Effect of Cr atoms in vortex dynamics of NbSe₂ superconductor and study of second magnetization peak effect

Influence of pressure on the transport, magnetic, and structural properties of superconducting Cr0.0009NbSe2 single crystal

“…The T c of Cr x NbSe 2 is found to be less than that of pure NbSe 2 (ref. 8 and 13) and the analogous tendency of superconducting properties under both ambient and high pressure have been found in various intercalated compounds such as M x NbSe 2 (M ¼ Fe, Cr, Sn, Cu, Al), 12,13,22,27,29 Sr 0.1 Bi 2 Se 2 , 6,51 and Fe-based superconductors. [52][53][54][55] Fig.…”

“…The magnetic, superconducting, and ux pinning properties of Cr x NbSe 2 single crystals at ambient conditions have been recently reported. 27 Structural measurements at ambient pressure were performed at X-ray diffraction (XRD) beamline BL-11, INDUS-II synchrotron radiation source (Raja Ramanna Centre for Advanced Technology, Indore, India) with Angle Dispersive X-ray Diffraction (ADXRD) beamline (BL-11). The samples were powdered, drop cast on copper-coated carbon grids aer sonication in iso-propyl alcohol for 1 h, and air-dried for 5 h. Microstructural analyses of the sample were performed using a Tecnai G2 30ST (FEI) transmission electron microscope.…”

“…At ambient pressure, there are no additional peaks in the isothermal magnetization curves for Cr 0.0009 NbSe 2 . 27 The application of pressure isothermal magnetization exhibits a small magnetization peak close to 0.1 T below the superconducting transitions and it is known as the second magnetization peak (SMP). The isothermal magnetization curves (Fig.…”

“…18,19 The crystal structure of TMDC materials is made up of hexagonal Se-Nb-Se sandwiches, which are united through weak forces, prominent hexagonal layers, and strong anisotropic properties. The changes in the electronic properties 20,21 are produced by altering the lattice parameters, 22 compositional tunings such as doping, 23,24 irradiation 25,26 and intercalation between the layers, 13,[27][28][29][30] and applying external hydrostatic pressures. 3,8,31,32 The superconducting nature of TMDC has been studied intensively due to scarce magnetic and electronic properties and potential in technological applications.…”

“…The superconducting properties can be modied by the intercalation of magnetic and non-magnetic impurities in NbSe 2 , such as M x -NbSe 2 (M ¼ Cu, Fe, Co, Mn, Sn, Cr). 12,13,[27][28][29][30] The application of external pressure has been the most advantageous compared to other perturbations such as chemical doping, lattice disorder, impurity phases, and phase separation. The application of pressure uctuates the interstitial distance and changes the electronic band structure of the material without providing any chemical stability.…”