Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-101
Authors: | Jaiswal, Samridh Litzius, Kai Lemesh, Ivan Büttner, Felix Finizio, Simone Raabe, Jörg Weigand, Markus Lee, Kyujoon Langer, Jürgen Ocker, Berthold Jakob, Gerhard Beach, Geoffrey S. D. Kläui, Mathias |
Title: | Investigation of the Dzyaloshinskii-Moriya interaction and room temperature skyrmions in W/CoFeB/MgO thin films and microwires |
Online publication date: | 20-Aug-2019 |
Year of first publication: | 2017 |
Language: | english |
Abstract: | Recent studies have shown that material structures, which lack structural inversion symmetry and have high spin-orbit coupling can exhibit chiral magnetic textures and skyrmions which could be a key component for next generation storage devices. The Dzyaloshinskii-Moriya Interaction (DMI) that stabilizes skyrmions is an anti-symmetric exchange interaction favoring non-collinear orientation of neighboring spins. It has been shown that materials systems with high DMI can lead to very efficient domain wall and skyrmion motion by spin-orbit torques. To engineer such devices, it is important to quantify the DMI for a given material system. Here, we extract the DMI at the Heavy Metal/Ferromagnet interface using two complementary measurement schemes, namely, asymmetric domain wall motion and the magnetic stripe annihilation. By using the two different measurement schemes, we find for W(5nm)/Co20Fe60B20(0.6 nm)/MgO(2 nm) the DMI to be 0.68 +/- 0.05 mJ/m(2) and 0.73 +/- 0.5 mJ/m(2), respectively. Furthermore, we show that this DMI stabilizes skyrmions at room temperature and that there is a strong dependence of the DMI on the relative composition of the CoFeB alloy. Finally, we optimize the layers and the interfaces using different growth conditions and demonstrate that a higher deposition rate leads to a more uniform film with reduced pinning and skyrmions that can be manipulated by spin orbit torques. Published by AIP Publishing. |
DDC: | 530 Physik 530 Physics |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 08 Physik, Mathematik u. Informatik |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-101 |
URN: | urn:nbn:de:hebis:77-publ-592043 |
Version: | Accepted version |
Publication type: | Zeitschriftenaufsatz |
License: | In Copyright |
Information on rights of use: | https://rightsstatements.org/vocab/InC/1.0/ |
Journal: | Applied physics letters 111 2 |
Pages or article number: | 022409-1 022409-5 |
Publisher: | American Inst. of Physics |
Publisher place: | Melville, NY |
Issue date: | 2017 |
ISSN: | 1077-3118 0003-6951 |
Publisher URL: | http://dx.doi.org/10.1063/1.4991360 |
Publisher DOI: | 10.1063/1.4991360 |
Appears in collections: | JGU-Publikationen |