Bias dependence of the tunneling magnetoresistance in double spin-filter junctions
| Autor: | Bo-Zang Li, Zheng-Wei Xie |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 93:9111-9115 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.1570504 |
| Popis: | With the intention of providing reference materials for research, manufacture and application of magnetoresistance devices, we calculate the dependences of tunneling magnetoresistance (TMR) in a NM/FI/FI/NM double spin-filter junction (DSFJ) on the bias (voltage) and, secondarily, on the thickness, barrier height and molecular field of FIs [here the NM and FI represent the nonmagnetic electrode and the ferromagnetic insulator (semiconductor) spacer, respectively]. Our results show that for the TMR of the DSFJ besides its very high value it does not decrease monotonously and rapidly with a rise of bias, but increases slowly at first and then decreases after a maximum value is reached. This feature is in distinct contrast to the ordinary magnetic tunnel junction FM/NI/FM and thus facilitates the application of the DSFJ as a magnetoresistance device [here FM and NI denote the ferromagnetic electrode and the nonmagnetic insulator (semiconductor) spacer, respectively]. The influence of the thickness, barrier h... |
| Databáze: | OpenAIRE |
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