Magnetization and electric transport properties of single-crystal MgB2 nanowires

High quality single-crystal magnesium diboride (MgB2) nanowires with lengths exceeding 10 μm were successfully synthesized by hybrid physical chemical vapor deposition. The magnetization and electrical transport properties of single-crystal MgB2 nanowires (NWs) were measured. The superconducting tra...

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Bibliographic Details
Published in:Nanotechnology 2012-11, Vol.23 (46), p.465706-465706
Main Authors: Wu, Cen-Shawn, Chang, Yu-Cheng, Chen, Weimeng, Chen, Chinping, Feng, Qingrong
Format: Article
Language:English
Online Access:Get full text
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Summary:High quality single-crystal magnesium diboride (MgB2) nanowires with lengths exceeding 10 μm were successfully synthesized by hybrid physical chemical vapor deposition. The magnetization and electrical transport properties of single-crystal MgB2 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 MgB2 NWs.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/23/46/465706