Susceptibility of Fe atoms in Cu clusters

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

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Abstract

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
Volume113
Issue number17
DOIs
Publication statusPublished - May 7 2013

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Zhang, R., George, T. A., Kharel, P., Skomski, R., & Sellmyer, D. J. (2013). Susceptibility of Fe atoms in Cu clusters. Journal of Applied Physics, 113(17), [17E148]. https://doi.org/10.1063/1.4799617