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Competing magnetic effects due to the incorporation of oxygen in thin films of (ZnCo)O.
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.
Afiliación
  • Saeedi AMA; Department of Physics and Astronomy, University of Sheffield Hicks Building S3 7RH UK g.gehring@shef.ac.uk.
  • Gerriu FM; Department of Physics, Umm Al-Qura University P.O.Box 715 Makkah 21421 Saudi Arabia.
  • Ying M; Department of Physics and Astronomy, University of Sheffield Hicks Building S3 7RH UK g.gehring@shef.ac.uk.
  • Alshammari MS; Department of Physics, Misurata University Libya.
  • Heald SM; Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University Beijing 100875 China.
  • Li X; The National Centre for Laser and Optoelectronics, King Abdulaziz City for Science and Technology, KACST P.O. Box 6086 Riyadh 11442 Saudi Arabia.
  • Blythe HJ; Advanced Photon Source, Argonne National Laboratory Argonne IL 60439 USA.
  • Fox AM; Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal University Linfen 041004 People's Republic of China.
  • Gehring GA; Department of Physics and Astronomy, University of Sheffield Hicks Building S3 7RH UK g.gehring@shef.ac.uk.
RSC Adv ; 9(65): 38001-38010, 2019 Nov 19.
Article en En | MEDLINE | ID: mdl-35541797
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. 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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: RSC Adv Año: 2019 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: RSC Adv Año: 2019 Tipo del documento: Article Pais de publicación: Reino Unido