Magneto-optical investigation of local magnetic properties and micromagnetic structure of NiFe/Cu microwires

• Published in: Thin solid films Vol. 505; no. 1-2; pp. 165 - 167
• Main Authors: Shalyguina, E E, Li, X P, Seet, H L, Abrosimova, N M, Shalygin, A N
• Format: Journal Article
• Language: English
• Published: 18-05-2006
• ISSN: 0040-6090
• DOI: 10.1016/j.tsf.2005.10.031

Near-surface local magnetic properties and micromagnetic structure of electroplated composite NiFe/Cu microwires were studied employing magneto-optical micro-magnetometer. By scanning the light spot of 1 mum diameter along the wire length L, distributions of the magnetization components and local magnetization curves were measured. It was discovered that in all examined wires, the near-surface local magnetization components, parallel to the magnetic field, have the same sign, and those, perpendicular to H, have oscillatory, alternating-sign behavior. These data showed the presence of the near-surface circular domains with alternating left- and right-handled magnetization. It was experimentally proved that the dominant mechanism of the magnetization reversal of the studied wires is the magnetization rotation.