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American Physical Society, Physical Review Letters, 23(91)

DOI: 10.1103/physrevlett.91.237203

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Ferromagnetism in fcc Twinned 2.4 nm Size Pd Nanoparticles

Journal article published in 2003 by B. Sampedro, P. Crespo, A. Hernando ORCID, R. Litrán, J. C. Sánchez López ORCID, C. López Cartes, A. Fernandez ORCID, J. Ramírez, J. M. González Calbet, M. Vallet
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This paper is available in a repository.

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Abstract

The onset of ferromagnetism has been experimentally observed in small Pd particles of average diameter 2.4 nm. High-resolution studies reveal that a high percentage of the fcc particle exhibits single and multiple twinning boundaries. The spontaneous magnetization close to 0.02 emu/g seems to indicate that only a small fraction of atoms holds a permanent magnetic moment and contributes to ferromagnetism. The possible origin of ferromagnetism is briefly discussed according to different models recently reported.