Abstract
We have studied defect-rich vanadium oxide nanotubes, with reduced V 4+ concentration, by means of x-ray diffraction, infrared spectroscopy, x-ray photoemission spectroscopy, and electron spin resonance (ESR) measurements. In particular, prominent anomalies at 320 and 370 K attributed to structural phase transitions were manifest in the ESR measurements. The ESR spin susceptibility exhibited a singlet-triplet transition of the spin dimers and an antiferromagnetic exchange coupling. In the high-temperature region above 370 K, where the two distinct ESR lines merged, an activation energy of the fast hopping polaron motion, 0.48 eV, was obtained.
| Original language | English |
|---|---|
| Article number | 044313 |
| Journal | Journal of Applied Physics |
| Volume | 106 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2009 |
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Won Lee, K., Kweon, H., & Lee, C. E. (2009). Electron spin resonance of defect-rich vanadium oxide nanotubes. Journal of Applied Physics, 106(4), [044313]. https://doi.org/10.1063/1.3208066