Kumari, Latha and Subramanyam, SV (2006) Magnetoresistance and magnetic field induced metal–insulator transition in intercalated amorphous carbon. In: Materials Science and Engineering: B, 129 (1-3). pp. 48-53.
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Abstract
In this work, we discuss the preparation of iodine and sulfur incorporated amorphous carbon (a-C) films by vapor phase pyrolysis technique. Iodine incorporated a-C films depict an unusual resistivity behavior at low temperatures, where a clear positive temperature coefficient (PTCR) is witnessed, which also depicts a pyrolysis temperature and iodine incorporation induced metal–insulator (M–I) transition. Magnetic field induced M–I transition is also observed in iodinated samples. Magnetoresistance measurements performed on these films from 1.3–10 K in the presence of magnetic field (0–7 T) account for a positive magnetoresistance irrespective of the regimes they fall in. Universal scaling of magnetoconductance observed in intercalated a-C system depicts the dominance of electron–electron interaction.
Item Type: | Journal Article |
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Publication: | Materials Science and Engineering: B |
Publisher: | Elsevier |
Additional Information: | Copyright of this article belongs to Elsevier. |
Keywords: | Amorphous carbon;Electrical properties;Metal–insulator transition;Magnetoresistance |
Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
Date Deposited: | 16 May 2006 |
Last Modified: | 19 Sep 2010 04:26 |
URI: | http://eprints.iisc.ac.in/id/eprint/6685 |
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