Origin of room temperature d{sup 0} ferromagnetism and characteristic photoluminescence in pristine SnO{sub 2} nanowires: A correlation

Journal Article · Wed Feb 15 04:00:00 EST 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.11.038· OSTI ID:21612923

Ghosh, S; Mandal, Kalyan ^[1]

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1. Department of Material Sciences, S.N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake City, Kolkata 700098, West Bengal (India)

Arrays of SnO{sub 2} nanowires are fabricated by employing a wet chemical template assisted sol-gel route using ordered nanoporous anodic aluminium oxide as the host. The origin of room temperature d{sup 0} ferromagnetism in pristine polycrystalline SnO{sub 2} nanowires is investigated by correlating photoluminescence and electron paramagnetic resonance (EPR) studies. It has been found that the naturally grown structural defects of oxygen vacancies namely singly ionised oxygen vacancy (V{sub O}{sup {center_dot}}) clusters induce the characteristic photoluminescence and contribute in ferromagnetism of pristine SnO{sub 2} nanowires at room temperature. The presence of the V{sub O}{sup {center_dot}} structural defects in the pure SnO{sub 2} nanowires is also assured by the EPR spectroscopy. Present study will help understand the puzzle about the unexpected magnetic phenomenon in these undoped wide band gap oxide semiconductors. Highlights: Black-Right-Pointing-Pointer SnO{sub 2} NWs are fabricated by wet chemical AAO template assisted route. Black-Right-Pointing-Pointer SnO{sub 2} NWs exhibit d{sup 0} ferromagnetism at room temperature. Black-Right-Pointing-Pointer Origin of ferromagnetism is correlated with photoluminescence and EPR studies. Black-Right-Pointing-Pointer Oxygen vacancy clusters are attributed to boost ferromagnetism in SnO{sub 2} NWs.

• OSTI ID: 21612923
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 186; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CRYSTALS
DEFECTS
ELEMENTS
EMISSION
FERROMAGNETISM
LUMINESCENCE
MAGNETISM
MATERIALS
NANOSTRUCTURES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOLUMINESCENCE
PHOTON EMISSION
POLYCRYSTALS
QUANTUM WIRES
SEMICONDUCTOR MATERIALS
SOL-GEL PROCESS
SPECTROSCOPY
TIN COMPOUNDS
TIN OXIDES