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

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.
Authors:
; ; ;  [1] ;  [2] ;  [3]
  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)
Publication Date:
OSTI Identifier:
22257136
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COERCIVE FORCE; DOPED MATERIALS; EUROPIUM IONS; ION IMPLANTATION; MAGNETIC CIRCULAR DICHROISM; THIN FILMS; ZINC OXIDES