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1997 | 92 | 2 | 469-472
Article title

On Temperature Dependence of Domain Structure in Cobalt

Content
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Languages of publication
EN
Abstracts
EN
The type-I magnetic contrast in a scanning electron microscope is used to study the domain behaviour on the basal planes of cobalt monocrystals of different thicknesses during a heating cycle. Digital image processing is applied to the original scanning electron microscope images for their restoration, enhancement and analysis. The main reasons for the application of digital image processing are: low level of type-I magnetic contrast, particularly used at the higher temperatures, and the complex character of the magnetic domain structure. The changes in both domain structures and type-I magnetic contrast are due to the strong temperature dependence of magnetocrystalline anisotropy energy for the hcp phase of cobalt, which implies the rotation of magnetic easy axis from the c-axis to the basal plane. The temperature of the magnetic phase transition between an open-flux and a closed-flux domain configuration was found to be dependent on the specimen thickness. The changes in domain structure during the heating cycle were reversible under the condition that the specimen was not carried through the hcp-to-fcc phase transition. Otherwise, they were partially or completely irreversible and were caused by crystal imperfections originating from the transition. The paper shows the great advantage of using digital image processing system for data restoration, enhancement and analysis.
Keywords
EN
Publisher

Year
Volume
92
Issue
2
Pages
469-472
Physical description
Dates
published
1997-08
Contributors
author
  • Department of Solid State Physics, University of Łódź, Pomorska 149/153, 90-236 Łódź, Poland
author
  • Department of Solid State Physics, University of Łódź, Pomorska 149/153, 90-236 Łódź, Poland
author
  • Department of Solid State Physics, University of Łódź, Pomorska 149/153, 90-236 Łódź, Poland
References
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Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv92z250kz
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