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VOLUME 88 (2008) | ISSUE 11 | PAGE 873
Observation of the magnetic domain structure in Cu0.47Ni0.53 thin films at low temperatures
PACS: 75.60.Ch, 75.70.-i
Abstract
We report on the first experimental visualization of domain structure in films of weakly ferromagnetic Cu0.47Ni0.53 alloy with different thickness at liquid helium temperatures. Improved high-resolution Bitter decoration technique was used to map the magnetic contrast on the surface of the films well below the Curie temperature T Curie ({\sim} 60 K). In contrast to magnetic force microscopy, this technique allowed visualization of the domain structure without its disturbance while the larger areas of the sample were probed. Maze-like domain patterns, typical for perpendicular magnetic anisotropy, were observed. The average domain width was found to be about 100 nm.