Dependence of vortex phase transitions in mesoscopic BSCCO superconductor at tilted magnetic fields

TL;DR

This study investigates how vortex phase transitions in a mesoscopic BSCCO superconductor depend on magnetic field orientation, revealing a transition from 2D liquid to 3D vortex lattice influenced by field components.

Contribution

It provides experimental evidence on the dependence of vortex phase transitions on magnetic field tilt angles in mesoscopic BSCCO superconductors.

Findings

Transition from 2D liquid to 3D vortex lattice at high temperatures.

Transition depends on the perpendicular magnetic field component.

Dissipation is influenced by the parallel magnetic field component.

Abstract

A micron sized single crystal of the superconductor BSCCO was studied using silicon mechanical micro-oscillators at various tilt angles of the dc magnetic field with respect to the c axis of the sample. Different phases of the vortex matter were detected by measuring changes in the value and sign of the oscillator resonant frequency variation with temperature. We could explain the change in the sign of this variation at high temperatures as the transition from the 2D liquid of decoupled pancakes to a reversible 3D vortex lattice. The data indicates that this transition only depends on the magnetic field perpendicular to the superconducting layers while the dissipation involved in this process depends on the component parallel to them.