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Authors: Masciocchi, Giovanni
van Der Jagt, Johannes Wilhelmus
Syskaki, Maria-Andromachi
Lamperti, Alessio
Wolff, Niklas
Lotnyk, Andriy
Langer, Juergen
Kienle, Lorenz
Jakob, Gerhard
Borie, Benjamin
Kehlberger, Andreas
Ravelosona, Dafine
Kläui, Mathias
Title: Control of magnetoelastic coupling in Ni/Fe multilayers using He+ ion irradiation
Online publication date: 16-Jan-2023
Year of first publication: 2022
Language: english
Abstract: This study reports the effects of post-growth He+ irradiation on the magneto-elastic properties of a Ni/Fe multi-layered stack. The progressive intermixing caused by He+ irradiation at the interfaces of the multilayer allows us to tune the saturation magnetostriction value with increasing He+ fluences and even to induce a reversal of the sign of the magnetostrictive effect. Additionally, the critical fluence at which the absolute value of the magnetostriction is dramatically reduced is identified. Therefore, insensitivity to strain of the magnetic stack is nearly reached, as required for many applications. All the above-mentioned effects are attributed to the combination of the negative saturation magnetostriction of sputtered Ni and Fe layers and the positive magnetostriction of the NixFe1-x alloy at the intermixed interfaces, whose contribution is gradually increased with irradiation. Importantly, the irradiation does not alter the layer polycrystalline structure, confirming that post-growth He+ ion irradiation is an excellent tool to tune the magneto-elastic properties of multilayer samples. An alternative class of spintronic devices can be envisioned with a material treatment able to arbitrary change the magnetostriction with ion-induced "magnetic patterning. "
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Accepted version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: In Copyright
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Journal: Applied physics letters
Pages or article number: 182401
Publisher: American Inst. of Physics
Publisher place: Melville, NY
Issue date: 2022
ISSN: 0003-6951
Publisher DOI: 10.1063/5.0107942
Appears in collections:JGU-Publikationen

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