On the Influence of a Non-Local Electrodynamics in the Irreversible Magnetization of Non-Magnetic Borocarbides

Silhanek, A. V.; Civale, L.; Thompson, J. R.; Canfield, P. C.; Bud'ko, S. L.; Paul, D. McK.; Tomy, C. V.

On the Influence of a Non-Local Electrodynamics in the Irreversible Magnetization of Non-Magnetic Borocarbides

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Description

We present an overview of the temperature, field and angular dependence of the irreversible magnetization of non-magnetic borocarbides (Y;Lu) Ni_2 B_2 C. We show that nonlocal electrodynamics influences pinning via the unusual behavior of the shear modulus in non-hexagonal lattices. On top of that, we observe that the pinning force density F_p exhibits a rich anisotropic behavior that sharply contrasts with its small mass anisotropy. When $H \bot c$, F_p is much larger and has a quite different H dependence, indicating that other pinning mechanisms are present.
proceedings of the NATO Advanced Research Workshop on "New trends in superconductivity", Yalta (Ukraine), September 2001