Susceptibility of Fe atoms in Cu clusters

Rui Zhang, Tom A. George, Parashu Kharel, Ralph Skomski, D. J. Sellmyer

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


By putting a Kondo system of limited dimension inside an insulating matrix, the Kondo screening cloud is confined by the size of the system. This allows us to distinguish the bulk and nano-particle behaviors of such system. We have investigated the magnetic properties of 0.3 at. Fe-doped Cu clusters with dimensions less than 20 nm embedded in a SiO2 matrix. The magnetic measurements are consistent with the Kondo interaction, and net antiferromagnetic Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions between several Fe atoms in one cluster are estimated to have a very small effect. To understand the low-temperature susceptibility reduction, we compare Brillouin functions with exact quantum-mechanical solutions for interacting spin-1 particles and with the Kondo predictions for confined nanoparticles.

Original languageEnglish (US)
Article number17E148
JournalJournal of Applied Physics
Issue number17
StatePublished - May 7 2013

ASJC Scopus subject areas

  • General Physics and Astronomy


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