|Title:||Angular effects of the critical current in Nb/Pd multilayers|
|Authors:||Prischepa, S. L.|
Gavrilkin, S. Yu.
Lykov, A. N.
Tsvetkov, A. Yu.
Vishniakov, Yu. V.
|Publisher:||PHYSICAL REVIEW B|
|Citation:||Angular effects of the critical current in Nb/Pd multilayers / S. Yu. Gavrilkin [and other] // PHYSICAL REVIEW B. – V. 74. – 2006. – P. 064509-1-064509-6.|
|Abstract:||The angular dependencies of the critical current density, Jc, for superconducting Nb/Pd multilayers which show, in parallel magnetic ﬁeld, a pronounced peak effect, were investigated here is deﬁned as the angle from the plane parallel to the sample surface. We have demonstrated that the procedure of measurements is an important factor for the Jc shape. When rotating the sample in a ﬁxed magnetic ﬁeld H, it was found that the external ﬁeld direction at which the maximum of Jc was obtained form an angle different from zero with respect to the planar direction. The angular position of the maximum depends on the external magnetic ﬁeld, as well as on the initial conditions under which the samples were kept. It is found that the more intense the peak effect is on the JcH curves, the larger the angular shift is of Jc in these structures. The results are explained in terms of the magnetic ﬁeld suppression of the percolation currents in a weak-link network. Flux trapped within grains by the ﬂux pinning processes is relatively stable at low ﬁelds and its contributions to the transport current suppression add vectorially to the applied ﬁeld.|
|Appears in Collections:||Публикации в зарубежных изданиях|
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