PdPtMn/CoFeB synthetic ferrimagnet spin-valve heads

We deposited spin-valve films with a CoFeB/Ru/CoFeB synthetic ferrimagnet p inned trilayer and a PdPtMn anti-ferromagnet layer and investigated their M R responses. We also fabricated spin-valve heads having a Ta(50 Angstrom)/N iFe(20 Angstrom)/CoFeB(15 Angstrom)/Cu(30 Angstrom)/CoFeB(25 Angstrom)/Ru(8 Angstrom)/CoFeB(15 Angstrom)/PdPtMn(150 Angstrom)/Ta(60 Angstrom) syntheti c ferrimagnet spin-valve film. We tested the read/write performance on a lo w noise CoCrPt-based quaternary alloy thin-film disk A narrow, effective re ad track-width of less than 0.4 mu m was measured. We obtained a normalized output with respect to track-width of 2500 mu Vpp/mu m. Using a EPR4ML cha nnel with a 16/17 code and an inductive head with a track-width of 0.45 mu m we found a bit error rate to be less than 3.45 x 10(-6) without error cor rection at a data rate of 13.3 MB/s and at a linear density of 405 kBPI on the similar disk Furthermore, from squeeze measurements, we found the track -pitch to be 0.505 mu m, which corresponds to a track density of 50.3 kTPI. As a result, we accomplished an areal density of 20.4 Gbit/in(2) with a li near density of 405 kBPI and a track density of 50.3 kTPI using PdPtMn/CoFe B synthetic ferrimagnet spin-valve heads.