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Charge and spin dynamics in VO2 nanorods

Authors
Lee, Kyu WonKweon, HyocheonPark, JitaeLee, Cheol Eui
Issue Date
8-6월-2009
Publisher
AMER INST PHYSICS
Keywords
nanostructured materials; nanotechnology; photoconductivity; spin dynamics; spin polarised transport; vanadium compounds
Citation
APPLIED PHYSICS LETTERS, v.94, no.23
Indexed
SCIE
SCOPUS
Journal Title
APPLIED PHYSICS LETTERS
Volume
94
Number
23
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/119835
DOI
10.1063/1.3152780
ISSN
0003-6951
Abstract
Electrical conductivity and photoconductivity measurements were carried out on vanadium dioxide (VO2) nanorods prepared by the hydrothermal treatment of vanadium pentoxide gels. While the structural properties of the nanorods resembled those of the Cr-doped VO2, the charge and spin dynamics appears to resemble those of the Nb-doped VO2. The magnetic and (photo)electrical properties of the nanorods can be understood in terms of localization of itinerant electrons giving rise to a spin-polarized (S=3/2) V4+ pair, dominant at higher temperatures, or to a (S=1) V3+ ion out of a V4+ ion pair, dominant at lower temperatures.
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