7 February 2001 Thermal stability in magneto-optical recording media: analysis of magnetization decay
Author Affiliations +
Proceedings Volume 4085, Fifth International Symposium on Optical Storage (ISOS 2000); (2001) https://doi.org/10.1117/12.416811
Event: Fifth International Symposium on Optical Storage (IS0S 2000), 2000, Shanghai, China
Abstract
Thermal stability of amorphous TbFeCo monolayers and {TbFeCo/Pt} multilayers is studied by magnetic viscosity measurements M(t). Using, isothermal remanence measurements the relationship between the magnetization reversal process and its time dependence has been investigated. The non-linear evolution of magnetization with ln(time) happens when the mechanism responsible for magnetization reversal process is mainly domain nucleation. On the other hand domain wall motion process induces a linear M(t) behavior. For multilayers with very small Pt thickness (samples with high square hysteresis loop), magnetization time decay can be described easily by a single energy barrier EB model. As Pt thickness increases, distribution of EB becomes wider leading to almost linear magnetization decay with ln(time) as in longitudinal recording media. The activation volume is determined for these media and shows a strong correlation with reversing field, thus yielding variations of stability over a written bit.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rachid Sbiaa, Rachid Sbiaa, Mitsunori Mochida, Mitsunori Mochida, Yusuki Itoh, Yusuki Itoh, Takao Suzuki, Takao Suzuki, "Thermal stability in magneto-optical recording media: analysis of magnetization decay", Proc. SPIE 4085, Fifth International Symposium on Optical Storage (ISOS 2000), (7 February 2001); doi: 10.1117/12.416811; https://doi.org/10.1117/12.416811
PROCEEDINGS
4 PAGES


SHARE
Back to Top