Title :
Enhanced GMR in PtMn-based spin valves with specular reflective thin oxide layers
Author :
Sakakima, H. ; Satomi, M. ; Kawawake, Y. ; Adachi, H.
Author_Institution :
Adv. technol. Res. Lab., Matsushita Electr. Ind. Co. Ltd., Kyoto
fDate :
9/1/2000 12:00:00 AM
Abstract :
PtMn based Spin-valves with or without specular reflective thin oxide layers, OL, were prepared by sputtering. The MR ratios and ΔRs of the spin-valves without OL were about 8% and 1.2 Ω. The values were increased up to 12-15% and ⊇2.6 Ω by inserting an OL into the pinned and free layers. PtMn based spin-valves with synthetic AF and OL as the pinning layers were also studied. The MR ratio and ΔRs were about 11% and 2.9 Ω. These PtMn based spin-valves showed better thermal stability than IrMn based spin-valves
Keywords :
giant magnetoresistance; manganese alloys; platinum alloys; spin valves; sputtered coatings; thermal stability; PtMn; PtMn spin valve; giant magnetoresistance; specular reflective oxide layer; sputtering; synthetic antiferromagnetic pinning layer; thermal stability; Annealing; Antiferromagnetic materials; Iron; Magnetic field measurement; Magnetic heads; Scattering; Spin valves; Sputtering; Substrates; Thermal stability;
Journal_Title :
Magnetics, IEEE Transactions on
