自旋阀(spin valve).一无耦合三明治 20AAg 100 A FeMn Pinning layer RT H in plane EA Pinned layer 0 150 A NiFe -2 (a 26 A Cu 2.5 RT 20 Free layer H in plane l EA 150 A NiFe 是15 1.0 0.5 0 Si substrate -200 0 200 H(oe】 >较厚的NM层取消AF层间耦合；AF层钉扎作用。1%/Oe >Stuart S.P.Parkin对GMR的重要贡献。MBE→sputtering B.Dieny and S.S.P.Parkin,et al,Phys.Rev.B43(1991)403.自旋阀（spin valve）－无耦合三明治 ➢ 较厚的NM层取消AF层间耦合；AF层钉扎作用。1%/Oe ➢ Stuart S. P. Parkin对GMR的重要贡献。MBE sputtering B. Dieny and S. S. P. Parkin, et al, Phys. Rev. B43 (1991) 403. 100 Å FeMn 150 Å NiFe 150 Å NiFe Si substrate 20 Å Ag Pinning layer Pinned layer Free layer 26 Å Cu