| URL الوصول: | http://arxiv.org/abs/0705.1775 |
| رقم الأكسشن: | edsarx.0705.1775 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1209/0295-5075/79/54001 |
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