Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 25: Multiferroics and magnetoelectrics II (joint session MA/KFM)
MA 25.9: Vortrag
Mittwoch, 14. März 2018, 11:45–12:00, EB 202
Magnetoelectric effect in elastic multiferroic composites — •Yuliya Alekhina1, Liudmila Makarova1, Tatiana Rusakova1, Olga Malyshkina2, and Nikolai Perov1 — 1Lomonosov Moscow State University, Moscow, 11999, Russia — 2Tver State University, Tver, 170100, Russia
Magnetorheological elastomers (MREs) are a type of "smart materials" changing their properties under the influence of external factors. MREs represent magnetic particles distributed in elastic medium. Under the magnetic field magnetic moments of particles tend to align what can lead to their shifting and rotating. Such ordering leads to several effects which can be observed in MREs, e.g. magnetorheological effect. It was previously shown that in MREs with both iron and graphite particles change of electrical resistance can be induced by magnetic field. In this case shifting of magnetic particles under the magnetic field creates the internal stresses in polymer matrix, which lead to displacements of the conductive graphite particles. Similar effect can be observed if ferroelectric particles are added to the MRE [1]. Those internal stresses can affect the movement of ferroelectric particles forcing to or preventing them from shifting and rotation thus changing the polarization process. The reverse effect is also possible: under the electric field, the magnetization process can be changed. Thereby, a type of multiferroic composite with elastically coupled ferromagnetic iron particles and ferroelectic PZT particles was prepared and investigated in this work. The work was financially supported by Grant RFBR 18-32-00354. [1] L.A. Makarova et al., IEEE Transactions on Magnetics, 2017, 53, 11, pp.7