Curie temperature modulated structure to improve the performance in heat-assisted magnetic recording
- Author(s)
- O. Muthsam, C. Vogler, D. Suess
- Abstract
We investigate how a temperature reduction in z-direction influences the switching probability and the noise in heat-assisted magnetic recording (HAMR) for a bit in bit-patterned media with dimensions nm and nm. Pure hard magnetic bits are considered and simulations with a continuous laser pulse are performed using the atomistic simulation tool VAMPIRE. The results display that the switching behavior shows a thermally induced exchange spring effect. Simultaneously, both the AC and the DC noise increase. Additionally, we illustrate how an artificial Curie temperature gradient within the material can compensate the HAMR performance loss due to the temperature gradient. Further, due to the graded Curie temperature, DC noise can be reduced compared to a structure where no temperature gradient is considered.
- Organisation(s)
- Physics of Functional Materials
- Journal
- Journal of Magnetism and Magnetic Materials
- Volume
- 474
- Pages
- 442-447
- No. of pages
- 6
- ISSN
- 0304-8853
- DOI
- https://doi.org/10.1016/j.jmmm.2018.11.035
- Publication date
- 03-2019
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Condensed Matter Physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/curie-temperature-modulated-structure-to-improve-the-performance-in-heatassisted-magnetic-recording(a9441d65-bf5b-43a0-bedf-254e14444895).html