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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1106.3976cond-mat.mtrl-sci
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弹道(进动)对常规磁开关的贡献

Ballistic (precessional) contribution to the conventional magnetic switching

Ya. B. Bazaliy, Andrzej Stankiewicz

摘要:

我们考虑一个具有易磁化轴各向异性能量的磁矩,通过沿该轴施加的外场来切换。垂直于轴施加额外的小的、与时间无关的偏置场。研究发现,磁体的开关时间是磁场从“上”扫到“下”的速率的非单调函数。开关时间在特定的最佳扫描时间处呈现最小值。这种不寻常的行为是由混合物的弹道(旋进)旋转的时刻所造成的垂直偏置场在一个可变的开关场的存在下。我们推导出的最佳开关时间的解析表达式,并为整个依赖的开关时间上的字段扫描时间。最佳场扫描时间的存在对磁存储器件的优化具有重要意义。

英文摘要:

We consider a magnetic moment with an easy axis anisotropy energy, switched by an external field applied along this axis. Additional small, time-independent bias field is applied perpendicular to the axis. It is found that the magnet's switching time is a non-monotonic function of the rate at which the field is swept from "up" to "down". Switching time exhibits a minimum at a particular optimal sweep time. This unusual behavior is explained by the admixture of a ballistic (precessional) rotation of the moment caused by the perpendicular bias field in the presence of a variable switching field. We derive analytic expressions for the optimal switching time, and for the entire dependence of the switching time on the field sweep time. The existence of the optimal field sweep time has important implications for the optimization of magnetic memory devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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