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Frequency dependence of organic magnetoresistance
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.ORCID iD: 0000-0002-7104-7127
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2010 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 97, no 12, 123301Article in journal (Refereed) Published
Abstract [en]

To identify the microscopic mechanisms of organic magnetoresistance (OMAR), the dependency on the frequency of the applied magnetic field is explored, which consists of a dc and ac component. The measured magnetoconductance decreases when the frequency is increased. The decrease is stronger for lower voltages, which is shown to be linked to the presence of a negative capacitance, as measured with admittance spectroscopy. The negative capacitance disappears when the frequency becomes comparable to the inverse transit time of the minority carriers. These results are in agreement with recent interpretations that magnetic field effects on minority carrier mobility dominate OMAR. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3491217]

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2010. Vol. 97, no 12, 123301
Keyword [en]
carrier mobility; electrical conductivity; magnetoresistance; minority carriers
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-141473DOI: 10.1063/1.3491217ISI: 000282124700059OAI: oai:DiVA.org:liu-141473DiVA: diva2:1145713
Note

Funding Agencies|Dutch Technology Foundation (STW) via the NWO VICI [06628]

Available from: 2017-09-29 Created: 2017-09-29 Last updated: 2017-10-06

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Kemerink, M.
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