Perpendicular anisotropy L10-FePt/Ag/[Co/Pd]30 pseudo spin valves (PSVs) with ultra-thin
L10-FePt alloy free layer possessing high anisotropy and thermal stability have been fabricated and
studied. The thickness of the L10-FePt layer was varied between 2 and 4 nm. The PSV became
increasingly decoupled with reduced L10-FePt thickness due to the larger difference between the
coercivity of the L10-FePt and [Co/Pd]30 films. The PSV with an ultra-thin L10-FePt free layer of
2 nm displayed a high Ku of 2.21 107 ergs/cm3, high thermal stability of 84 and a largest giant
magnetoresistance of 0.54%.
Copyright (2014) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 115, 17C102 (2014) and may be found at http://dx.doi.org/10.1063/1.4853175.