Tailoring the coercivity in ferromagnetic ZnO thin films by 3d and 4f elements codoping

Journal Article · Mon Jan 06 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4861165· OSTI ID:22257136

Lee, J. J.; Yi, J. B.; Li, S. ^[1]; Chen, T. ^[2]; Ionescu, M. ^[3]

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1. School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052 (Australia)
2. Department of Physics, The Chinese University of Hong Kong, Shatin (Hong Kong)
3. Australian Nuclear Science and Technology Organization, Sydney, New South Wales 2234 (Australia)

Cluster free, Co (3d) and Eu (4f) doped ZnO thin films were prepared using ion implantation technique accompanied by post annealing treatments. Compared with the mono-doped ZnO thin films, the samples codoped with Co and Eu exhibit a stronger magnetization with a giant coercivity of 1200 Oe at ambient temperature. This was further verified through x-ray magnetic circular dichroism analysis, revealing the exchange interaction between the Co 3d electrons and the localized carriers induced by Eu{sup 3+} ions codoping. The insight gained with modulating coercivity in magnetic oxides opens up an avenue for applications requiring non-volatility in spintronic devices.

• OSTI ID: 22257136
• Journal Information: Applied Physics Letters, Vol. 104, Issue 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COERCIVE FORCE
DOPED MATERIALS
EUROPIUM IONS
ION IMPLANTATION
MAGNETIC CIRCULAR DICHROISM
THIN FILMS
ZINC OXIDES