2010.06.07

工学部4号館1階 205セミナー室

Prof. Xiaozhong Zhang
       Department of Materials Science and Engineering,
       Tsinghua University and
       also National Center for Electron Microscopy


題目：A multifunctional spintronic material (Fe Co) C /Si

内容の概要説明：
We have made the C and Si hybrid material (Fe,Co)x-C1-x/Si which have positive MR of a few tens percentages at magnetic field of 5T and room temperature. The MR observed in these materials is mainly attributed to n-Si substrate. However, the p-n junction at C/Si interface also plays an important role. We also found that Fex-C1-x/Si sample shows a linear magnetic field dependent MR and the MR is not saturate up to 40T.
The positive and negative MR was observed in the Fex-C1-x/Si sample and the sign of MR is dependent on the orientation of magnetic field and bias voltage applied. The (Fe,Co)x-C1-x/Si have also some other novel physical properties, such as current or bias dependent MR, giant electroresistance, switch effect, photoconductivity, photovoltaic effect, pressure sensitivity and gas sensitivity. Study on this carbon base spintronic material may shed a light on developing a new kind of spintronic materials.

日時：2010年6月7日（月） 10:30 ～11:30

場所：東京大学工学部4号館1階 205セミナー室

添付ファイル： 第56回公開セミナー.pdf