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Current induced magnetization switching in spin valves
We have studied the current induced magnetization switching (CIMS) in cobalt-based spin valve structures. Two exchange bias spin valves with extended fixed ferromagnets adopted as a current lead have been chosen for the study. The difference between them is that in the first structure, labeled EBSV (Exchange-Biased Spin Valve), no nano-oxide layer (NOL) was applied, while in the second structure, named NOL-EBSV, a NOL is inserted into the exchange biased pinned ferromagnet lead. The CIMSs in these two structures and in a non-exchange biased one, called SSV serving as the reference sample, have been studied. The temperature and field dependence of switching current in EBSV and SSV are also investigated for a better understanding the effect of exchange pinning field on the CIMS. The experiment result of CIMS in the EBSV shows a significant reduction in switching current density by a factor of 4.8, compared with a non-exchange biased spin valve with similar layer thicknesses. A double large reduction of switching current density is observed in the NOL-EBSV. We qualitatively analyze the effect of the exchange bias pinning field as well as of the nano-oxide layer on the reduction of switching current. A quantitative interpretation of the enhancement of CIMS by nano- oxide layer has been done by a three dimensional calculation of spin transport in EBSV and NOL-EBSV.
Current induced magnetization switching in spin valves
We have studied the current induced magnetization switching (CIMS) in cobalt-based spin valve structures. Two exchange bias spin valves with extended fixed ferromagnets adopted as a current lead have been chosen for the study. The difference between them is that in the first structure, labeled EBSV (Exchange-Biased Spin Valve), no nano-oxide layer (NOL) was applied, while in the second structure, named NOL-EBSV, a NOL is inserted into the exchange biased pinned ferromagnet lead. The CIMSs in these two structures and in a non-exchange biased one, called SSV serving as the reference sample, have been studied. The temperature and field dependence of switching current in EBSV and SSV are also investigated for a better understanding the effect of exchange pinning field on the CIMS. The experiment result of CIMS in the EBSV shows a significant reduction in switching current density by a factor of 4.8, compared with a non-exchange biased spin valve with similar layer thicknesses. A double large reduction of switching current density is observed in the NOL-EBSV. We qualitatively analyze the effect of the exchange bias pinning field as well as of the nano-oxide layer on the reduction of switching current. A quantitative interpretation of the enhancement of CIMS by nano- oxide layer has been done by a three dimensional calculation of spin transport in EBSV and NOL-EBSV.
Current induced magnetization switching in spin valves
Nguyen, H.Y.T. (author) / H.Yi, (author) / S.J.Joo, (author) / K.J.Lee, (author) / K-H Shin, (author)
2006-10-01
755241 byte
Conference paper
Electronic Resource
English
Influence of the magnetostatic coupling in magnetization switching driven by spin-polarized current
| British Library Online Contents | 2006