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Title: Competing magnetic effects due to the incorporation of oxygen in thin films of (ZnCo)O

Abstract

We have investigated the magnetic properties of ZnCoO thin films grown by pulsed laser deposition from targets made from pure ZnO combined with metallic Co, CoO or Co3O4 as a function of oxygen pressure in the deposition chamber. We find that the structural and magnetic properties of films grown from targets containing CoO or Co3O4 are similar and can be mapped on to each other by assuming that the films made from CoO require some additional oxygen to make them the same as those grown from Co3O4. The data suggest that the magnetism in these films is due to oxygen vacancies. Radically different properties are seen for the films grown with metallic Co in the target. In this case, there is structural evidence for the production of Zn vacancies as oxygen was added during deposition and this was accompanied by a strong increase of the magnetisation. Finally, in contrast, there was very little difference seen between the magnetic properties of the targets, which were all found to be paramagnetic, even after further annealing in air.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3];  [4];  [5];  [6];  [7];  [7]; ORCiD logo [7]
+ Show Author Affiliations
  1. Univ. of Sheffield (United Kingdom); Umm Al-Qura Univ., Makkah (Saudi Arabia)
  2. Univ. of Sheffield (United Kingdom); Misurata Univ., Misurata (Libya)
  3. Beijing Normal Univ., Beijing (China)
  4. King Abdulaziz City for Science and Technology (KACST), Riyadh (Saudi Arabia)
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  6. Shanxi Normal Univ., Linfen (China)
  7. Univ. of Sheffield (United Kingdom)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Natural Science Foundation of China (NNSFC); Canadian Light Source
OSTI Identifier:
1607388
Grant/Contract Number:  
AC02-06CH11357; 11875088; 11675280
Resource Type:
Accepted Manuscript
Journal Name:
RSC Advances
Additional Journal Information:
Journal Volume: 9; Journal Issue: 65; Journal ID: ISSN 2046-2069
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Saeedi, Ahmad M. A., Gerriu, Fatma M., Ying, Minju, Alshammari, Marzook S., Heald, Steve M., Li, Xiaoli, Blythe, Harry J., Fox, A. Mark, and Gehring, Gillian A. Competing magnetic effects due to the incorporation of oxygen in thin films of (ZnCo)O. United States: N. p., 2019. Web. doi:10.1039/c9ra06899f.
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Saeedi, Ahmad M. A., Gerriu, Fatma M., Ying, Minju, Alshammari, Marzook S., Heald, Steve M., Li, Xiaoli, Blythe, Harry J., Fox, A. Mark, & Gehring, Gillian A. Competing magnetic effects due to the incorporation of oxygen in thin films of (ZnCo)O. United States. doi:https://doi.org/10.1039/c9ra06899f
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Saeedi, Ahmad M. A., Gerriu, Fatma M., Ying, Minju, Alshammari, Marzook S., Heald, Steve M., Li, Xiaoli, Blythe, Harry J., Fox, A. Mark, and Gehring, Gillian A. Thu . "Competing magnetic effects due to the incorporation of oxygen in thin films of (ZnCo)O". United States. doi:https://doi.org/10.1039/c9ra06899f. https://www.osti.gov/servlets/purl/1607388.
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@article{osti_1607388,
title = {Competing magnetic effects due to the incorporation of oxygen in thin films of (ZnCo)O},
author = {Saeedi, Ahmad M. A. and Gerriu, Fatma M. and Ying, Minju and Alshammari, Marzook S. and Heald, Steve M. and Li, Xiaoli and Blythe, Harry J. and Fox, A. Mark and Gehring, Gillian A.},
abstractNote = {We have investigated the magnetic properties of ZnCoO thin films grown by pulsed laser deposition from targets made from pure ZnO combined with metallic Co, CoO or Co3O4 as a function of oxygen pressure in the deposition chamber. We find that the structural and magnetic properties of films grown from targets containing CoO or Co3O4 are similar and can be mapped on to each other by assuming that the films made from CoO require some additional oxygen to make them the same as those grown from Co3O4. The data suggest that the magnetism in these films is due to oxygen vacancies. Radically different properties are seen for the films grown with metallic Co in the target. In this case, there is structural evidence for the production of Zn vacancies as oxygen was added during deposition and this was accompanied by a strong increase of the magnetisation. Finally, in contrast, there was very little difference seen between the magnetic properties of the targets, which were all found to be paramagnetic, even after further annealing in air.},
doi = {10.1039/c9ra06899f},
journal = {RSC Advances},
number = 65,
volume = 9,
place = {United States},
year = {2019},
month = {11}
}
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DOI:  https://doi.org/10.1039/c9ra06899f
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