Intrinsic and Extrinsic Ferromagnetism in Co-Doped Indium Tin Oxide Revealed Using X-Ray Magnetic Circular Dichroism

Autor: A. M. H. R. Hakimi, F. Schoofs, M. G. Blamire, S. Langridge, S. S. Dhesi
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Advances in Condensed Matter Physics, Vol 2017 (2017)
Druh dokumentu: article
ISSN: 1687-8108
1687-8124
DOI: 10.1155/2017/2836254
Popis: The effects of high-temperature annealing on ferromagnetic Co-doped Indium Tin Oxide (ITO) thin films have been investigated using X-ray diffraction (XRD), magnetometry, and X-Ray Magnetic Circular Dichroism (XMCD). Following annealing, the magnetometry results indicate the formation of Co clusters with a significant increase in the saturation magnetization of the thin films arising from defects introduced during cluster formation. However, sum rule analysis of the element-specific XMCD results shows that the magnetic moment at the Co sites is reduced after annealing. The effects of annealing demonstrate that the ferromagnetism observed in the as-deposited Co-doped ITO films arises from intrinsic defects and cannot be related to the segregation of metallic Co clusters.
Databáze: Directory of Open Access Journals
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