Sampedro, B.Crespo del Arco, PatriciaHernando Grande, AntonioLitran, R.Sánchez López, J. C.López Cartes, C.Fernández, A.Ramírez, J.González Calbet, José MaríaVallet, M.2023-06-202023-06-202003-12-050031-900710.1103/PhysRevLett.91.237203https://hdl.handle.net/20.500.14352/52028©2003 The American Physical Society.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.engjournal articlehttp://dx.doi.org/10.1103/PhysRevLett.91.237203https://journals.aps.orgopen access538.9High-resolution temElectronic-structurePalladium clusters4d FerromagnetismTransitionMagnetismFísica de materialesFísica del estado sólido2211 Física del Estado Sólido