Surface spin diffusion in platinum nanometer-sized crystals

I. Yu*, W. P. Halperin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Nanometer-sized crystalline platinum particles have been studied by Pt195 nuclear magnetic-resonance techniques after their removal from a silica support. The spectra show very well-resolved bulk and surface resonance peaks in contrast to supported particles of similar size. Evidence for restricted surface spin diffusion was found from spin-spin relaxation measurements performed on the surface peak. The length scale of the restriction was found to be about 10 possibly associated with surface irregularities. The nuclear-spin diffusion process can be attributed to the Ruderman-Kittel-Kasuya-Yosida indirect exchange coupling between surface Pt atoms the strength of which was found to be the same as that in bulk platinum.

Original languageEnglish (US)
Pages (from-to)15830-15834
Number of pages5
JournalPhysical Review B
Volume47
Issue number23
DOIs
StatePublished - 1993

ASJC Scopus subject areas

  • Condensed Matter Physics

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