Origin of Orbital Ferromagnetism and Giant Magnetic Anisotropy at the Nanoscale | Zendy

A. Hernando | Zendy; P. Crespo | Zendy; M. A. Garcı̀a | Zendy

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Origin of Orbital Ferromagnetism and Giant Magnetic Anisotropy at the Nanoscale

Author(s) -

A. Hernando,

P. Crespo,

M. A. Garcı̀a

Publication year - 2006

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.96.057206

Subject(s) - condensed matter physics , ferromagnetism , spin–orbit interaction , magnetism , materials science , monolayer , magnetic anisotropy , magnetic moment , angular momentum , anisotropy , radius , atom (system on chip) , coupling (piping) , anisotropy energy , spin (aerodynamics) , orbit (dynamics) , surface energy , physics , magnetization , nanotechnology , magnetic field , optics , classical mechanics , quantum mechanics , computer security , engineering , aerospace engineering , computer science , metallurgy , composite material , thermodynamics , embedded system

The origin of orbital magnetism recently observed in different nanostructured films and particles is discussed as a consequence of spin-orbit coupling. It is shown that contact potentials induced at the thin film surface by broken symmetries, as domain boundaries in self-assembled monolayers, lead to orbital states that in some cases are of large radius. The component of the angular momentum normal to the surface can reach very high values that decrease the total energy by decreasing spin-orbit interaction energy. Intraorbital ferromagnetic spin correlations induce orbital momenta alignment. The estimated values of the magnetic moments per atom are in good agreement with the experimental observations in thiol capped gold films and nanoparticles

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