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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 16: Multiferroics and Magnetoelectric coupling II (joint session MA/KFM)

KFM 16.1: Vortrag

Freitag, 5. April 2019, 09:30–09:45, H39

Reversible magnetoelectric interconversion of ferroic domain patterns in (Dy,Tb)FeO₃ — •Ehsan Hassanpour¹, Mads C. Weber¹, Yusuke Tokunaga², Yasujiro Taguchi³, Yoshinori Tokura³, Thomas Lottermoser¹, and Manfred Fiebig^1,3 — ¹ETH Zurich, Switzerland — ²University of Tokyo, Japan — ³RIKEN CEMS, Japan

Multiferroic materials can show a variety of exquisite effects due to hosting coexisting and complex magnetic and electric orders. Recently it was reported that a ferroelectric domain pattern from one layer is transfered to a ferromagnetic layer in a multiferroic heterostructure[1]. Here we show that we can reversibly interconvert magnetic and ferroelectric domain patterns in a single phase of multiferroic bulk system Dy_0.7Tb_0.3FeO₃. In this material, it was shown that a ferroelectric polarization is induced as a result of interaction of two magnetic sublattices of iron Fe³⁺ and rare-earth (Dy,Tb) R³⁺ via exchange forces. The strong coupling of these three order parameters creates a variety of composite domains and domain walls. Using magnetooptic imaging, we show that electric field pulses of specific speeds and amplitudes can generate and tune those domains/domain walls. Ultimately, by imprinting a domain pattern in the rare-earth’s antiferromagnetic order, we transfer it from the ferromagnetic order of iron to the ferroelectric order and vice versa using magnetic and electric fields, respectively.

[1] De Luca et al. Phys. Rev. Applied 10, 054030 (2018)