Effects of surface topology and texture on exchange anisotropy in NiFe/Cu/NiFe/FeMn spin valves
- Effects of surface topology and texture on exchange anisotropy in NiFe/Cu/NiFe/FeMn spin valves
- 박창민; 신경호; 민경익
- Issue Date
- Journal of applied physics
- VOL 79, NO 8-6230
- We have investigated the effects of texture and interfacial roughness on the exchange anisotropy in NiFe/Cu/NiFe/FeMn spin valves with different buffer layers (no buffer, Cu, or FeMn) on Si(100) or Si(111) substrates by magnetron sputtering. The crystalline structure, surface topology, and exchange anisotropy field (H-ex) were characterized. The exchange anisotropy was established all in (111), (200), and (220) textured samples and there was no systematic relationship between the type of texture and H-ex. However, it was found that H-ex increased as the surface roughness decreased. The results lead us to believe that interfacial roughness rather than crystallographic texture controls the development of the exchange anisotropy.
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