Microscopic reversal magnetization mechanisms in CoCrPt thin films with perpendicular magnetic anisotropy: Fractal structure versus labyrinth stripe domains
Name
PhysRevB.96.180403.pdf
Size
1.3 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Navas, D.
Soriano, N.
Béron, F.
Sousa, C. T.
Pirota, K. R.
Torrejon, J.
Redondo, C.
Morales, R.
Ross, Caroline A
Date Issued
November 2017
Journal
Physical Review B
Publisher
American Physical Society
Citation
Navas, D. et al. "Microscopic reversal magnetization mechanisms in CoCrPt thin films with perpendicular magnetic anisotropy: Fractal structure versus labyrinth stripe domains." Physical Review B 96, 18 (November 2017): 180403(R) © 2017 American Physical Society
Version
Final published version
Abstract
The magnetization reversal of CoCrPt thin films has been examined as a function of thickness using magneto-optical Kerr effect (MOKE) microscopy and first-order reversal curves (FORC) techniques. MOKE images show differentiated magnetization reversal regimes for different film thicknesses: while the magnetic domains in 10-nm-thick CoCrPt film resemble a fractal structure, a labyrinth stripe domain configuration is observed for 20-nm-thick films. Although FORC distributions for both cases show two main features related to irreversible processes (propagation and annihilation fields) separated by a mostly flat region, this method can nonetheless distinguish which magnetization reversal process is active according to the horizontal profile of the first FORC peak, or propagation field. A single-peak FORC profile corresponds to the fractal magnetization reversal, whereas a flat-peak FORC profile corresponds to the labyrinth magnetization reversal.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.96.180403
