1. Ferromagnetism at Room Temperature on Electrodeposited Co2+-Doped ZnO Thin Film
- Author
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Abid, M, Abid, JP, and Ansermet, JP
- Subjects
Condensed Matter::Materials Science ,Condensed Matter::Superconductivity ,Physics::Atomic and Molecular Clusters ,Condensed Matter::Strongly Correlated Electrons - Abstract
Predicted by the theory, ferromagnetism is expected in Co-doped ZnO. Recently, ferromagnetism above room temperature was reported in thin films as well as in bulk samples made of cobalt-doped zinc oxide. In this study, we report the preparation of ZnO doped with 5% of Co Zn1−xCoxO, x = 0.05 by electrodeposition. Sample characterization using X-ray diffraction, highresolution transmission electron microscopy, and X-ray photoelectron spectroscopy shows that the dopant is substitutional. Moreover, the magnetic properties of Co-doped ZnO samples electrodeposited as a function of field and temperature exhibit clearly ferromagnetism with Curie temperature above 400 K.