Temperature dependence of intrinsic critical current in perpendicular easy axis CoFeB/MgO magnetic tunnel junctions
Current induced magnetization switching in CoFeB/MgO-based magnetic tunnel junctions (MTJs) with a perpendicular easy axis is studied above room temperature. The intrinsic critical current IC0 of the MTJs decreases with increasing temperature. From a vector-network-analyzer ferromagnetic resonance m...
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| Veröffentlicht in: | Applied physics letters 2021-12, Vol.119 (24) |
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| container_issue | 24 |
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| container_title | Applied physics letters |
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| creator | Takeuchi, Yutaro Enobio, Eli Christopher I. Jinnai, Butsurin Sato, Hideo Fukami, Shunsuke Ohno, Hideo |
| description | Current induced magnetization switching in CoFeB/MgO-based magnetic tunnel junctions (MTJs) with a perpendicular easy axis is studied above room temperature. The intrinsic critical current IC0 of the MTJs decreases with increasing temperature. From a vector-network-analyzer ferromagnetic resonance measurement with a heating system, temperature dependence of magnetic anisotropy and damping constant is evaluated. We find that the reduction of IC0 at elevated temperature is mainly due to a decrease in magnetic anisotropy. A slight increase in the damping constant with temperature rise is also observed, consistent with the mechanism considering electron scattering through the inter-band transition. |
| doi_str_mv | 10.1063/5.0072957 |
| format | Article |
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| source | American Institute of Physics (AIP) Journals; Alma/SFX Local Collection |
| subjects | Applied physics Critical current (superconductivity) Damping Ferromagnetic resonance Ferromagnetism High temperature Magnesium oxide Magnetic anisotropy Room temperature Temperature Temperature dependence Tunnel junctions |
| title | Temperature dependence of intrinsic critical current in perpendicular easy axis CoFeB/MgO magnetic tunnel junctions |
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