Frequency dependence of organic magnetoresistance

W. Wagemans, Paul Janssen, E.H.M. van der Heijden, M. Kemerink, B. Koopmans

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)
117 Downloads (Pure)

Abstract

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.
Original languageEnglish
Article number123301
Pages (from-to)123301-1/3
Number of pages3
JournalApplied Physics Letters
Volume97
Issue number12
DOIs
Publication statusPublished - 2010

Fingerprint

Dive into the research topics of 'Frequency dependence of organic magnetoresistance'. Together they form a unique fingerprint.

Cite this