Wednesday, 26. April 2017

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KTH Research Project Database > Physics and Energy

Physics and Energy
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Advanced materials for future electronics - spintronics (»Add to Infobox)

Research Leader: Professor K Venkat Rao
Rajeev Ahuja, Lyuba Belova, Hong Tao Cao, Amita Gupta, Professor Börje Johansson, Mukes Kapilashrami, Amilcar Pinto Bedoya, Parmanand Sharma, Andrey Shkabko, Valter Ström, Chandran Sudhakar


Engineering Material Physics, Applied Material Physics

Electronics of the future is expected to incorporate in one entity the manifestations of charge and spin of electrons, thus enabling multifunctional devices which are magnetic, semiconductor as well optically active. One requirement for this is the development of transparent semiconductors with ferromagnetic ordering at far above room temperatures. With the discovery of a new approach to tailor Mn doped ZnO as a material appropriate for the emerging field of spintronics, reported in Nature Materials, Oct 2003 issue, we in Sweden have now the opportunity to actively promote the field. After a few manmade controversies, recent papers in high profile journals confirm beyond any doubt the findings we reported in NM and provide further evidence for the carrier-induced mechanism as the origin of ferromagnetism in this material (e.g: PRL 15 April, 2005, PRL May 13, 2005, JACS March 2005, APL April 2005 issues).

We have now expanded the above study to a whole new class of Cu doped oxides, phosphides and others. About 16 new systems have been already patented. Both theoretically, and from an application point of view a magnetic semiconductor based on ZnO is the most promising candidate for future spintronic and magnetooptic device applications.

While working intensely on new room temperature ferromagnetic semiconductors, we are now also focusing on the fundamental studies of patterned structures of these materials, exploiting ink-jet technology, which are suitable for potential applications: optical, or transport and magnetic. A comprehensive activity both from a theoretical and mostly from an experimental point of view are our intense activities in this field with many patents, and invited talks at international conferences.



Keywords:
Semiconductors, Magnetism, Magnetoresistivity, Optical properties, Spin dynamics, Oxides

SOURCE OF FUNDING (6/6) 

Carl Trygger Foundation

SIDA (Swedish International Development Cooperation Agency)

SSF (Swedish Foundation for Strategic Research)

STINT (The Swedish Foundation for International Cooperation in Research and Higher Education)

VINNOVA + industry

VR (The Swedish Research Council)


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