FePt-Ag nanocomposite thin films with longitudinal magnetic anisotropy.
A well-controlled method to fabricate FePt thin films with the (200) texture and longitudinal magnetic anisotropy for high-density magnetic recording media is reported. FePt-Ag nanocomposite thin films with L1(0) ordered FePt grains embedded in an Ag matrix were deposited on the Cr90Ru10/glass by co-sputtering from Ag and FePt targets. The Ag doping suppressed the (001) texture but improved the L1(0) FePt (200) texture. The magnetic easy axis of FePt-Ag thin films changed from perpendicular to longitudinal in direction. In-plane coercivity of the films varied from 0.8 kOe to 6.5 kOe, depending on Ag contents in the films and under-layer thickness. The change from the (001) to (200) texture could be due to the competition of grain-boundary energy and epitaxial-strain energy.
Zhou
Y Z
YZ
Department of Materials Science, National University of Singapore, 119260, Singapore Data Storage Institute, 5 Engineering Drive 1, 117608, Singapore.
Chen
J S
JS
Chow
G M
GM
Wang
J P
JP
D016880:Anisotropy; D004560:Electricity; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D036103:Nanotechnology / Q000379:methods*; D010984:Platinum / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013637:Tape Recording / Q000295:instrumentation; D014961:X-Ray Diffraction / Q000379:methods*
D012834:Silver; D010984:Platinum; D007501:Iron