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Lecture

Magnetoelectic cantilever theory: Effect of elastic seed and adhesion layers and multi-domain concepts on response of exchange bias multilayer sensors

Thursday (08.06.2017)
12:30 - 12:50 Förde III
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Resonant magnetoelectric cantilever sensors of strain-coupled magnetostrictive, piezoelectric and substrate layers display high potential for achieving sufficient fT H-field sensitivities for medical cardio and neuro diagnostics. Sensors where

magnetostrictive layers are replaced by exchange bias multilayer stacks [1] are promising to avoid external bias fields and the buildup of internal demagnetization fields, the latter of which giving rise to domains, domain-wall motion [2], and noise. Here, we

theoretically investigate the magnetoelectric response [3] of exchange bias multilayer sensors with single domain magnetostrictive layers of different magnetostriction. Using a new analytic model of the resonant magnetoeletric response in strain-coupled multilayers

we systematically investigate the effect of different interlayer domain structures and the elastic effects of seed and adhesion layers. We consider AlN as piezoelectric phase and FeCoSiB as magnetostrictive phase with Si substrates.

Funding by the Collaborative Research Center SFB 1261 is gratefully acknowledged.

[1] E. Lage, N.O. Urs, V. Röbisch, I. Teliban, R. Knöchel, D. Meyners, J. McCord, E. Quandt . Magnetic domain control and voltage response of exchange biased magnetoelectric composites, Applied Physics Letters, 104, 132405 (2014)

[2] N.O. Urs, I. Teliban, A. Piorra, R. Knöchel, E. Quandt, J. McCord, Origin of hysteretic magnetoelastic behavior in magnetoelectric 2-2 composites, Applied Physics Letters, 105, 202406 (2014).

[3] M.C. Krantz, J.L. Gugat, M. Gerken, Resonant magnetoelectric response of composite cantilevers: Theory of short vs. open circuit operation and layer sequence effects, AIP Advances, 5, 117230 (2015).

Speaker:
Dr. Matthias C. Krantz
Christian-Albrechts-Universität zu Kiel
Additional Authors:
  • Julius Schmalz
    Üniversität Kiel
  • Prof. Dr. Martina Gerken
    Universität Kiel