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3D atom probe investigation of (Fe/Dy) magnetic multilayers
Author(s) -
Tamion A.,
Cadel E.,
Bordel C.,
Blavette D.
Publication year - 2007
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.2521
Subject(s) - atom probe , magnetometer , squid , materials science , atom (system on chip) , atomic units , evaporation , deposition (geology) , magnetic anisotropy , anisotropy , analytical chemistry (journal) , hysteresis , condensed matter physics , nuclear magnetic resonance , chemistry , magnetization , nanotechnology , magnetic field , optics , physics , computer science , biology , embedded system , thermodynamics , transmission electron microscopy , ecology , paleontology , chromatography , quantum mechanics , sediment
(Fe 3nm/Dy 2nm) 30 multilayers were deposited at 300 and 600 K by thermal evaporation under ultrahigh vacuum on (111) oriented Si substrates and investigated by SQUID magnetometry. Their hysteresis loops show that the magnetic properties strongly depend on the deposition temperature, since the perpendicular magnetic anisotropy (PMA) is much higher for the sample deposited at 600 K. To understand this phenomenon, a careful investigation of the structure and chemistry of the multilayers was carried out using a 3D atom probe. Some (Fe/Dy) multilayers were deposited on W tips at room temperature and analysed by tomographic atom probe. A 3D reconstruction and a composition profile were obtained, which made it possible to observe the structure and composition of the multilayer at the atomic scale. Copyright © 2007 John Wiley & Sons, Ltd.