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 Sep 9 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Electron spin resonance of defect-rich vanadium oxide nanotubes. / Won Lee, Kyu; Kweon, Hyocheon; Lee, Cheol Eui.
In: Journal of Applied Physics, Vol. 106, No. 4, 044313, 09.09.2009.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electron spin resonance of defect-rich vanadium oxide nanotubes
AU - Won Lee, Kyu
AU - Kweon, Hyocheon
AU - Lee, Cheol Eui
PY - 2009/9/9
Y1 - 2009/9/9
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=69749088090&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=69749088090&partnerID=8YFLogxK
U2 - 10.1063/1.3208066
DO - 10.1063/1.3208066
M3 - Article
VL - 106
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 4
M1 - 044313
ER -