Influence of nonlocal electrodynamics on the anisotropic vortex pinning in $YNi_2B_2C$

A. V. Silhanek; J. R. Thompson; L. Civale; D. McK. Paul; C. V. Tomy

doi:10.1103/physrevb.64.012512

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Influence of nonlocal electrodynamics on the anisotropic vortex pinning in $YNi_2B_2C$

A. V. Silhanek·J. R. Thompson·L. Civale·D. McK. Paul·C. V. Tomy

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Abstract

We have studied the pinning force density Fp of YNi_2B_2C superconductors for various field orientations. We observe anisotropies both between the c-axis and the basal plane and within the plane, that cannot be explained by usual mass anisotropy. For magnetic field $H \parallel c$, the reorientation structural transition in the vortex lattice due to nonlocality, which occurs at a field $H_1 \sim 1kOe$, manifests itself as a kink in Fp(H). When $H \bot c$, Fp is much larger and has a quite different H dependence, indicating that other pinning mechanisms are present. In this case the signature of nonlocal effects is the presence of a fourfold periodicity of Fp within the basal plane.

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A. V. Silhanek, J. R. Thompson, L. Civale, D. McK. Paul, C. V. Tomy. 2001-06-25. Influence of nonlocal electrodynamics on the anisotropic vortex pinning in $YNi_2B_2C$. https://doi.org/10.1103/physrevb.64.012512

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