Guiding of vortices under competing isotropic and anisotropic pinning conditions: Theory and experiment
Guiding of vortices under competing isotropic and anisotropic pinning conditions: Theory and experiment
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DOI：
10.1103/physrevb.76.014504
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发表时间：
2007-07-01
影响因子：
3.7
通讯作者：
Huth, Michael
中科院分区：
文献类型：
--
作者：
Soroka, Oleksiy K.;Shklovskij, Valerij A.;Huth, Michael
通过电子输运测量和相应的理论模拟研究了铌外延薄膜混合态中定制各向异性钉扎位点对非线性电阻率张量的影响。该薄膜是通过物理气相沉积铌到多面α-氧化铝基板上制备的。在接近临界温度的不同温度和不同磁场下，在小电流密度的极限下测定了薄膜的电阻率张量。在这些实验中，电流与衬底的刻面脊之间的角度被设置为0度和90度之间的五个固定角度。在很宽的参数范围内观察到沿小平面脊沿着的涡流的完美引导。所测得的折射率与所采用的随机建模方法的预测在很好的定量协议。
The influence of tailored anisotropic pinning sites on the nonlinear resistivity tensor in the mixed state of epitaxial thin films of niobium was studied by electronic transport measurements and accompanying theoretical modeling. The thin films were prepared by physical vapor deposition of niobium onto faceted alpha-alumina substrates. The resistivity tensor of the films was determined in the limit of small current densities at various temperatures close to the critical temperature and in different magnetic fields. In these experiments, the angle between the current and the facet ridges of the substrates was set at five fixed angles between 0 degrees and 90 degrees. Perfect guiding of the vortices along the facet ridges was observed over a wide parameter range. The measured resistivities were in good quantitative agreement with the predictions of the employed stochastic modeling approach.