スピンバルブ型CPP-GMRのMRエンハンスメント: メタルベーススピンバルブにおける磁性層の役割

Translated title of the contribution: MR enhancement of CPP-GMR in Spin-valve: Role of the ferromagnetic layers in metal-based spin-valve

湯浅 裕美, 福澤 英明, 岩崎 仁志, 高岸 雅幸, 佐橋 政司

Research output: Contribution to journalArticle

Abstract

In this report we present a method improving GMR characteristics by replacing the ferromagnetic materials of the metal-based spin-valves in current-perpendicular-to plane(CPP)geometry.A?R(the product of the element area,A,and the change in resistance,?R)was investigated for three kinds of ferromagnetic materials:Co^<90>Fe^<10>(materials A), Fe^<50>Co^<50>(materials B), and Fe^<50>Co^<50> with 0.13nm Cu layers(materials C).A?R is 1.0.mΩμm^2,1.6mΩμm^2,and 2.9mΩμm^2 for materials A,B,and C,respectively.Simple analysis using the Valet-Fert model leads to two results.The first is that both the spin-dependent interface and bulk resistance are enhanced when material A is replaced by material B.The second is that the spin-dependent bulk resistance is increased when materials B is replaced by material C.These results suggest the possibility of increasing A?R wihtout increasing the element resistance AR of spin valves in CPP geometry.
Translated title of the contributionMR enhancement of CPP-GMR in Spin-valve: Role of the ferromagnetic layers in metal-based spin-valve
Original languageJapanese
Pages (from-to)27-30
Number of pages4
JournalIEICE technical report
Volume102
Issue number355
Publication statusPublished - Sep 26 2002

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