Magnetic properties of carbon-doped FePt nanogranular films

Perumal, A.; Hyun-Seok Ko, A.; Sung-Chul Shin
October 2003
Applied Physics Letters;10/20/2003, Vol. 83 Issue 16, p3326
Academic Journal
The room-temperature magnetic properties and magnetization reversal process of ordered (FePt)[sub 1-x]C[sub x] thin films, prepared by a cosputtering technique on MgO (100) substrates held at 400 °C substrate temperature, have been studied. Perpendicular magnetic anisotropy was obtained for the films with carbon concentrations up to 25 vol % and coercivity enhancement was observed with small carbon-doped FePt thin films. A clear spin-reorientation transition from perpendicular to the in-plane direction was observed with an increase in carbon concentration. The observed magnetic properties are intercorrelated to microstructural changes that occur as a function of the carbon doping. © 2003 American Institute of Physics.


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