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http://doi.org/10.25358/openscience-101
Autoren: | 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 |
Titel: | Investigation of the Dzyaloshinskii-Moriya interaction and room temperature skyrmions in W/CoFeB/MgO thin films and microwires |
Online-Publikationsdatum: | 20-Aug-2019 |
Erscheinungsdatum: | 2017 |
Sprache des Dokuments: | Englisch |
Zusammenfassung/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-Sachgruppe: | 530 Physik 530 Physics |
Veröffentlichende Institution: | Johannes Gutenberg-Universität Mainz |
Organisationseinheit: | FB 08 Physik, Mathematik u. Informatik |
Veröffentlichungsort: | 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 |
Publikationstyp: | Zeitschriftenaufsatz |
Nutzungsrechte: | Urheberrechtsschutz |
Informationen zu den Nutzungsrechten: | https://rightsstatements.org/vocab/InC/1.0/ |
Zeitschrift: | Applied physics letters 111 2 |
Seitenzahl oder Artikelnummer: | 022409-1 022409-5 |
Verlag: | American Inst. of Physics |
Verlagsort: | Melville, NY |
Erscheinungsdatum: | 2017 |
ISSN: | 1077-3118 0003-6951 |
URL der Originalveröffentlichung: | http://dx.doi.org/10.1063/1.4991360 |
DOI der Originalveröffentlichung: | 10.1063/1.4991360 |
Enthalten in den Sammlungen: | JGU-Publikationen |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | ||
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59204.pdf | 273.96 kB | Adobe PDF | Öffnen/Anzeigen |