Ferromagnetic order in aged Co-doped TiO2 anatase nanopowders

Details Ferromagnetic order in aged Co-doped TiO2 anatase nanopowders Ferromagnetic order in aged Co-doped TiO2 anatase nanopowders

2010-09-23

arxiv.org/abs/1009.4671v1

Physics

Condensed Matter

Materials Science

15 pages, 5 figures

Scientific paper

Oxide based diluted magnetic semiconductor (DMS) materials have been a subject of increasing interest due to reports of room temperature ferromagnetism in several systems and their potential use in the development of spintronic devices. However, concerns on the stability of the magnetic properties of different DMS systems have been raised. Their magnetic moment is often unstable, vanishing with a characteristic decay time of weeks or months, which precludes the development of real applications. This paper reports on the ferromagnetic properties of two-year-aged Ti1-xCoxO2-{\delta} reduced anatase nanopowders with different Co contents (0.03

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