Stochastic resonance of a domain wall in a stripe with two pinning sites
Stochastic resonance of a domain wall in a stripe with two pinning sites
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DOI：
10.1063/1.3556314
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发表时间：
2011-02-14
影响因子：
4
通讯作者：
Carpentieri, Mario
中科院分区：
文献类型：
--
作者：
Martinez, Eduardo;Finocchio, Giovanni;Carpentieri, Mario
我们报告了对具有两个钉扎位点的铁磁条中单个畴壁的随机共振现象的观察。在弱振荡场下，在存在热波动的情况下，壁在两个收缩之间执行不规则的过渡。我们的结果表明，可以在最佳噪声水平下实现与驱动场同步的墙壁过渡。通过计算作为温度函数的输出信号功率来量化随机谐振。分析指出，该系统可用于设计控制良好的放大装置，并可作为纳米探测器应用。 (C) 2011 年美国物理研究所。 [doi:10.1063/1.3556314]
We report on the observation of stochastic resonance phenomenon of a single domain wall in a ferromagnetic stripe with two pinning sites. Under a weak oscillating field, the wall performs irregular transitions between both constrictions in the presence of thermal fluctuations. Ours results indicate that synchronized wall transitions with the driving field can be achieved at the optimal level of noise. The stochastic resonance is quantified by computing the output signal power as a function of temperature. The analysis points out that this system could be used to design well-controlled amplification devices, which could find application as nanodetectors. (C) 2011 American Institute of Physics. [doi:10.1063/1.3556314]