Open AccessMagnetic properties of Co-Pt-C grain films
Author(s) -
Zheng Wang,
Ailing Wang,
Jiang Hong-Wei,
Zhou Yun-Song,
Tong Li
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.2761
Subject(s) - coercivity , materials science , annealing (glass) , amorphous solid , grain size , sputtering , magnetic hysteresis , magnetic anisotropy , alloy , anisotropy , thin film , condensed matter physics , nuclear magnetic resonance , analytical chemistry (journal) , composite material , crystallography , magnetization , nanotechnology , optics , magnetic field , chemistry , physics , chromatography , quantum mechanics
Co-Pt-C grain films with in plan magnetic anisotropy and large coercivity Hc were prepared by sputtering on Si substrates in multilayer form,with post-annealing in vacuum at 700℃ for 1?h. After annealing, Co-Pt particles trans form from amorphous to fcc CoPt3 and fct CoPt, and C remains in disorder state. Effects of Pt and C concentration on the magnetic properties of the films are studied. The maximum Hc is 430kA/m when the content of Pt is 70 vol% and the thickness of C layer is 0.4nm. The shoulder developed on the hysteresis loop is analyzed.