Magnetic State Estimator to Characterize the Magnetic States of Nano-Magnetic Disks

We present an image processing system-magnetic state estimator (MSE) to estimate the magnetization states of lithographically patterned single domain nano-magnets. The tool requires digital images of a magnetic force micrograph, an atomic force micrograph and a computer-aided design layout of the ma...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2013-07, Vol.49 (7), p.3545-3548
Main Authors: Panchumarthy, Ravi, Karunaratne, Dinuka K., Sarkar, Sudeep, Bhanja, Sanjukta
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Design automation
Exact sciences and technology
Image processing
Layout
Magnetic domains
magnetic force micromagraph (MFM)
Magnetic recording
Magnetic resonance imaging
Magnetism
Magnetization
Materials science
nano-magnetic disks
Nanostructures
Other topics in materials science
Physics
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Description
Summary:We present an image processing system-magnetic state estimator (MSE) to estimate the magnetization states of lithographically patterned single domain nano-magnets. The tool requires digital images of a magnetic force micrograph, an atomic force micrograph and a computer-aided design layout of the magnetic nanostructures to estimate their magnetization states. The tool also yields a confidence value of the estimated magnetization state. We have tested the MSE on randomly patterned Permalloy nano-magnetic disks on a Silicon wafer. The tool was able to correctly identify 403 single domain states out of 499 and 256 vortex states out of 297, producing an accuracy rate of 83%.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2013.2240441