PdPtMn スピンバルブ膜の下地の検討

概要

論文の詳細を見る
We investingated the PdPtMn bottom spin-valve, which had an high resisibity NiFeCr underlayer. The MR ratio of the NiFeCr-underlater spin-valve became 1.14 times higher than of a NiFe-underlayer, because the shunt loss of the underlayer was reduced, and the H_<ua> of the pinned layer also became higher.We found by X-ray diffraction that a PdPtMn spin-valve with a Ta/NiFeCr underlayer had a strong (111) texture. Cross-sectional TEM observation revealed that PdPtMn on a NiFeCr underlayer had a larger grain than PdPtMn on a Ta underlayer.The initial layer of the PdPtMn with the NiFeCr underlayer had a stronger (111) orientation than the PdPtMn with the Ta underlayer. To achieve a large H_<ua>, PdPtMn with a (111) texure and large grain size is required.We simulated the R-H curves of the spin-valve in the head shape. The shift in the quiescent operating point on the R-H curve was smaller for an NiFeCr underlayer than for an NiFeCr underlayer than for an NiFe one.
社団法人日本磁気学会の論文
1998-04-15