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Thin film growth of delafossite-related derivative β-NaFeO2 on a ZnO layer by pulsed laser deposition.

Thin film growth of delafossite-related derivative β-NaFeO2 on a ZnO layer by pulsed laser deposition.
Thin film growth of delafossite-related derivative β-NaFeO2 on a ZnO layer by pulsed laser deposition.
Despite the fact there is a plethora of magnetic delafossite compounds in the bulk polycrystalline phase, so far,only a few of them have been fabricated as thin films. The challenges in the fabrication of delafossite thin films are imposed by the phase purity and stability of the composition related with the preparation conditions. Here we report the growth of a new delafossite related derivative thin film, a sodium iron oxide of the β-NaFeO2 phase, grown on a ZnO seed layer by pulsed laser deposition, using as target a single phase polycrystalline powder of β-NaFeO2. The purity of the thin films has been verified with X-ray diffraction, Scanning electron and Atomic Force Microscopy as well as Fourier Transform Infrared Spectroscopy. The crucial parameter for the growth of the thin films has been the partial oxygen pressure, as the β-NaFeO2 is obtained at 2 Pa. Applying
higher or lower pressures resulted in the formation the hematite and maghemite iron oxides as secondary phases, as indicated by X-ray diffraction patterns. SEM and AFM studies confirm a good two dimensional growth for the pure phase β-NaFeO2, whereas FT-IR measurements revealed characteristic β-ΝaFeO2 bands.
0040-6090
424-430
Bakaimi, Ioanna
3c4e7000-517c-41fa-84db-c45641125e4d
Papadopoulou, Evie L.
2cbeb041-2735-4b21-b191-faf734e10423
Kenanakis, Georgios
d0bcd922-d103-4463-b882-609b2f618ec3
Spanakis, Emmanouel
0662d7e8-2c99-4be7-a97c-5858628f1fb9
Lappas, Alexandros
288ab488-575c-4aff-bf9a-c5b3188c1363
Bakaimi, Ioanna
3c4e7000-517c-41fa-84db-c45641125e4d
Papadopoulou, Evie L.
2cbeb041-2735-4b21-b191-faf734e10423
Kenanakis, Georgios
d0bcd922-d103-4463-b882-609b2f618ec3
Spanakis, Emmanouel
0662d7e8-2c99-4be7-a97c-5858628f1fb9
Lappas, Alexandros
288ab488-575c-4aff-bf9a-c5b3188c1363

Bakaimi, Ioanna, Papadopoulou, Evie L., Kenanakis, Georgios, Spanakis, Emmanouel and Lappas, Alexandros (2018) Thin film growth of delafossite-related derivative β-NaFeO2 on a ZnO layer by pulsed laser deposition. Thin Solid Films, 645, 424-430. (doi:10.1016/j.tsf.2017.11.022).

Record type: Article

Abstract

Despite the fact there is a plethora of magnetic delafossite compounds in the bulk polycrystalline phase, so far,only a few of them have been fabricated as thin films. The challenges in the fabrication of delafossite thin films are imposed by the phase purity and stability of the composition related with the preparation conditions. Here we report the growth of a new delafossite related derivative thin film, a sodium iron oxide of the β-NaFeO2 phase, grown on a ZnO seed layer by pulsed laser deposition, using as target a single phase polycrystalline powder of β-NaFeO2. The purity of the thin films has been verified with X-ray diffraction, Scanning electron and Atomic Force Microscopy as well as Fourier Transform Infrared Spectroscopy. The crucial parameter for the growth of the thin films has been the partial oxygen pressure, as the β-NaFeO2 is obtained at 2 Pa. Applying
higher or lower pressures resulted in the formation the hematite and maghemite iron oxides as secondary phases, as indicated by X-ray diffraction patterns. SEM and AFM studies confirm a good two dimensional growth for the pure phase β-NaFeO2, whereas FT-IR measurements revealed characteristic β-ΝaFeO2 bands.

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More information

Accepted/In Press date: 14 November 2017
e-pub ahead of print date: 15 November 2017
Published date: 1 January 2018

Identifiers

Local EPrints ID: 439502
URI: http://eprints.soton.ac.uk/id/eprint/439502
ISSN: 0040-6090
PURE UUID: 84a9986e-f8d5-49d4-8163-df53f888cea8
ORCID for Ioanna Bakaimi: ORCID iD orcid.org/0000-0002-8083-4413

Catalogue record

Date deposited: 24 Apr 2020 16:31
Last modified: 09 Jan 2022 03:56

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Contributors

Author: Ioanna Bakaimi ORCID iD
Author: Evie L. Papadopoulou
Author: Georgios Kenanakis
Author: Emmanouel Spanakis
Author: Alexandros Lappas

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