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首页> 外文期刊>Philosophical magazine, B. Physics of condensed matter, electronic, optical, and magnetic properties >Field and frequency dependences of ac magnetic measurements as a probe of nonlinear flux diffusion in high-temperature superconductors
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Field and frequency dependences of ac magnetic measurements as a probe of nonlinear flux diffusion in high-temperature superconductors

机译：交流磁测量的场和频率依赖性，作为高温超导体中非线性磁通扩散的探针

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We studied the frequency and field dependences of harmonic magnetic susceptibilities by numerically solving the diffusion equation for the magnetic flux, incorporating both creep and flow processes in a collective pinning approach. In particular the irreversibility (H, T) line is analysed and discussed in terms of the de magnetic field dependence of the onset temperatures of the first and the third harmonics respectively. It is shown that, in our conditions, the Taff resistivity is the dominant process for the flux diffusion at the onset temperature of the imaginary part of the first harmonic. On the contrary, the onset of the third harmonic is determined by the cross-over between processes dominated by the Taff and the creep resistivities. [References: 9]
机译：我们通过数值求解磁通量的扩散方程，并在共同钉扎方法中同时考虑了蠕变和流动过程，研究了谐波磁化率的频率和磁场依赖性。特别地，分别根据一次谐波和三次谐波的起始温度的去磁场依赖性来分析和讨论不可逆性（H，T）线。结果表明，在我们的条件下，在一次谐波的虚部开始温度下，Taff电阻率是磁通扩散的主要过程。相反，三次谐波的发生是由塔夫（Taff）主导的过程和蠕变电阻率之间的交叉决定的。 [参考：9]

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