Title |
Magnetic Mn5Ge3 nanocrystals embedded in crystalline Ge: a magnet/semiconductor hybrid synthesized by ion implantation
|
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Published in |
Discover Nano, September 2012
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DOI | 10.1186/1556-276x-7-528 |
Pubmed ID | |
Authors |
Shengqiang Zhou, Wenxu Zhang, Artem Shalimov, Yutian Wang, Zhisuo Huang, Danilo Buerger, Arndt Mücklich, Wanli Zhang, Heidemarie Schmidt, Manfred Helm |
Abstract |
The integration of ferromagnetic Mn5Ge3 with the Ge matrix is promising for spin injection in a silicon-compatible geometry. In this paper, we report the preparation of magnetic Mn5Ge3 nanocrystals embedded inside the Ge matrix by Mn ion implantation at elevated temperature. By X-ray diffraction and transmission electron microscopy, we observe crystalline Mn5Ge3 with variable size depending on the Mn ion fluence. The electronic structure of Mn in Mn5Ge3 nanocrystals is a 3d6 configuration, which is the same as that in bulk Mn5Ge3. A large positive magnetoresistance has been observed at low temperatures. It can be explained by the conductivity inhomogeneity in the magnetic/semiconductor hybrid system. |
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