| Presentation | 2013-02-28 Correlation between polarity of magnetoresistance ratio and tunnel resistance in ferromagnetic SET with superconductive island Masashi TAKIGUCHI, Masataka MORIYA, Hiroshi SHIMADA, Yoshinao MIZUGAKI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Negative magnetoresistance ratio is shown in ferromagnet-superconductor-ferromagnet double tunnel junctions. An excessive spin accumulation in a superconductor produces the suppression of the superconductivity. Since the spin will be relaxed by time in a superconductor, more injection of spin-polarized quasiparticles from the ferromagnetic leads to the super-conductor are required to obtain the negative magnetoresistance ratio. The spin injection rate is driven by the tunnel resistance. It is predicted that the polarity of tunnel resistance and a magnetic resistance ratio has as negative correlation. We fabricated several ferromagnetic SET with superconductive island, and measured the correlation between the polarity of a magnetore-sistance ratio and the tunnel resistance. The samples which have the lower tunnel resistance showed the negative magnetore-sistance ratio, and other samples which have the higher tunnel resistance showed the positive magnetoresistance ratio. Our experimental results have an agreement with the prediction. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Tunnel magnetoresiatance effect / spin relaxation time / coulomb blockade |
| Paper # | ED2012-140,SDM2012-169 |
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| Conference Information | |
| Committee | ED |
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| Conference Date | 2013/2/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electron Devices (ED) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Correlation between polarity of magnetoresistance ratio and tunnel resistance in ferromagnetic SET with superconductive island |
| Sub Title (in English) | |
| Keyword(1) | Tunnel magnetoresiatance effect |
| Keyword(2) | spin relaxation time |
| Keyword(3) | coulomb blockade |
| 1st Author's Name | Masashi TAKIGUCHI |
| 1st Author's Affiliation | Department of Engineering Science, The University of Electro-Communications() |
| 2nd Author's Name | Masataka MORIYA |
| 2nd Author's Affiliation | Department of Engineering Science, The University of Electro-Communications |
| 3rd Author's Name | Hiroshi SHIMADA |
| 3rd Author's Affiliation | Department of Engineering Science, The University of Electro-Communications |
| 4th Author's Name | Yoshinao MIZUGAKI |
| 4th Author's Affiliation | Department of Engineering Science, The University of Electro-Communications |
| Date | 2013-02-28 |
| Paper # | ED2012-140,SDM2012-169 |
| Volume (vol) | vol.112 |
| Number (no) | 445 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |