Effects of conjugated polymer on the magnetotransport properties in La0.7Sr0.3MnO3 ferromagnetic electrodes

Markus Pesonen, S Majumdar, H Huhtinen, P Paturi, HS Majumdar, Ronald Österbacka

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    Magnetotransport of La0.7Sr0.3MnO3 (LSMO)/regioregular poly3-hexylthiophene (rr-P3HT) interfaces were studied at 5-300 K to gain insight of spin transport in polymer coated LSMO. LSMO films on SrTiO3 (STO), MgO, and quartz substrates were characterized in pristine state, after depositing rr-P3HT and after removing rr-P3HT. Application and removal of rr-P3HT caused the disappearance of colossal magneto resistance and the emerging of low-field magnetoresistance (LFMR) in STO/LSMO, while the same treatment on MgO and quartz showed only a large LMFR signal with no significant changes during application and removal of rr-P3HT. This result signifies that epitaxial thin films of LSMO do not maintain their transport characteristics when coated with organic semiconductors, posing a limitation for efficient spin polarized injection at such interfaces. Copyright 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4800907]
    Original languageUndefined/Unknown
    Pages (from-to)
    Number of pages8
    JournalAIP Advances
    Volume3
    Issue number4
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

    Keywords

    • colossal magnetoresistance
    • conducting polymers
    • ferromagnetic materials
    • interface magnetism
    • lanthanum compounds
    • magnetic epitaxial layers
    • organic semiconductors
    • semiconductor-insulator boundaries
    • spin polarised transport
    • strontium compounds

    Cite this