Strungaru, M., Nguyen, B. T., Yuanmae, K. et al. (4 more authors) (2022) HAMR switching dynamics and the magnetic recording quadrilemma. Journal of Magnetism and Magnetic Materials. 170041. ISSN 0304-8853
Abstract
We investigate the dynamical switching process of Heat Assisted Magnetic Recording (HAMR) by numerical calculations of switching probability using an atomistic model. Calculations show that at the elevated write temperature of HAMR there is a loss of information arising from ’backswitching’: a thermodynamic phenomenon which comes into play when the ratio of the Zeeman energy to the thermal energy is insufficiently large to completely stabilise the switched direction. We consider the special case of Heated Dot Magnetic Recording, where a reduction of switching probability can be related to a bit error rate. We show that the backswitching becomes more pronounced at faster write times. Also, we show that in the case of current recording media, based on the binary alloy FePt, backswitching will be a more stringent limitation on recording density than the usually assumed thermal stability criterion.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors |
Keywords: | Bit error rate,Heat-Assisted Magnetic Recording,Heated Dot Magnetic Recording,Magnetisation switching |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 01 Nov 2022 16:40 |
Last Modified: | 10 Nov 2024 01:28 |
Published Version: | https://doi.org/10.1016/j.jmmm.2022.170041 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.jmmm.2022.170041 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:192872 |
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