Abstract
A weak near-infrared luminescence has been observed for fine-particle Fe2O3 when excited by 1064 nm radiation from a Nd:YAG laser. There are three broad luminescence peaks at 7994, 7225 and 6686 cm- 1, with intensities about 10 times that of the Raman scattering. The relative intensities vary with particle morphology and with heat treatment. Overall band intensities increase by about a factor of 10 for Fe2O3 that has been heated to 500 °C and the decreases again for material that has been heated to 1000 °C. The emission was assigned to the 4T1g→6A1g crystal field transition of octahedral Fe3+. A large Stokes shift is associated with these transitions.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2013-2016 |
| Number of pages | 4 |
| Journal | Materials Letters |
| Volume | 60 |
| Issue number | 16 |
| DOIs | |
| State | Published - Jul 2006 |
All Science Journal Classification (ASJC) codes
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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