Model of advanced recording system for application in heat-assisted magnetic recording
Abstract Heat assisted magnetic recording (HAMR) technology is considered a solution to overcome the limitations of perpendicular magnetic recording and enable higher storage densities. To improve and understand the performance of magnetic writers in HAMR technology, it is crucial to possess a compr...
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| Format: | Article |
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-87044-1 |
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| author | Wasan Pantasri Andrea Meo Phanwadee Chureemart Asanee Suntives Kotchakorn Pituso Roy W. Chantrell Jessada Chureemart |
| author_facet | Wasan Pantasri Andrea Meo Phanwadee Chureemart Asanee Suntives Kotchakorn Pituso Roy W. Chantrell Jessada Chureemart |
| author_sort | Wasan Pantasri |
| collection | DOAJ |
| description | Abstract Heat assisted magnetic recording (HAMR) technology is considered a solution to overcome the limitations of perpendicular magnetic recording and enable higher storage densities. To improve and understand the performance of magnetic writers in HAMR technology, it is crucial to possess a comprehensive understanding of both the magnetic field generated during the writing process and the thermal effects induced by the laser. In this work, we have developed a micromagnetic HAMR model with atomistic parameterization. To demonstrate the applicability of the developed model, it is employed to investigate the Write Current Assisted Percentage (WCAP) measurement which is characterized by the difference in laser current needed to erase a narrow data track with and without assistance of the magnetic field generated by the writer. This value allows us to subsequently consider the strength of the magnetic field from the writer, which is difficult to evaluate experimentally. We study the effect of crucial factors such as the laser current, the frequency of the writing field and the grain size distribution of the recording media on the WCAP. The results reveal that, under a high applied field, a correspondingly elevated WCAP is generated. This observation suggests that the track undergoes erasure to approximately half of its amplitude, achieved through the utilization of a low peak temperature. The comparison between simulation and experimental data demonstrates excellent agreement and acts as a validation of the underlying principle of WCAP. Additionally, we explore theoretically the impact of the writer frequency, and the results suggest that lower frequencies give rise to an increase in WCAP. This implies that lower frequencies allow for a reduction in temperature required to erase the track. The technique is valuable in evaluating and contrasting the magnetic behavior of various write pole configurations, examining the frequency responses of different designs, and comparing different media. |
| format | Article |
| id | doaj-art-f1eece9cc3174a25a822bd4993214471 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-f1eece9cc3174a25a822bd49932144712025-01-26T12:30:49ZengNature PortfolioScientific Reports2045-23222025-01-0115111210.1038/s41598-025-87044-1Model of advanced recording system for application in heat-assisted magnetic recordingWasan Pantasri0Andrea Meo1Phanwadee Chureemart2Asanee Suntives3Kotchakorn Pituso4Roy W. Chantrell5Jessada Chureemart6Department of Physics, Mahasarakham UniversityDepartment of Physics, Mahasarakham UniversityDepartment of Physics, Mahasarakham UniversitySeagate TechnologySeagate TechnologyDepartment of Physics, Mahasarakham UniversityDepartment of Physics, Mahasarakham UniversityAbstract Heat assisted magnetic recording (HAMR) technology is considered a solution to overcome the limitations of perpendicular magnetic recording and enable higher storage densities. To improve and understand the performance of magnetic writers in HAMR technology, it is crucial to possess a comprehensive understanding of both the magnetic field generated during the writing process and the thermal effects induced by the laser. In this work, we have developed a micromagnetic HAMR model with atomistic parameterization. To demonstrate the applicability of the developed model, it is employed to investigate the Write Current Assisted Percentage (WCAP) measurement which is characterized by the difference in laser current needed to erase a narrow data track with and without assistance of the magnetic field generated by the writer. This value allows us to subsequently consider the strength of the magnetic field from the writer, which is difficult to evaluate experimentally. We study the effect of crucial factors such as the laser current, the frequency of the writing field and the grain size distribution of the recording media on the WCAP. The results reveal that, under a high applied field, a correspondingly elevated WCAP is generated. This observation suggests that the track undergoes erasure to approximately half of its amplitude, achieved through the utilization of a low peak temperature. The comparison between simulation and experimental data demonstrates excellent agreement and acts as a validation of the underlying principle of WCAP. Additionally, we explore theoretically the impact of the writer frequency, and the results suggest that lower frequencies give rise to an increase in WCAP. This implies that lower frequencies allow for a reduction in temperature required to erase the track. The technique is valuable in evaluating and contrasting the magnetic behavior of various write pole configurations, examining the frequency responses of different designs, and comparing different media.https://doi.org/10.1038/s41598-025-87044-1 |
| spellingShingle | Wasan Pantasri Andrea Meo Phanwadee Chureemart Asanee Suntives Kotchakorn Pituso Roy W. Chantrell Jessada Chureemart Model of advanced recording system for application in heat-assisted magnetic recording Scientific Reports |
| title | Model of advanced recording system for application in heat-assisted magnetic recording |
| title_full | Model of advanced recording system for application in heat-assisted magnetic recording |
| title_fullStr | Model of advanced recording system for application in heat-assisted magnetic recording |
| title_full_unstemmed | Model of advanced recording system for application in heat-assisted magnetic recording |
| title_short | Model of advanced recording system for application in heat-assisted magnetic recording |
| title_sort | model of advanced recording system for application in heat assisted magnetic recording |
| url | https://doi.org/10.1038/s41598-025-87044-1 |
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