Characterization of the magnetization reversal of perpendicular Nanomagnetic Logic clocked in the ns-range
Characterization of the magnetization reversal of perpendicular Nanomagnetic Logic clocked in the ns-range
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DOI：
10.1063/1.4944336
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发表时间：
2016-03
期刊：
影响因子：
1.6
通讯作者：
G. Ziemys;C. Trummer;S. B. Gamm;I. Eichwald;D. Schmitt-Landsiedel;M. Becherer
中科院分区：
文献类型：
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作者：
G. Ziemys;C. Trummer;S. B. Gamm;I. Eichwald;D. Schmitt-Landsiedel;M. Becherer
我们研究了垂直各向异性Co/Pt纳米磁体在宽磁场脉冲宽度范围内的磁化反转。本实验的脉冲长度从700毫秒到20纳秒。我们发现，在脉冲时间大于100 ns （tp - bb0 - 100 ns）时，常用的Arrhenius模型能很好地拟合单参数的实验数据。然而，在100 ns （tp < 100 ns）以下，观察到开关场振幅急剧增加，与Arrhenius模型的偏差变得不可接受。当脉冲时间较短时，该模型可以通过动态开关场的反转时间项进行调整，该时间项仅依赖于脉冲幅度而不再依赖于温度。在sub-100 ns范围内对磁化反转进行精确建模对于确保在有利的ghz范围内可靠运行以及探索和设计新型纳米磁逻辑电路和架构至关重要。
We have investigated the magnetization reversal of fabricated Co/Pt nanomagnets with perpendicular anisotropy within a wide range of magnetic field pulse widths. This experiment covers the pulse lengths from 700 ms to 20 ns. We observed that the commonly used Arrhenius model fits very well the experimental data with a single parameter set for pulse times above 100 ns (tp > 100 ns). However, below 100 ns (tp < 100 ns), a steep increase of the switching field amplitude is observed and the deviation from the Arrhenius model becomes unacceptable. For short pulse times the model can be adjusted by the reversal time term for the dynamic switching field which is only dependent on the pulse amplitude and not on temperature anymore. Precise modeling of the magnetization reversal in the sub-100 ns-range is crucially important to ensure reliable operation in the favored GHz-range as well as to explore and design new kinds of Nanomagnetic Logic circuits and architectures.