Spin injection properties in trilayer graphene lateral spin valves
We report on the electrical injection and detection of spin accumulation in trilayer-graphene/MgO/ Permalloy lateral spin-valve (LSV) structure. Non-local spin valve signal is clearly observed in the LSV, indicating that spin coherence extends underneath all ferromagnetic contacts.We also show tha...
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| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/96526 http://hdl.handle.net/10220/9938 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | We report on the electrical injection and detection of spin accumulation in trilayer-graphene/MgO/
Permalloy lateral spin-valve (LSV) structure. Non-local spin valve signal is clearly observed in the
LSV, indicating that spin coherence extends underneath all ferromagnetic contacts.We also show that
low-resistivity graphene/MgO/Py junctions enable efficient spin injection and detection in LSV with
high applied current density, which leads to large spin accumulation of 120 μV at room temperature.
A spin diffusion length of 1.5 μm was obtained for the injector-detector separation dependence of spin
valve signal measurements carried out at room temperature, while at T=10 K, the diffusion length
increases to 2.3 μm. |
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