Magnetic properties of Fe catalysts included in carbon nanotubes

Jae Won Jang, Kyu Won Lee, Cheol Eui Lee, Tae Jae Lee, Cheol Jin Lee, Seung Chul Lyu

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We have synthesized multiwalled carbon nanotubes (MWNTs) including Fe catalysts by the vapor phase growth method at 950°C. Different Fe concentrations were obtained by varying the Ar and CO flow rates during the vapor phase growing of the MWNTs. Magnetic properties of the MWNTs with different Fe concentrations were characterized by means of SQUID measurements in the temperature range of 5-300 K. As a result, superparamagnetic behaviors were observed at all the Fe concentrations. The form of the Fe catalysts included in MWNTs was discussed in view of the change of the average magnetic moment and the number of Fe particles with changing Fe concentration.

Original languageEnglish
Pages (from-to)1605-1608
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume241
Issue number7
DOIs
Publication statusPublished - 2004 Jun

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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