A study of flux lines lattice order and critical current with time of flight small angle neutron scattering

TL;DR

This paper demonstrates that a time of flight small angle neutron scattering technique improves the resolution of flux line lattice order measurements in superconductors, providing better insights into vortex structures and pinning mechanisms.

Contribution

It introduces a time of flight SANS method that enhances spatial resolution for studying flux line lattices in superconductors, surpassing traditional techniques.

Findings

Time of flight SANS reveals Bragg peaks of FLL with improved resolution.

Enhanced measurement of translational order in flux line lattices.

Implications for understanding pinning mechanisms in Niobium.

Abstract

Small angle neutron scattering (SANS) is an historical technique to study the flux lines lattice (FLL) in a superconductor. Structural characteristics of the FLL can be revealed, providing fundamental information for the physics of vortex lattice. However, the spatial resolution is limited and all the correlation lengths of order are difficult to extract with precision. We show here that a time of flight technique reveals the Bragg peak of the FLL, and also its translational order with a better resolution. We discuss the implication of these results for pinning mechanisms in a Niobium sample.