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 language | English |
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Pages (from-to) | 1464-1465 |
Number of pages | 2 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 177-181 |
Issue number | PART 2 |
DOIs | |
State | Published - 1 Jan 1998 |
Keywords
- 3d metals
- Magnetic moments
- Magnetoresistance
- Multilayers
- Spin-dependent scattering