Curie temperature modulated structure to improve the performance in heat-assisted magnetic recording

Autor(en)

O. Muthsam, C. Vogler, D. Suess

Abstrakt

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(en)

Physik Funktioneller Materialien

Journal

Journal of Magnetism and Magnetic Materials

Band

474

Seiten

442-447

Anzahl der Seiten

6

ISSN

0304-8853

DOI

https://doi.org/10.1016/j.jmmm.2018.11.035

Publikationsdatum

03-2019

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/a9441d65-bf5b-43a0-bedf-254e14444895