Spin transport in benzofurane bithiophene based organic spin valves

Mathieu Palosse 1 Isabelle Séguy 2 Eléna Bedel-Pereira 3 Christina Villeneuve-Faure 4 Charlotte Mallet 5 Pierre Frère 5 Bénédicte Warot-Fonrose 6 Nicolas Biziere 6 Jean-François Bobo 6
1 LAAS-MICA - Équipe MICrosystèmes d'Analyse
LAAS - Laboratoire d'analyse et d'architecture des systèmes
2 LAAS - Laboratoire d'analyse et d'architecture des systèmes
3 LAAS-MPN - Équipe Matériaux et Procédés pour la Nanoélectronique
LAAS - Laboratoire d'analyse et d'architecture des systèmes
4 LAPLACE - LAboratoire PLasma et Conversion d'Energie
5 MOLTECH-ANJOU - Institut des Sciences et Technologies Moléculaires d'Angers
6 CEMES - Centre d'élaboration de matériaux et d'études structurales
Abstract : In this paper we present spin transport in organic spin-valves using benzofurane bithiophene (BF3) as spacer layer between NiFe and Co ferromagnetic electrodes. The use of an AlO x buffer layer between the top electrode and the organic layer is discussed in terms of improvements of stacking topology, electrical transport and oxygen contamination of the BF3 layer. A study of magnetic hysteresis cycles evidences spin-valve behaviour. Transport properties are indicative of unshorted devices with non-linear I-V characteristics. Finally we report a magnetoresistance of 3% at 40 K and 10 mV in a sample with a 50 nm thick spacer layer, using an AlO x buffer layer.
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CEMES | INC-CNRS | LAAS-MICRO-NANO-BIO-TECHNOLOGIES | LAAS-MPN | LAAS-MICA | INSA-GROUPE | LAAS | INSA-TOULOUSE | UNIV-ANGERS | CNRS | UNIV-TLSE3 | UT1-CAPITOLE | UNIV-TLSE2 | IRD

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Mathieu Palosse, Isabelle Séguy, Eléna Bedel-Pereira, Christina Villeneuve-Faure, Charlotte Mallet, et al.. Spin transport in benzofurane bithiophene based organic spin valves. AIP Advances, American Institute of Physics- AIP Publishing LLC, 2014, 4 (1), pp.017117. ⟨10.1063/1.4862675⟩. ⟨hal-01707035⟩

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