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

TL;DR

This paper investigates how nonlocal electrodynamics affects the irreversible magnetization in non-magnetic borocarbides, revealing complex anisotropic pinning behaviors influenced by lattice structure and magnetic field orientation.

Contribution

It provides the first detailed analysis of the impact of nonlocal electrodynamics on pinning and magnetization anisotropy in non-magnetic borocarbides.

Findings

Nonlocal electrodynamics influences pinning via shear modulus behavior.

Pinning force density F_p shows strong anisotropy and field dependence.

Different pinning mechanisms are active when magnetic field is perpendicular to the c-axis.

Abstract

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.