Synchronous precessional motion of multiple domain walls in a ferromagnetic nanowire by perpendicular field pulses

June Seo Kim, Mohamad Assaad Mawass, André Bisig, Benjamin Krüger, Robert M. Reeve, Tomek Schulz, Felix Büttner, Jungbum Yoon, Chun Yeol You, Markus Weigand, Hermann Stoll, Gisela Schütz, Henk J.M. Swagten, Bert Koopmans, Stefan Eisebitt, Mathias Kläui

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68 Scopus citations

Abstract

Magnetic storage and logic devices based on magnetic domain wall motion rely on the precise and synchronous displacement of multiple domain walls. The conventional approach using magnetic fields does not allow for the synchronous motion of multiple domains. As an alternative method, synchronous current-induced domain wall motion was studied, but the required high-current densities prevent widespread use in devices. Here we demonstrate a radically different approach: we use out-of-plane magnetic field pulses to move in-plane domains, thus combining field-induced magnetization dynamics with the ability to move neighbouring domain walls in the same direction. Micromagnetic simulations suggest that synchronous permanent displacement of multiple magnetic walls can be achieved by using transverse domain walls with identical chirality combined with regular pinning sites and an asymmetric pulse. By performing scanning transmission X-ray microscopy, we are able to experimentally demonstrate in-plane magnetized domain wall motion due to out-of-plane magnetic field pulses.

Original languageEnglish
Article number3429
JournalNature Communications
Volume5
DOIs
StatePublished - 2014

Bibliographical note

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© 2014 Macmillan Publishers Limited. All rights reserved.

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