Coexistence of ferromagnetism and superconductivity in Pb/PbO core/shell nanoparticles

Chien Kang Hsu, Daniel Hsu, Chun Ming Wu, Chi Yen Li, Chi Hang Hung, Chi Hung Lee, Wen Hsien Li

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We report on the observations of spontaneous spin polarized moments in 7.4 nm Pb/PbO nanoparticles, which give rise to re-entrantlike temperature profiles for the magnetic susceptibility and magnetization in the superconducting phase that develops below 6.86 K. Results reveal the existence of a magnetic component below TC and superconductivity remains at low temperatures. A 30-fold increase in the critical magnetic field is also found. Superconductivity mainly arises from the 5 nm Pb core, whereas the 1.2 nm PbO shell contributes to the appearance of a net magnetic moment in the 7.4 nm Pb/PbO core/shell particles.

Original languageEnglish
Article number07B528
JournalJournal of Applied Physics
Issue number7
StatePublished - 1 Apr 2011


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