2010.06.07

205, 1st floor, Eigineering 4th Bld, Hongo Campus

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


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

Abstract:
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.

Schedule: 10:30-11:30 Monday 7th June, 2010

Place: 205, 1st floor, Eigineering 4th Bld, Hongo Campus

Attached file: The 56th open seminar.pdf