Unified picture of spin-dependent transport in GMR multilayered structures and bulk ferromagnetic alloys

P. A. Schroeder*, P. Holody, R. Loloee, C. Vouille, A. Barthelemy, A. Fert, Shih-ying Hsu

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

We have observed a positive (inverse) CPP-MR in magnetic multilayers of the forms: (a) (XY/Cu/Co/Cu)n with XY being the alloys FeCr, FeV, NiCr, CoCr, and (b) (Z/Cr/NiFe/Cr)n with Z = Fe and Co. For (a) the inverted results arise primarily from spin-dependent scattering in the bulk of the alloy, and are linked consistently to: (1) their magnetization; (2) band-structure calculations and (3) resistivity of bulk alloys. For (b) samples, the inverse MRs arise primarily from the scattering at the Fe/Cr and Co/Cr interfaces. Inverse MR for X/Y interfaces and XY alloys (eg. Fe/Cr and FeCr) arises from the similarity of the matching problem of X and Y d levels at interfaces and in alloys. For all XY the CIP-MR was negative, confirming that CIP-MR is strongly influenced by channeling effect and current inhomogenieties.

Original languageEnglish
Pages (from-to)1464-1465
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume177-181
Issue numberPART 2
DOIs
StatePublished - 1 Jan 1998

Keywords

  • 3d metals
  • Magnetic moments
  • Magnetoresistance
  • Multilayers
  • Spin-dependent scattering

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