| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
|
|
|
|
Influence of Substrate on the Transportation Properties of Co/Alq3 Granular Films on a Si Wafer |
ZHANG Yan1,2, SHENG Peng1,2, LIU Wen-Ming1,2, SHU Qi3, GU Zhi-Hua3, NI Gang1,2 |
| 1Department of Optical Science and Engineering, Fudan University, Shanghai 200433 2Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200433 3Laboratory of Advanced Materials, Fudan University, Shanghai 200433 |
|
| Cite this article: |
|
ZHANG Yan, SHENG Peng, LIU Wen-Ming et al 2010 Chin. Phys. Lett. 27 078102 |
|
|
|
|
Abstract A series of Co0.48(Alq3)0.52 granular films were deposited on silicon substrates using the co-evaporating technique. A crossover of magnetoresistance (MR) from negative to positive was observed in the samples, due to conducting channel switching. The transport properties of samples are greatly influenced by hydrofluoric acid pretreatment, as a result, positive MR decreases drastically and the temperature dependence of resistance changes a lot near room temperature. The result indicates that the native oxide layer plays an important role in the transport mechanism. Moreover, different resistivities of Si substrates influence the current distribution of conducting channels, leading to different transport behaviors accordingly.
|
| Keywords:
81.07.Pr
75.47.-m
72.20.My
|
|
|
Received: 03 February 2010
Published: 28 June 2010
|
|
| PACS: |
81.07.Pr
|
(Organic-inorganic hybrid nanostructures)
|
| |
75.47.-m
|
(Magnetotransport phenomena; materials for magnetotransport)
|
| |
72.20.My
|
(Galvanomagnetic and other magnetotransport effects)
|
|
|
|
|
|
[1] Tang J K et al 2002 J. Appl. Phys. 91 8411
[2] Wang H et al 2008 New J. Phys. 10 093006
[3] Branford W R et al 2004 Appl. Phys. Lett. 84 2358
[4] Li M F et al 1999 J. Magn. Magn. Mater. 196-197 31
[5] Witanachchi S et al 2006 J. Appl. Phys. 99 073710
[6] Delmo M P et al 2009 Nature 457 1112
[7] Schoonus J et al 2008 Phys. Rev. Lett. 100 127202
[8] Xiong Z H et al 2004 Nature 427 821
[9] Drew A J et al 2009 Nature Mater. 8 109
[10] Pramanik S et al 2007 Nature Nanotech. 2 216
[11] Shu Q et al 2009 Chin. Phys. Lett. 26 077505
[12] Sheng P et al 1973 Phys. Rev. Lett. 31 44
[13] Dai J et al 2000 J. Phys. D 33 L65
[14] Witanachchi S et al 2007 Appl. Phys. Lett. 90 052102
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
