Creep and flow regimes of magnetic domain-wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
Creep and flow regimes of magnetic domain-wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
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DOI：
10.1103/physrevlett.99.217208
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发表时间：
2007-11-23
影响因子：
8.6
通讯作者：
Stamps, R. L.
中科院分区：
文献类型：
--
作者：
Metaxas, P. J.;Jamet, J. P.;Stamps, R. L.
我们报告的磁畴壁的速度测量在大范围内施加的磁场在Pt/Co（0.5-0.8 nm）/Pt薄膜的垂直各向异性。获得完整的速度场特性，使检查热激活蠕变和粘性流动之间的过渡：运动制度预测驱动的弹性界面在弱无序介质中的一般理论。耗散有限的流态被发现是一致的进动域壁运动，分析产生的阻尼参数，α值。
We report on magnetic domain-wall velocity measurements in ultrathin Pt/Co(0.5-0.8 nm)/Pt films with perpendicular anisotropy over a large range of applied magnetic fields. The complete velocity-field characteristics are obtained, enabling an examination of the transition between thermally activated creep and viscous flow: motion regimes predicted from general theories for driven elastic interfaces in weakly disordered media. The dissipation limited flow regime is found to be consistent with precessional domain-wall motion, analysis of which yields values for the damping parameter, alpha.