Week 10 (November 11, 2019 till November 15, 2019)

With Prof. McCord's students, we finished acquiring sets of images for two of my sensors. One of these was a device with rather low magnetic frequency response, but it's the one that I had a complete set of noise results for. The second was a device with strong frequency response to magnetic fields, and with other excellent characteristics such as a very smooth and well behaved frequency response curve. However, this one is the one that stopped working (mentioned in week 5) and lacked noise data, but the resonator was still intact, so the magnetic domains could still be studied. The MOKE imaging results were very illuminating. For example, we deduced that domain orientation was pretty much opposite to what I expected in the sensor with low frequency response.

Going back to Prof. Höft's lab, I resumed characterizing sensors in order to finish another set of noise measurements, with a sensor that has substantially better frequency response than the one that had already been measured. The goal is to compare whether better frquency response actually results in better detectivity. The next sensor candidate was measured and turned out to have poor characteristics; it was removed from consideration. I selected another device, which was very promising based on old data--but, as it often happens, there was an accident, and the sensor was broken. We tweaked the 3D-printed holder to improve the stability of the probe, and proceeded to test the next device that had good characteristics (but not as good as the one that was broken). We then performed the noise measurement.


Alexei Matyushov 

Northeastern University
Boston, MA, USA

Visiting period: September 2019 - November 2019

Topic: Limit of detection and noise of magentoelectric MEMS magnetometers

Supervisors: Jeffrey McCord, Michael Höft

Further Visiting Students




Prof. Dr. Eckhard Quandt

Kiel University
Institute for Materials Science


Internal server



Christian-Albrechts-Universität zu Kiel (CAU)

Christ.-Albrechts-Platz 4
D-24118 Kiel


University Hospital Schleswig-Holstein, Campus Kiel (UKSH)

Arnold-Heller-Straße 3
D-24105 Kiel


Fraunhofer Institute for Silicon Technology, Itzehoe (ISIT)

Fraunhoferstrasse 1
D-25524 Itzehoe  


IPN - Leibniz-Institut für die Pädagogik der Naturwissenschaften und Mathematik 

Olshausenstraße 62 
D-24118 Kiel

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