Carbon substitution in MgB2 single crystals: structural and superconducting properties

Abstract

Growth of carbon substituted magnesium diboride Mg(B1-xCx)2 single crystals with 0<x<0.15 is reported and the structural, transport, and magnetization data are presented. The superconducting transition temperature decreases monotonically with increasing carbon content in the full investigated range of substitution. By adjusting the nominal composition, Tc of substituted crystals can be tuned in a wide temperature range between 10 and 39 K. Simultaneous introduction of disorder by carbon substitution and significant increase of the upper critical field Hc2 is observed. Comparing with the non-substituted compound, Hc2 at 15K for x=0.05 is enhanced by more then a factor of 2 for H oriented both perpendicular and parallel to the ab-plane. This enhancement is accompanied by a reduction of the Hc2-anisotropy coefficient gamma from 4.5 (for non-substituted compound) to 3.4 and 2.8 for the crystals with x = 0.05 and 0.095, respectively. At temperatures below 10 K, the single crystal with larger carbon content shows Hc2 (defined at zero resistance) higher than 7 and 24 T for H oriented perpendicular and parallel to the ab-plane, respectively. Observed increase of Hc2 cannot be explained by the change in the coherence length due to disorder-induced decrease of the mean free path only.

22 pages, 9 figures, 4 tables

References in corpus (25)

• Enhancement of the critical current density and flux pinning of MgB2 superconductor by nanoparticle SiC doping
• Systematic effects of carbon doping on the superconducting properties of Mg(B${}_{1-x}$C${}_x$)${}_2$
• Temperature and field dependence of the anisotropy of MgB2
• High-field superconductivity in alloyed MgB2 thin films
• Carbon-substituted MgB2 single crystals
• Crystal Chemistry of Carbon-Substituted MgB2
• Intralayer Carbon Substitution in the MgB2 Superconductor
• Carbon-substitution effect on the electronic properties of MgB${}_2$ single crystals
• Carbon doping of superconducting magnesium diboride
• Mixed state properties of superconducting MgB2 single crystals
• Substitution induced pinning in MgB_2 superconductor doped with SiC nano-particles
• Effect of nano-carbon particle doping on the flux pinning properties of MgB2 superconductor
• Carbon solubility and superconductivity in MgB2
• Temperature dependence and anisotropy of the bulk upper critical field H_c2 of MgB_2
• Superconductivity, critical current density, and flux pinning in MgB_{2-x}(SiC)_{x/2} superconductor after SiC nanoparticle doping
• Effect of Carbon-Doping in Bulk Superconducting MgB2 Samples
• Superconducting Transition and Phase Diagram of Single Crystal MgB2
• Doping Effect of Nano-Diamond on Superconductivity and Flux Pinning in MgB2
• Enhancement of the irreversibility field by carbon substitution in single crystal MgB${}_2$
• Improved Irreversibility Behaviour and Critical Current Density in MgB2-Diamond Nanocomposites
• Single crystal growth of MgB2 and thermodynamics of Mg-B-N system at high pressure
• Disorder-induced Phase Transition of Vortex Matter in MgB2
• Surface Contribution to the Superconducting Properties of MgB2 Single Crystals
• Anisotropy of the superconducting state properties and phase diagram of MgB2 by torque magnetometry on single crystals
• Single crystal growth and properties of MgB2 and Mg(B1-xCx)2

Cited by in corpus (48)

