Room temperature positive magnetoresistance via charge trapping in polyaniline-iron oxide nanoparticle composites

Aigu L. Lin, Tao Wu, Wei Chen, Andrew T.S. Wee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We demonstrate a polyaniline-iron oxide nanoparticle (PANI-NP) organic hybrid composite device with room temperature positive magnetoresistance of 85.7%. Temperature dependent resistivity measurements attribute this observation to the decrease in localization length of the charge carriers in the presence of an external magnetic field which result in them being trapped within the device between the insulating PANI layer, hence allowing the device to maintain its resistive state even when the power is switched off, thus exhibiting a memory effect.

Original languageEnglish (US)
Article number032408
JournalApplied Physics Letters
Issue number3
StatePublished - Jul 15 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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