Project A4

ΔE-effect Sensors

ΔE-effect magnetic field sensors utilize the frequency shift of a high frequency electromechanical resonator due to the change in the Young’s modulus of a magnetostrictive component in a magnetic field. The sensor allows broadband magnetic field measurements at low frequencies and are very robust. Based on successful preparatory work, the project aims at exploring the best overall strategy for ΔE-effect sensors, including different sensor geometries and resonance modes, new piezoelectric materials, the use of magnetic field concentrators, and exchange bias materials, which enables fully integrated sensors without coils and minimal crosstalk.


Franz Faupel
Prof. Dr.
Lead of projects A2, A4, B7
Sebastian Zabel
Doctoral researcher


Role within the Collaborative Research Centre

Project A4 is closely linked with many other subprojects within the CRT1261, as it covers all aspects of the ΔE sensor principle. The enormous progress of the ΔE sensors, reflected in a sensitivity increase of almost five orders of magnitude over the last few years, has shown that it is essential to have a single project that is in charge of planning and synchronizing the development of the complete sensor system chain from the material to the design and to the electronics and data processing. Cooperation will therefore include almost all groups in Part A focusing on material parameters as well as the groups working on medical sensor systems in Part B. Below, the fields of cooperation with the individual projects are listed in more detail:

A1: Magnetic losses, FeGaB, exchange bias, stress control.
A2: Alternative magnetic materials such as viscous magnets.
A3: Resonator design, Δf sensorss.
A5: Piezotronic readout (as outlook).
A7: Piezoelectric excitation, stress control.
A8: FEM for sensor design and magnetic flux concentrators.
B1: Analog electronics and noise measurement and reduction.
B2: Digital electronics and noise reduction, multimode operation.
Z1: Sensor fabrication.
Z2: Sensor characterization.

Project A4 will participate in the focus group F2 “Sensor Concepts” where ΔE sensors are an important subject, but also in the focus group F1 “Modeling” because various aspects of the design of new ΔE sensors, addressed above, require modeling.

Project-related Publications

A. Kittmann, P. Durdaut, S. Zabel, J. Reermann, J. Schmalz, B. Spetzler, D. Meyners, N. X. Sun, J. McCord, M. Gerken, G. Schmidt, M. Höft, R. Knöchel, F. Faupel, and E. Quandt: Wide Band Low Noise Love Wave Magnetic Field Sensor System; Scientific Reports, vol. 8, no. 278, January 2018;

P. Durdaut, J. Reermann, S. Zabel, C. Kirchhof, E. Quandt, F. Faupel, G. Schmidt, R. Knöchel, and M. Höft: Modeling and Analysis of Noise Sources for Thin-Film Magnetoelectric Sensors Based on the Delta-E Effect; IEEE Transactions on Instrumentation and Measurement, vol. 66, no. 10, pp. 2771-2779, October 2017;

S. Zabel, J. Reermann, S. Fichtner, C. Kirchhof, E. Quandt, B. Wagner, G. Schmidt, and F. Faupel: Multimode Delta-E Effect Magnetic Field Sensors with Adapted Electrodes; Appl. Phys. Lett. 108, 222401 (2016);

Financial Support

The Collaborative Research Center 1261 is funded by the German Research Foundation (DFG).

SFB1261 Microsite

Click here to visit our Microsite with information for students, teachers and the public (German and English version available).

Recent Publications

J. Reermann, P. Durdaut, S. Salzer, T. Demming, A. Piorra, E. Quandt, N. Frey, M. Höft, and G. Schmidt: Evaluation of Magnetoelectric Sensor Systems for Cardiological Applications, Measurement (Elsevier), ISSN 0263-2241, 2017,

S. B. Hrkac, C. T. Koops, M. Abes, C. Krywka, M. Müller, M. Burghammer, M. Sztucki, T. Dane, Kaps, Y. K. Mishra,R. Adelung, J. Schmalz, M. Gerken, E. Lage, C. Kirchhof, E. Quandt, O. M. Magnussen, and B. M. Murphy: Tunable Strain in Magnetoelectric ZnO Microrod Composite Interfaces; ACS Appl. Mater. Interfaces, 2017, 9 (30), pp 25571–25577; DOI: 10.1021/acsami.6b15598




Prof. Dr. Eckhard Quandt

Kiel University
Institute for Materials Science


Interner 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 an der Universität Kiel

Olshausenstraße 62 
D-24118 Kiel

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