| Autor: |
Alıkma, Fatma, Birlikseven, Cengiz, Gulmez, Gulay, Turhan, Enis, Gulce Coker, Eylem, Topal, Ugur |
| Předmět: |
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| Zdroj: |
Journal of Superconductivity & Novel Magnetism; Oct2012, Vol. 25 Issue 7, p2539-2545, 7p, 3 Diagrams, 2 Graphs |
| Abstrakt: |
In this study we report on some critical factors affecting the sensitivity of a magnetic field sensor whose working principle is based on a linear DC field dependence of the second harmonic of the AC response in polycrystalline type-II superconductors. DC-fields down to 2 nT in magnitude could be detected by finding optimal conditions. The optimal sensor design was determined by studying superconductor cores having different geometries and coil configurations. The optimal AC-field frequency, which is required for excitation of the specimen, was found to be 50 kHz. The second harmonic signal changes quite linearly with the DC-field up to 0.1 Oe. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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