Influence of pressure on the transport, magnetic, and structural properties of superconducting CrNbSe single crystal.

We investigate the superconducting critical current density ( ), transition temperature ( ), and flux pinning properties under hydrostatic pressure () for CrNbSe single crystal. The application of enhances in both electrical resistivity (∼0.38 K GPa: 0 ≤ ≤ 2.5 GPa) and magnetization (∼0.98 K GPa: 0 ≤ ≤ 1 GPa) measurements, which leads to a monotonic increase in and flux pinning properties. The field-dependent at various temperatures under is analyzed within the collecting pinning theory and it shows that pinning is the crossover to pinning above the critical pressure ( ∼0.3 GPa). Our systematic analysis of the flux pinning mechanism indicates that both the density of pinning centers and pinning forces greatly increase with the application of , which leads to an enhancement in the vortex state. Structural studies using synchrotron X-ray diffraction under pressure illustrate a stable hexagonal phase without any significant impurity phase and lattice parameter reduction with shows highly anisotropic nature.