Journal
CHEMICAL PHYSICS LETTERS
Volume 457, Issue 4-6, Pages 347-351Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2008.04.019
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Capillary effect was used to fill double wall carbon nanotubes ( DWCNT) with iron. The samples are characterized by Mossbauer and Raman spectroscopies, TEM, SAED, and magnetization. The experimental results indicate the presence of alpha-Fe nanowires inside the DWCNTs. The samples are ferromagnetic at room temperature. There are three striking results due to the confinement effects on the physical behavior of alpha-Fe: the hyperfine fields increase, the Debye temperature decreases and Raman modes are observed. (c) 2008 Elsevier B. V. All rights reserved.
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