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Magnetoresistance of polyaniline doped by AMPSA

Menon, Raghu and Mukherjee, AK (2001) Magnetoresistance of polyaniline doped by AMPSA. In: Synthetic Metals, 119 (1-3). pp. 427-428.

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Free standing films (~60 μm thick) of polyaniline (PANI) doped with 2-acryloamino-2-methyl-1-propanesulfonic acid(AMPSA) are prepared by the solution casting method [1]. PANI-AMPSA shows a positive temperature coefficient of resistivity (TCR) down to 80 K, and at T<80 K it becomes negative. An anisotropic magnetoconductance (MC) has been observed in 3D isotropic samples of PANI-AMPSA. The sign of the transverse magnetoconductance (MC) is positive at 4.2 and 2.6 K. The longitudinal MC is negative at T<6 K. The longitudinal MC (negative) increases rapidly (nearly 10%) at T<2 K. This behavior of MC shows the interplay of weak localization (WL) and electron-electron (e-e) interaction and hopping contributions in 3D isotropic samples of PANI AMPSA

Item Type: Journal Article
Publication: Synthetic Metals
Publisher: Elsevier
Additional Information: Copyright of this article belongs to Elsevier
Keywords: polyaniline;conductivity;magnetoresistance
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 23 Aug 2007
Last Modified: 19 Sep 2010 04:36
URI: http://eprints.iisc.ac.in/id/eprint/10433

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