• Probing multiband superconductivity by point-contact spectroscopy
• Improved Hc2 in Bulk-Form Magnesium Diboride by Mechanical Alloying With Carbon
• Superfluid density and specific heat within self-consistent scheme for two-band superconductor
• Al substitution in MgB2 crystals: influence on superconducting and structural properties
• The different development of the anisotropic upper critical field in MgB2 by aluminum and carbon doping
• Nanoscale grains, high irreversibility field, and large critical current density as a function of high energy ball milling time in C-doped magnesium diboride
• Correlated enhancement of Hc2 and Jc in carbon nanotube-doped MgB2
• Evidence for Single-gap Superconductivity in Mg(B_{1-x}C_x)_2 Single Crystals with x=0.132 from Point-Contact Spectroscopy
• Strong magnetic pair breaking in Mn substituted MgB_2 single crystals
• Graphene doping to enhance flux pinning and supercurrent carrying ability in magnesium diboride superconductor
• Correlation between doping induced disorder and superconducting properties in carbohydrate doped MgB2
• Influence of the upper critical field anisotropy on the transport properties of polycrystalline MgB${}_2$
• Enhancement of the in-field Jc of MgB2 via SiCl4 doping
• A Study of Carbon Substitutions in MgB_2 within the two-band Eliashberg theory
• Superconducting Properties of adipic acid doped Bulk MgB2 Superconductor
• MgB2 single crystals substituted with Li and with Li-C: Structural and superconducting properties
• Inversion of two-band superconductivity at the critical electron doping of (Mg,Al)B${}_2$
• Atmospheric conditions and their effect on ball-milled magnesium diboride
• Role of charge doping and lattice distortions in codoped Mg_{1-x}(AlLi)_{x}B_2 compounds
• Enhancement of flux pinning and high critical current density in graphite doped MgB2 superconductor
• First-principles prediction of phonon-mediated superconductivity in XBC (X= Mg, Ca, Sr, Ba)
• Clean and Dirty Superconductivity in Pure, Al doped, and Neutron Irradiated MgB2: a Far-Infrared Study
• Hydrostatic pressure induced transition from δTc to δl pinning mechanism in MgB2
• $Abinitio$ study of Li-Mg-B superconductors
• de Haas-van Alphen effect investigation of the electronic structure of Al substituted MgB_2
• Infrared properties of Mg${}_{1-x}$Al${}_x($B${}_{1-y}$C${}_y$)${}_2$ single crystals in the normal and superconducting state
• Synthesis of Mg(B${}_{1-x}$C${}_x$)${}_2$ Powders
• de Haas-van Alphen effect investigations of the electronic structure of pure and aluminum-doped MgB_2
• Effect of PVA doping on flux pinning in Bulk MgB2
• Mn and Fe Impurities in MgB_{2}
• Disordered two-dimensional superconductors: roles of temperature and interaction strength
• High upper critical field (120 T) with small anisotropy of highly hydrogen-substituted SmFeAsO epitaxial film
• Interorbital pair scattering in clean and impure superconductors
• Reaction method control of impurity scattering in C-doped MgB2, proving the role of defects besides C substitution level
• Non-equilibrium structural phase transitions of the vortex lattice in MgB2
• Preparation and properties of amorphous MgB${}_2$/MgO superstructures: A new model disordered superconductor
• The loss of anisotropy in MgB2 with Sc substitution and its relationship with the critical temperature
• High-pressure high-temperature solution growth, structural, and superconducting properties of Fe-substituted MgB2 single crystals
• Effect of site dilution in the two-dimensional attractive Hubbard model
• Influence of the carbon substitution on the critical current density and AC losses in MgB2 single crystals
• Is Delta_{pi}-gap-only superconductivity possible in Mg_{1-x}Al_{x}B_{2} and Mg(B_{1-y}C_{y})_{2} alloys?
• Smart meta-superconductor MgB2 constructed by inhomogeneous phase of luminescent nanocomposite
• Effects of magnetic and non-magnetic doping on the vortex lattice in MgB${}_2$
• Effect of doping on irreversible Campbell length in MgB${}_2$ single crystals
• Effect of nano-C doping on the in-situ processed MgB2 tapes
• Influence of carbon on intraband scattering in Mg(B1-xCx)2
• Discovery of a new magnesium iron boride Mg4Fe1.1B13.9 in the Mg-Fe-B-N system
• Thermal strain-induced enhancement of electromagnetic properties in SiC-MgB2 composites