Spin Electronics: How future computer works?

Mr Atsufumi Hirohata (PhD student, Department of Physics, Selwyn College)

Saturday, 9 June, 2001; 7:30-9:30pm

Old Kitchens, Queens' College

Recent dramatic developments of information technology (IT) require three following points:
(i) large capacity data storage,
(ii) fast data processing and
(iii) high-speed data transfer.
Surprisingly, the performance of both magnetic memories (i) and semiconductor processors (ii), for instance, has been increasing approximately 60% per year. These conventional devices, however, are known to hit physical limits in about 10 years time. In order to circumvent the limits, a combination of spins (for storage), electrons (for processing) and photons (for transfer) has been introduced, so-called spin electronics. Spin electronics provide not only various application opportunities but also interesting physics inside. The progress of spin electronics will be summarised in this talk, and spin transport phenomena will be discussed from the magnetic point of view.