Kuerbanjiang, Balati orcid.org/0000-0001-6446-8209, Love, Christopher, Kepaptsoglou, Demie orcid.org/0000-0003-0499-0470 et al. (7 more authors) (2018) Effect of annealing on the structure and magnetic properties of Co2FeAl0.5Si0.5 thin films on Ge(111). JOURNAL OF ALLOYS AND COMPOUNDS. ISSN 0925-8388
Abstract
Abstract We present a magnetic and structural properties study of epitaxially grown B2-ordered full Heusler Co2FeSi0.5Al0.5 single crystal films on Ge(111) substrates, as a function of annealing temperature. Hysteresis loop measurements reveal that the magnetic properties of Co2FeSi0.5Al0.5 are stable up to 450 °C while ferromagnetic resonance linewidth measurements show a reduction of Gilbert damping from 5.6 × 10−3 to 2.9 × 10−3 for as-grown and annealed film, respectively. Above 500 °C, the films have increased coercivity, decreased saturation magnetisation, and show characteristic two-magnon scattering resonance line-shapes. Magnetic inhomogeneities developed within the film when annealed above 500 °C were correlated to significant interdiffusion at the film-substrate interface, as confirmed by scanning transmission electron microscopy and electron energy loss spectroscopy. By performing first-principles calculations based on atomistic models developed from atomically-resolved microscopy images, we show the magnetic moment of the Co2FeSi0.5Al0.5 film reduces upon Co substitution by Ge atoms.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Elsevier B.V. All rights reserved. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 13 Mar 2018 11:50 |
Last Modified: | 26 Jan 2025 00:11 |
Published Version: | https://doi.org/10.1016/j.jallcom.2018.03.075 |
Status: | Published online |
Refereed: | Yes |
Identification Number: | 10.1016/j.jallcom.2018.03.075 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:128493 |
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