Anomalous magnetoresistance near superconducting transition temperature in a mesoscopic aluminum wire

Seongjae Lee, Kyoung Wan Park, Mincheol Shin, El Hang Lee, Hyuk Chan Kwon

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

We have observed an anomalous magnetoresistance (MR) in a mesoscopic aluminum wire near the superconducting transition temperature. The anomaly exists in a region of low magnetic field less than 12.5 G and within the narrow temperature region where the Ginzburg-Landau coherence length exceeds half the distance between the voltage probes. It consists of a "mesa" or "peak"-type MR centered around zero field (negative MR) with zero resistance outside the field region; in other words, the sample undergoes a normal-superconducting-normal transition as the magnetic field increases. Satellite peaks around the mesa MR were also observed for a very narrow range of temperature. We speculate that the sample size and dimensionality play an important role in these phenomena, but the origin is unclear.

Original languageEnglish
Pages (from-to)4353-4356
Number of pages4
JournalJapanese Journal of Applied Physics
Volume34
Issue number8
DOIs
StatePublished - 1995 Aug

Keywords

  • Anomalous magnetoresistance
  • One-dimensional superconductivity
  • Superconducting fluctuation

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