Paper Abstract and Keywords |
Presentation |
2010-02-22 16:30
Observation of enhanced MR effects in a single electron transistor with ferromagnetic lead electrodes Nobuyuki Tamura, Kento Kikuchi, Masataka Moriya, Tadayuki Kobayashi, Hiroshi Shimada, Yoshinao Mizugaki (Univ. of Electro-Comm.) ED2009-204 SDM2009-201 Link to ES Tech. Rep. Archives: ED2009-204 SDM2009-201 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
We report our experimental results on the magneto-resistance ratio ($MRR$) of single-electron
transistors (SETs)
with ferromagnetic (FM) lead electrodes. We fabricated two types of SETs: one
has a nomal metal (NM) island, and the other has a superconductor (SC)
island. We measured their $MRR$. The $MRR$ of the FM/NM/FM-SET was in range
of a theoretical prediction. On the other hand, the $MRR$ of the
FM/SC/FM-SET was beyond the theoritcal value. Besides, the enhanced $MRR$
effects were observed in these SETs. The enhanced $MRR$ is a phenomenon
that the $MRR$ in the SET-OFF state is enhanced more than that in the
SET-ON state. We calculated a theoretical model including cotunneling
processes and suceeded to reproduce the experimental $MRR$ values. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
ferromagnet / superconductor / Coulomb blockade / single-electron transistor / magneto-resistance ratio / / / |
Reference Info. |
IEICE Tech. Rep., vol. 109, no. 422, ED2009-204, pp. 47-52, Feb. 2010. |
Paper # |
ED2009-204 |
Date of Issue |
2010-02-15 (ED, SDM) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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ED2009-204 SDM2009-201 Link to ES Tech. Rep. Archives: ED2009-204 SDM2009-201 |
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