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

Author

Panchumarthy, Ravi ; Karunaratne, Dinuka K. ; Sarkar, Santonu ; Bhanja, Sanjukta

Author_Institution

Dept. of Comput. Sci. & Eng., Univ. of South Florida, Tampa, FL, USA

Volume

49

Issue

7

fYear

2013

fDate

Jul-13

Firstpage

3545

Lastpage

3548

Abstract

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%.

Keywords

Permalloy; atomic force microscopy; magnetic disc storage; magnetic force microscopy; magnetisation; nanomagnetics; NiFe; Permalloy; atomic force micrograph; computer aided design; confidence value; image processing system; lithographically patterned single domain nanomagnet; magnetic force micrograph; magnetic state estimator; magnetization state; nanomagnetic disk; Design automation; Layout; Magnetic domains; Magnetic recording; Magnetic resonance imaging; Magnetization; Nanostructures; Image processing; magnetic force micromagraph (MFM); nano-magnetic disks;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2240441

Filename

6559147