Noise imaging using magneto-optical sampling techniques (invited)
Noise imaging using magneto-optical sampling techniques (invited)
复制标题
使用磁光采样技术的噪声成像（特邀）
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Krichevsky
中科院分区：
文献类型：
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作者：
M. R. Freeman;G. Steeves;G. Ballentine;A. Krichevsky
大多数超快频闪时间分辨实验的假设是所研究的动力学完全是确定性的。复杂的磁系统提供了多种机制，使这种假设可能失败。实验者面临的挑战是检测是否发生了随机响应的混合，如果是，则尽可能多地提取有关它的信息。我们描述了一种在频闪平均时间分辨成像实验的背景下观察随机样本行为的方法，并讨论了该方法可以应用的条件范围。给出了在其他确定性时间分辨扫描克尔成像测量中发现随机磁切换的示例。提出了小血小板热辅助切换的微磁模型的结果，以帮助阐明该过程及其解释。
The presumption in most ultrafast stroboscopic time-resolved experiments is that the dynamics under investigation are entirely deterministic. Complex magnetic systems offer several mechanisms whereby this presumption could fail. The challenge for the experimentalist is to detect if an admixture of stochastic response is occurring, and if so, to extract as much information about it as possible. We describe a method for observing random sample behavior within the context of stroboscopically averaged time-resolved imaging experiments, and discuss the range of conditions over which it may be applied. Examples are presented in which random magnetic switching is found within otherwise deterministic time-resolved scanning Kerr imaging measurements. Results from micromagnetic modeling of thermally assisted switching in a small platelet are presented to help elucidate the procedure and its interpretation.