Time dependence of magnetization reversal when beginning with pre-existing nucleation sites
Time dependence of magnetization reversal when beginning with pre-existing nucleation sites
复制标题
从预先存在的成核位点开始时磁化反转的时间依赖性
DOI：
10.1063/1.4809762
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Karpovski
中科院分区：
文献类型：
--
作者：
Y. W. Windsor;A. Gerber;I. Korenblit;M. Karpovski
我们在具有垂直各向异性的Co/Pd多层中使用时间和场相关的磁化反转测量来检测磁化铁磁体中存在的相反磁化的稀释包体。由于周围物质产生的偶极场，这样的飞地是稳定的，并且它们在反转开始时的存在可以以数量级加速这一过程。抑制这些核并达到真正磁饱和所需的场比可观测到的宏观饱和场高一个数量级。扩展了Fatuzzo-Labrune模型，使其可以描述从准备成核域开始的磁化反转。
We use measurements of time and field dependent magnetization reversal in Co/Pd multilayers with perpendicular anisotropy to detect the presence of dilute enclaves of opposite magnetization within a magnetized ferromagnet. Such enclaves are stable due to dipolar fields generated by the surrounding material, and their presence at the onset of reversal can speed the process by orders of magnitude. The field required to suppress these nuclei and reach true magnetic saturation is found to be an order of magnitude higher than the observable macroscopic saturation field. Fatuzzo–Labrune model is extended to describe magnetization reversal starting with ready nucleation domains.