Enhanced critical magnetic field in superconducting Pb nanoparticles

C. C. Yang, F. C. Tsao, S. Y. Wu, W. H. Li, K. C. Lee

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Pb nanoparticles in a powder form has been successfully fabricated by employing the gas condensation method. Analyses based on the x-ray diffraction profiles and the AFM images showing a mean particle size of 6 nm, with a relatively narrow size distribution of half-width 1.5 nm, for the powder. It is known that bulk Pb has a superconducting transition temperature of TC=7.2 K and a critical magnetic field of HC=803 gauss. Magnetic susceptibility and electrical resistance measurements show that TC of the 6 nm Pb nanoparticles reduces to 6.6 K, which was found to be extremely insensitive to the applied magnetic field. Screening diamagnetic responses remains even at Ha=9 T with which TC=6 K.

Original languageEnglish
Pages (from-to)349-352
Number of pages4
JournalJournal of Low Temperature Physics
Volume131
Issue number3-4
DOIs
StatePublished - May 2003

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