Academic Journal
Current-induced picosecond magnetization dynamics in a Ta/CoFeB/MgO hall bar
| العنوان: | Current-induced picosecond magnetization dynamics in a Ta/CoFeB/MgO hall bar |
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| المؤلفون: | Spicer, T M, Durrant, C J, Keatley, P S, Kruglyak, V V, Chen, W, Xiao, G, Hicken, R J |
| المساهمون: | National Science Foundation, Engineering and Physical Sciences Research Council |
| المصدر: | Journal of Physics D: Applied Physics ; volume 52, issue 35, page 355003 ; ISSN 0022-3727 1361-6463 |
| بيانات النشر: | IOP Publishing |
| سنة النشر: | 2019 |
| الوصف: | Time-resolved Kerr microscopy (TRSKM) has been used to explore the small amplitude picosecond magnetization dynamics induced by spin–orbit torques in a Ta(4 nm)/Co 40 Fe 40 B 20 (1 nm)/MgO(1.6 nm)/Ta(1 nm) Hall bar structure. The time dependent polar magneto optical Kerr effect was recorded following injection of a current pulse of 70 ps duration. Macrospin simulations provide a reasonable description of the precession and a transient background response as the field strength and current polarity are varied, while confirming that the in-plane spin–orbit torque is dominant within this system. Increasing the current density within the simulations leads to coherent magnetization reversal. Inclusion of a modest in-plane bias field is found to reduce both the switching current and the time required for switching. The orientation of the in-plane field relative to the direction of the current determines whether the magnetization can be switched backwards and forwards by current pulses of the same or opposite polarity. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| DOI: | 10.1088/1361-6463/ab2693 |
| DOI: | 10.1088/1361-6463/ab2693/pdf |
| الاتاحة: | http://dx.doi.org/10.1088/1361-6463/ab2693 http://iopscience.iop.org/article/10.1088/1361-6463/ab2693 http://iopscience.iop.org/article/10.1088/1361-6463/ab2693/pdf https://iopscience.iop.org/article/10.1088/1361-6463/ab2693/pdf https://iopscience.iop.org/article/10.1088/1361-6463/ab2693 |
| Rights: | http://creativecommons.org/licenses/by/3.0/ ; https://iopscience.iop.org/info/page/text-and-data-mining |
| رقم الانضمام: | edsbas.5C268E50 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/1361-6463/ab2693 |
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