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Sputtering of cobalt film with perpendicular magnetic anisotropy on disorder-free graphene
Author(s) -
Mahdi Jamali,
Yang Lv,
Zhengyang Zhao,
JianPing Wang
Publication year - 2014
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4897333
Subject(s) - graphene , materials science , raman spectroscopy , cobalt , graphene nanoribbons , sputtering , magnetic anisotropy , condensed matter physics , thin film , graphene oxide paper , sputter deposition , anisotropy , nanotechnology , magnetization , optics , magnetic field , metallurgy , physics , quantum mechanics
Growth of thin cobalt film with perpendicular magnetic anisotropy has been investigated on pristine graphene for spin logic and memory applications. By reduction of the kinetic energy of the sputtered atoms using indirect sputtered deposition, deposition induced defects in the graphene layer have been controlled. Cobalt film on graphene with perpendicular magnetic anisotropy has been developed. Raman spectroscopy of the graphene surface shows very little disorder induced in the graphene by the sputtering process. In addition, upon increasing the cobalt film thickness, the disorder density increases on the graphene and saturates for thicknesses of Co layers above 1 nm. The AFM image indicates a surface roughness of about 0.86 nm. In addition, the deposited film forms a granular structure with a grain size of about 40 nm

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