Robust absolute magnetometry with organic thin-film devices.
Robust absolute magnetometry with organic thin-film devices.
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DOI：
10.1038/ncomms1895
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发表时间：
2012-06-12
影响因子：
16.6
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中科院分区：
文献类型：
--
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近年来，基于有机薄膜材料的磁场传感器吸引了相当大的兴趣，因为它们可以以非常低的成本在柔性衬底上制造。然而，这种磁阻传感器的技术相关性是有限的，由于其狭窄的磁场范围（~ 30 mT）和连续校准所需的补偿温度波动和材料退化。相反地，基于磁共振（MR）的传感器利用基本物理关系来进行场的极其精确的测量，其通常是大的且昂贵的。在这里，我们展示了一个有机磁共振为基础的磁力计，采用自旋相关的电子跃迁的有机二极管，它结合了低成本的薄膜制造和集成性能的有机电子与MR为基础的传感器的精度。我们表明，该器件不需要校准，在大的温度和磁场范围内工作，对材料退化具有鲁棒性，并且允许<50 nT Hz−1/2的绝对灵敏度。基于有机磁电阻的磁强计受到灵敏度范围窄、性能退化和温度波动的限制。Baker等人展示了一种基于磁共振的有机薄膜磁力计，其通过利用磁共振的磁性来克服这些缺点。
Magnetic field sensors based on organic thin-film materials have attracted considerable interest in recent years as they can be manufactured at very low cost and on flexible substrates. However, the technological relevance of such magnetoresistive sensors is limited owing to their narrow magnetic field ranges (∼30 mT) and the continuous calibration required to compensate temperature fluctuations and material degradation. Conversely, magnetic resonance (MR)-based sensors, which utilize fundamental physical relationships for extremely precise measurements of fields, are usually large and expensive. Here we demonstrate an organic magnetic resonance-based magnetometer, employing spin-dependent electronic transitions in an organic diode, which combines the low-cost thin-film fabrication and integration properties of organic electronics with the precision of a MR-based sensor. We show that the device never requires calibration, operates over large temperature and magnetic field ranges, is robust against materials degradation and allows for absolute sensitivities of <50 nT Hz−1/2. Magnetometers based on organic magnetoresistance are limited by narrow sensitivity ranges, degradation and temperature fluctuations. Baker et al. demonstrate a magnetic resonance-based organic thin film magnetometer, which overcomes these drawbacks by exploiting the metrological nature of magnetic resonance.
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影响因子：
8.6
作者：
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通讯作者：
Wohlgenannt, M.
影响因子：
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影响因子：
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作者：
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HORHOLD, HH