Single crystal MgB2 with anisotropic superconducting properties

Abstract

The discovery of superconductor in magnesium diboride MgB2 with high Tc (39 K) has raised some challenging issues; whether this new superconductor resembles a high temperature cuprate superconductor(HTS) or a low temperature metallic superconductor; which superconducting mechanism, a phonon- mediated BCS or a hole superconducting mechanism or other new exotic mechanism may account for this superconductivity; and how about its future for applications. In order to clarify the above questions, experiments using the single crystal sample are urgently required. Here we have first succeeded in obtaining the single crystal of this new MgB2 superconductivity, and performed its electrical resistance and magnetization measurements. Their experiments show that the electronic and magnetic properties depend on the crystallographic direction. Our results indicate that the single crystal MgB2 superconductor shows anisotropic superconducting properties and thus can provide scientific basis for the research of its superconducting mechanism and its applications.

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References in corpus (10)

• Superconductivity of metallic boron in MgB_2
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• Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB2 thin films
• Anisotropic superconducting properties of aligned MgB2 crystallites
• Hole Superconductivity in $Mg{B}_2$: a high $T_c$ cuprate without Cu
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Cited by in corpus (67)

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• Synthesis and Properties of c-axis Oriented Epitaxial MgB2 Thin Films
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• Superconducting anisotropy and evidence for intrinsic pinning in single crystalline MgB${}_2$
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• Significant Reduction of the Microwave Surface Resistance of MgB2 Films by Surface Ion Milling
• Origin of superconductivity transition broadening in MgB2
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• High quality MgB2 thin films in-situ grown by dc magnetron sputtering
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• Thermodynamics of anisotropic-gap and multiband clean BCS superconductors
• A magnetization and ${}^{11}$B NMR study of Mg${}_{1-x}$Al${}_x$B${}_2$ superconductors
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• Subharmonic gap structures and Josephson effect in MgB2/Nb micro-constrictions
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• A general interpolation scheme for thermal fluctuations in superconductors
• Comparative Study of the Electronic Structure of Alkaline-earth Borides (MeB2; Me=Mg, Al, Zr, Nb, and Ta) and their Normal-State Conductivity
• Fluctuation Study of the Specific Heat of MgB2
• New heat treatment to prepare high quality polycrystalline and single crystal MgB2 in single process
• A Magnetization and Microwave Study of Superconducting MgB2
• High magnetic field superconductivity in a two-band superconductor
• Broadening of In-Field Superconducting Transitions in Hydrides
• Thick MgB2 film with (101) oriented micro-crystals
• Electrical transport properties of bulk MgB2 materials synthesized by the electrolysis on fused mixtures of MgCl2, NaCl, KCl and MgB2O4
• Comment on "Anisotropic s-wave superconductivity in MgB_2"
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• Comparative Study of Dense Bulk MgB${}_2$ Materials Prepared by Different Methods
• Preparation and properties of amorphous MgB${}_2$/MgO superstructures: A new model disordered superconductor
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• Comment on "Superconducting anisotropy and evidence for intrinsic pinning in single crystalline MgB2"
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