Pt/Co/Pt薄膜脱钉转变的热圆化
Thermal rounding of the depinning transition in ultrathin Pt/Co/Pt films
摘要：
我们进行扩展磁畴壁驱动的垂直各向异性的Pt/Co/Pt铁磁薄膜的平均速度的标度分析，作为一个功能的外磁场为不同的膜厚度。我们发现，缩放周围的热圆脱钉过渡的实验数据是一致的普遍脱钉指数理论预期的弹性界面所描述的一维淬火爱德华-威尔金森方程。特别是，脱钉指数$β$和热舍入指数$ψ$的值进行了测试和本实验数据的分析是兼容的$β=0.33$和$ψ=0.2$，在协议与数值模拟。
英文摘要：
We perform a scaling analysis of the mean velocity of extended magnetic domain walls driven in ultrathin Pt/Co/Pt ferromagnetic films with perpendicular anisotropy, as a function of the applied external field for different film-thicknesses. We find that the scaling of the experimental data around the thermally rounded depinning transition is consistent with the universal depinning exponents theoretically expected for elastic interfaces described by the one-dimensional quenched Edwards-Wilkinson equation. In particular, values for the depinning exponent $β$ and thermal rounding exponent $ψ$ are tested and the present analysis of the experimental data is compatible with $β=0.33$ and $ψ=0.2$, in agreement with numerical simulations.
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