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Magnetic Field Effect on the Transport Properties of Quaternary Intermetallic Superconductor YNi2B2C

並列摘要


The mixed state of intermetallic superconductor YNi2B2C, like that of high-T, materials, is found to be separated into vortex solid and vortex liquid phases due to its large fluctuations. In addition, the vortex solid phase changes from a vortex lattice at low fields to a vortex glass at high fields. A very sharp resistive transition with a kink and an S-shaped I - V curve are observed in the vortex lattice transition region, H ≤ 1 T. At high fields, H ≥ 2 T, a scaling law holds for the vortex glass transition in R -- T and I - V curves, with field-independent critical exponents, v = 1.23 f 0.02 and z = 5.46 ± 0.32.

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