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Sunday, May 29, 2016

#346 Semiconductor material engineering, part IV

Here is one more example of semiconductor material engineering. This time modifications of the chemical composition of some semiconductors are geared toward alteration of their magnetic properties.


Most of the mainstream semiconductors feature very low magnetic susceptibility, i.e. very small response to the magnetic field. Examples of non-magnetic semiconductors include silicon, germanium as well as gallium arsenide, indium arsenide and others. Some non-magnetic semiconductors when doped with transition metals (e.g. iron, manganese, chromium…) acquire well defined ferromagnetic properties, and hence, turn into magnetic semiconductors. For instance, originally diamagnetic gallium arsenide when doped with manganese (GaMnAs) features significantly increased magnetic susceptibility. Known as dilute magnetic semiconductors these materials will play key role in spintronics.

Posted by Jerzy Ruzyllo at 11:30 AM | Semiconductors | Link is the personal blog of Jerzy Ruzyllo. With over 35 years of experience in academic research and teaching in the area of semiconductor engineering (currently holding position of a Distinguished Professor of Electrical Engineering and Professor of Materials Science and Engineering at Penn State University), he has a unique perspective on the developments in this progress driving technical domain and enjoys blogging about it.

With over 2000 terms defined and explained, Semiconductor Glossary is the most complete reference in the field of semiconductors on the market today.

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