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Department of Physics & Astronomy at the University of Utah

MRSEC Paper Published in Nature Communications

Prof. Christoph Boehme, along with Prof. John Lupton, students Will Baker, Kapildeb Ambal, David Waters, Rachel Baarda, Hiroki Morishita, Kipp van Schooten, and former alumnus Dane McCamey, have recently published a paper in Nature Communications, "Robust Absolute Magnetometry with Organic Thin-Film Devices" (doi:10.1038/ncomms1895) regarding a low cost high sensitivity organic spintronic magnetic sensor. This is one of the first `high-visibility' products of the new NSF funded Materials Research Science & Engineering Center (MRSEC).


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.

Full paper available here.

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