Magnetization and electric transport properties of single-crystal MgB2 nanowires
Autor: | Qingrong Feng, Chinping Chen, Weimeng Chen, Cen-Shawn Wu, Yu Cheng Chang |
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Rok vydání: | 2012 |
Předmět: |
Superconductivity
Materials science Condensed matter physics Hybrid physical-chemical vapor deposition Mechanical Engineering Nanowire Bioengineering General Chemistry Variable-range hopping Magnetization chemistry.chemical_compound chemistry Mechanics of Materials Electrical resistivity and conductivity Magnesium diboride General Materials Science Electrical and Electronic Engineering Single crystal |
Zdroj: | Nanotechnology. 23(46) |
ISSN: | 1361-6528 |
Popis: | High quality single-crystal magnesium diboride (MgB(2)) nanowires with lengths exceeding 10 μm were successfully synthesized by hybrid physical chemical vapor deposition. The magnetization and electrical transport properties of single-crystal MgB(2) nanowires (NWs) were measured. The superconducting transition temperature of the NWs was 37 K, as confirmed by magnetization measurements. The disordered behavior of the nanowires was observed by four-terminal current-voltage characteristic measurements of an individual NW from T = 10 to 300 K. The temperature-dependent resistivity curves for seven NWs collapsed into a universal curve described by the variable range hopping model, showing intrinsic nonmetallic transport properties. This implies that the granular superconducting defect states are critical to the superconductivity of the individual MgB(2) NWs. |
Databáze: | OpenAIRE |
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