Electron spin resonance of defect-rich vanadium oxide nanotubes

Kyu Won Lee, Hyocheon Kweon, Cheol Eui Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

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 languageEnglish
Article number044313
JournalJournal of Applied Physics
Volume106
Issue number4
DOIs
Publication statusPublished - 2009 Sep 9

Fingerprint

vanadium oxides
nanotubes
electron paramagnetic resonance
defects
resonance lines
x ray diffraction
photoelectric emission
infrared spectroscopy
dimers
anomalies
activation energy
magnetic permeability
spectroscopy
x rays

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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 journalArticle

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