Electric field driven magnetic domain wall motion in ferromagnetic-ferroelectric heterostructures

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2014
Major/Subject
Mcode
Degree programme
Language
en
Pages
012401/1-4
Series
Applied Physics Letters, Volume 104, Issue 1
Abstract
We investigate magnetic domain wall (MDW) dynamics induced by applied electric fields in ferromagnetic-ferroelectric thin-film heterostructures. In contrast to conventional driving mechanisms where MDW motion is induced directly by magnetic fields or electric currents, MDW motion arises here as a result of strong pinning of MDWs onto ferroelectric domain walls (FDWs) via local strain coupling. By performing extensive micromagnetic simulations, we find several dynamical regimes, including instabilities such as spin wave emission and complex transformations of the MDW structure. In all cases, the time-averaged MDW velocity equals that of the FDW, indicating the absence of Walker breakdown.
Description
Keywords
domain wall dynamics, applied electric fields, thin-film heterostructures
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Citation
Van de Wiele, Ben & Laurson, Lasse & Franke, Kevin J. A. & van Dijken, Sebastiaan. 2014. Electric field driven magnetic domain wall motion in ferromagnetic-ferroelectric heterostructures. Applied Physics Letters. Volume 104, Issue 1. 012401/1-4. ISSN 0003-6951 (printed). DOI: 10.1063/1.4860963