Open AccessEffect of Ag and Ti underlayer on the ordering in Fe/Pt multilayers
Author(s) -
Chun Feng,
Baohe Li,
Jun Teng,
Tao Yang,
Guo Yu
Publication year - 2005
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.54.4898
Subject(s) - coercivity , materials science , annealing (glass) , sputter deposition , remanence , thin film , analytical chemistry (journal) , magnetization , condensed matter physics , sputtering , saturation (graph theory) , composite material , nanotechnology , magnetic field , chemistry , physics , chromatography , quantum mechanics , mathematics , combinatorics
The Fe/Pt multilayers with Ag,Ti,Cu,Cr,Pt and Ta underlayers were prepared by DC magnetron sputtering on the heated glass substrates.After vacuum annealing at d ifferent temperatures, the FePt thin films with L1 ordering phase ( L1-FePt) were obtained. Results showed that the Ag and Ti underlaye r prompt the ordering of FePt thin films, and the ordering temperature of FePt- L1 phase is reduced by at least 150℃. It is also worth noting tha t the annealing time is shorter and the magnetic performance is excellent. The m agnetic performance of samples with Ag underlayer is not sensitive to temperatur e at relative higher annealing temperature, whereas the coercivity of samples wi th Ti underlayer decreases obviously when the annealing temperature is higher th an 500℃. After annealing at 400℃ for 20 min, the in-plane coercivity of sample s with Ag and Ti underlayer can be as high as 597kA/m, and 654kA/m respectivel y, and the ratio of remanent magnetization to saturation magnetization reaches 0 .81 and 0.94, respectively, implying the potential of the films as future magnet ic recording media of ultrahigh density.