Observation of the magnetic domain structures in Cu\(_{0,47}\)Ni\(_{0,53}\) thin films at low temperatures

We report on the first experimental visualization of domain structure in films of weakly ferromagnetic Cu\(_{0,47}\)Ni\(_{0,53}\) alloy with different thickness at liquid helium temperatures. Improved high-resolution Bitter decoration technique was used to map the magnetic contrast on the top of the...

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Bibliographic Details
Published in:arXiv.org 2008-11
Main Authors: Veshchunov, I S, Oboznov, V A, Rossolenko, A N, Prokofiev, A S, L Ya Vinnikov, A Yu Rusanov, Matveev, D V
Format: Article
Language:English
Subjects:
Copper
Curie temperature
Ferromagnetic materials
Liquid helium
Magnetic anisotropy
Magnetic domains
Magnetic fields
Magnetism
Nickel
Thin films
Visualization
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Summary:We report on the first experimental visualization of domain structure in films of weakly ferromagnetic Cu\(_{0,47}\)Ni\(_{0,53}\) alloy with different thickness at liquid helium temperatures. Improved high-resolution Bitter decoration technique was used to map the magnetic contrast on the top 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.
ISSN:2331-8422
DOI:10.48550/arxiv.0811.2331