Kuerbanjiang, B, Love, C, Kepaptsoglou, D 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, 748. pp. 323-327. ISSN 0925-8388
Abstract
We present a magnetic and structural properties study of epitaxially grown B2-ordered full Heusler Co 2 FeSi 0.5 Al 0.5 single crystal films on Ge(111) substrates, as a function of annealing temperature. Hysteresis loop measurements reveal that the magnetic properties of Co 2 FeSi 0.5 Al 0.5 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 Co 2 FeSi 0.5 Al 0.5 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. This is an author produced version of a paper published in Journal of Alloys and Compounds. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 Apr 2018 11:26 |
Last Modified: | 07 Mar 2019 01:39 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jallcom.2018.03.075 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:129722 |