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Correlation Between the Field-Driven Microscopic Magnetization Reversal and the Disorders in Ferromagnetic Systems

Title
Correlation Between the Field-Driven Microscopic Magnetization Reversal and the Disorders in Ferromagnetic Systems
Authors
Ryu, KS[Ryu, Kwang-Su]Shin, SC[Shin, Sung-Chul]
DGIST Authors
Shin, SC[Shin, Sung-Chul]
Issue Date
2016-07
Citation
IEEE Transactions on Magnetics, 52(7)
Type
Article
Article Type
Article; Proceedings Paper
Keywords
Correlation CoefficientDomain Wall MotionDomain WallsFerromagnetic MaterialsFerromagnetic SystemsFerromagnetismField DependenceLocal CoercivityMagnetic DisorderMagnetic DisordersMagnetic StorageMagnetizationMagnetization ReversalMagnetization Reversal MechanismsNucleationThermal Activation
ISSN
0018-9464
Abstract
Understanding the field-driven microscopic magnetization reversal in a disordered ferromagnetic (FM) film is a fundamentally intriguing issue for the application of a disorder-induced magnetic memory. We present the field dependence of the correlation between local coercivity and switching time in the FM films showing two typical reversal processes: wall-motion and nucleation dominant ones. As the applied field strength increases, the correlation coefficient in the wall-motion sample decreases, whereas the one in the nucleation sample holds nearly zero value. The change in the wall-motion sample is well explained by the transition of the magnetization reversal mechanism from a thermal activation reversal to a viscous motion. This paper shows that the magnetization reversal mechanism depending on the time scale as well as the materials has a strong influence on the correlation. © 2016 IEEE.
URI
http://hdl.handle.net/20.500.11750/2248
DOI
10.1109/TMAG.2016.2523684
Publisher
Institute of Electrical and Electronics Engineers Inc.
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceETC1. Journal Articles


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