Defect engineered d{sup 0} ferromagnetism in tin-doped indium oxide nanostructures and nanocrystalline thin-films

Journal Article · Fri Aug 21 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4928952· OSTI ID:22494764

Sarkar, Ayan ^[1]; Ghosh, Shyamsundar ^[2]; Mandal, Guruprasad; Mukherjee, Goutam Dev ^[3]; Manju, Unnikrishnan ^[4]; Banu, Nasrin; Dev, Bhupendra Nath ^[5]

---

1. Centre for Research in Nanoscience and Nanotechnology, University of Calcutta, Technology Campus, Block JD-2, Sector III, Salt Lake City, Kolkata 700 098 (India)
2. Department of Physics, Bejoy Narayan Mahavidyalaya, P.O. Itachuna, Hooghly 712 147 (India)
3. Department of Physical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur Campus, BCKV Campus Main Office, Nadia 741 252 (India)
4. Materials Characterization Division, CSIR-Central Glass and Ceramic Research Institute, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032 (India)
5. Department of Material Science, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032 (India)

Origin of unexpected defect engineered room-temperature ferromagnetism observed in tin-doped indium oxide (ITO) nanostructures (Nanowires, Nano-combs) and nanocrystalline thin films fabricated by pulsed laser deposition has been investigated. It is found that the ITO nanostructures prepared under argon environment exhibit strongest ferromagnetic signature as compared to that nanocrystalline thin films grown at oxygen. The evidence of singly ionized oxygen vacancy (V{sub 0}{sup +}) defects, obtained from various spectroscopic measurements, suggests that such V{sub 0}{sup +} defects are mainly responsible for the intrinsic ferromagnetic ordering. The exchange interaction of the defects provides extensive opportunity to tune the room-temperature d{sup 0} ferromagnetism and optical properties of ITOs.

• OSTI ID: 22494764
• Journal Information: Journal of Applied Physics, Vol. 118, Issue 7; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ARGON
CRYSTALS
DEFECTS
DOPED MATERIALS
ENERGY BEAM DEPOSITION
EXCHANGE INTERACTIONS
FERROMAGNETISM
INDIUM OXIDES
LASER RADIATION
NANOWIRES
OPTICAL PROPERTIES
OXYGEN
PULSED IRRADIATION
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
TIN
VACANCIES