RF Response of Superconducting-GMR Mixed Sensors, Application to NQR
RF Response of Superconducting-GMR Mixed Sensors, Application to NQR
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DOI：
10.1109/tasc.2007.898056
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发表时间：
2007-07
影响因子：
1.8
通讯作者：
M. Pannetier-Lecoeur;C. Fermon;N. Biziere;J. Scola;A. Walliang
中科院分区：
文献类型：
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作者：
M. Pannetier-Lecoeur;C. Fermon;N. Biziere;J. Scola;A. Walliang
当与巨磁阻(GMR)传感器耦合时，包含收缩的超导回路可以成为非常灵敏的磁场检测设备。巨磁电阻传感器的带宽很宽，主要是由于自由层的铁磁共振效应，在GHz频段有一个限制。我们已经研究了这种混合传感器的射频响应，我们给出了高达10 MHz的飞秒范围的灵敏度。这种传感器的一个应用是核四极共振(NQR)和低场核磁共振(核磁共振)。我们给出的结果表明，在10 MHz以下的频率下，混合传感器可以比优化的谐振线圈更好，这不仅为磁成像和低场核磁共振打开了新的可能性，也为磁传感在射频领域的许多应用打开了新的可能性。
When coupled to a Giant Magneto-Resistive (GMR) sensor, a superconducting loop containing a constriction can be a very sensitive device for magnetic field detection . The bandwidth of a GMR sensor is wide with only a limitation in the GHz regime mainly due to the ferromagnetic resonances of the free layer. We have studied the radiofrequency response of this mixed sensor and we present femtotesla-range sensitivity obtained up to 10 MHz. An application of this kind of sensor is Nuclear Quadrupolar Resonance (NQR) and low field Nuclear Magnetic Resonance (NMR). We present results showing that mixed sensors can be better than optimized resonant coils for frequencies below 10 MHz opening new possibilities not only for magnetic imaging and low field Nuclear Magnetic Resonance but also for a lot of applications of magnetic sensing in the RF domain.