PdPtMn/CoFeB synthetic ferrimagnet biased spin-valves

Abstract

Spin-nlve heads with a narrower read-gap and thinner spin-valve film are necessary for achieving higher m p & c recording densities in harddisk drives. PdRMn with an ordered Cu-Au-I type srmcNre has B high blocking tempaature and high corrosion resistiviiy which are very attractive for spin-valve hcads[l]. However. a PdPtMn layer thidmess, twm p k r than 200A is essentially required for attaining an exchange pinning field rl, of 6lM Oe. Spiuvalves with synlhetic ferrimagnet hilayers as thc pi& layer have a higher H, and small readback amplitude aseven at very low clement height in ~nparim with a conventional spin-valve[Zl. In this p a p . we repat on lhe MR response of CoFeBKWCoFeB syutaic ferrimagnn biased spin-valve (ferri-SV) films with PdPtMn a m i f m p e r and present the success^ redunion oft-. to 8oA.