Measurements of ultra-low DC fields by high-T-c superconducting cores: The effect of calcination temperature
作者： Ugur Topal , Fatma Alıkma , Cengiz Birlikseven , Orhan Uzun , Uğur Kölemen
DOI: 10.1016/J.JALLCOM.2012.03.085
关键词: Calcination 、 Sensitivity (electronics) 、 Nuclear magnetic resonance 、 Wide dynamic range 、 Harmonic 、 Magnetic field 、 Superconductivity 、 Magnetometer 、 Chemistry 、 Condensed matter physics 、 Signal
摘要: Abstract In this study, the effects of weak links between grains ceramic superconductors on sensitivity a DC magnetic field sensor were examined. The evolution 2nd harmonic signal strength, which determines magnetometer sensitivity, with critical current density J c was especially analyzed. values adjusted by synthesis Y-123 at different calcination temperatures. It observed that strength 2f increases as temperature and so, increases. This is contrary to common expectations. Our experiments have shown changes quite linearly in wide dynamic range (10 −4 10 −9 T) sample calcined 950 °C. ways measuring fields low 1 nT are described paper.
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