Influence of Substrate on the Transportation Properties of Co/Alq3 Granular Films on a Si Wafer |
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| Authors: | ZHANG Yan SHENG Peng LIU Wen-Ming SHU Qi GU Zhi-Hua NI Gang |
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| Affiliation: | Department of Optical Science and Engineering, Fudan University, Shanghai 200433 Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200433 Laboratory of Advanced Materials, Fudan University, Shanghai 200433 |
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| 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. |
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| Keywords: | 81 07 Pr 75 47 -m 72" target="_blank">')"> 72 20 My |
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