Temperature dependence of shot noise in double barrier magnetic tunnel junctions
| Autor: | Jiafeng Feng, J. M. D. Coey, Jiasen Niu, Xiaoguang Zhang, Jian Wei, Liang Liu, Xing-Jie Han |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fano factor
Materials science Condensed matter physics Shot noise 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Double barrier 01 natural sciences Condensed Matter::Materials Science Tunnel magnetoresistance Condensed Matter::Superconductivity 0103 physical sciences 010306 general physics 0210 nano-technology Spin relaxation Quantum tunnelling Spin-½ |
| Zdroj: | Physical Review B. 97 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.97.104412 |
| Popis: | Shot noise reveals spin dependent transport properties in a magnetic tunnel junction. We report measurement of shot noise in CoFeB/MgO/CoFeB/MgO/CoFeB double barrier magnetic tunnel junctions, which shows a strong temperature dependence. The Fano factor used to characterize shot noise increases with decreasing temperature. A sequential tunneling model can be used to account for these results, in which a larger Fano factor results from larger spin relaxation length at lower temperatures. |
| Databáze: | OpenAIRE |
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