Translator Disclaimer
2 December 2008 Preparation and properties of hybrid bilayer structures based on organic Alq3, ferromagnetic La2/3Sr1/3MnO3 and Fe3O4
Author Affiliations +
Proceedings Volume 7142, Sixth International Conference on Advanced Optical Materials and Devices (AOMD-6); 71420V (2008) https://doi.org/10.1117/12.815942
Event: Sixth International Conference on Advanced Optical Materials and Devices, 2008, Riga, Latvia
Abstract
We report preparation and properties of hybrid bilayer structures composed of the organic semiconductor, 8-hydroxyquinoline aluminum (Alq3), p-type Si and two ferromagnetic oxides, namely, colossal magnetoresistance manganite, La2/3Sr1/3MnO3 (LSMO), and magnetite (Fe3O4). Thin Alq3 films were thermally evaporated in vacuum. The bottom LSMO films were grown in-situ at 750°C by dc magnetron sputtering on crystalline SrTiO3 while Fe3O4 films were magnetron sputtered at 400°C on glass. Current versus voltage in a case of vertical current flow has been investigated for the heterojunctions. The investigations revealed dominating role of thermoionic emission in a barrier of Schottky type for the Alq3/p-Si heterojunction while a mechanism based on carrier tunnelling through an interface and space charge limited current processes were considered to explain nonlinear electrical transport in the Alq3/LSMO, Alq3/ Fe3O4 heterojunctions. The Alq3/LSMO demonstrated magnetoresistance values up to 11 % (at T=240 K and B=1 T).
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
B. Vengalis, K. Šliužienė, I. Černiukė, R. Butkutė, V. Lisauskas, and A. Maneikis "Preparation and properties of hybrid bilayer structures based on organic Alq3, ferromagnetic La2/3Sr1/3MnO3 and Fe3O4", Proc. SPIE 7142, Sixth International Conference on Advanced Optical Materials and Devices (AOMD-6), 71420V (2 December 2008); https://doi.org/10.1117/12.815942
PROCEEDINGS
6 PAGES


SHARE
Advertisement
Advertisement
Back to Top