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Gilbert damping and critical real-space trajectory of L1(0)-ordered FePt films investigated by magnetic-field-induction and all-optical methods

Title
Gilbert damping and critical real-space trajectory of L1(0)-ordered FePt films investigated by magnetic-field-induction and all-optical methods
Authors
Lee, KD[Lee, Kyeong-Dong]Song, HS[Song, Hyon-Seok]Kim, JW[Kim, Ji-Wan]Ko, HS[Ko, Hyun Seok]Sohn, JW[Sohn, Jeong-Woo]Park, BG[Park, Byong-Guk]Shin, SC[Shin, Sung-Chul]
DGIST Authors
Song, HS[Song, Hyon-Seok]; Sohn, JW[Sohn, Jeong-Woo]; Shin, SC[Shin, Sung-Chul]
Issue Date
2014-11
Citation
Applied Physics Express, 7(11)
Type
Article
Article Type
Article
Keywords
AnisotropyDampingDamping ConstantsEffective AnisotropyGilbert DampingLandau-Lifshitz-GilbertLaser InducedMagnetization DynamicsOptical MethodsReal-Space TrajectoriesSpace FlightTrajectories
ISSN
1882-0778
Abstract
The magnetization dynamics of perpendicularly magnetized FePt films is studied using both magnetic-field-induction and all-optical methods. A critically damped trajectory was observed in this system, where the precession ended within subnanoseconds after a single large oscillation. Using the Landau-Lifshitz-Gilbert (LLG) calculation with an experimental configuration, the effective anisotropy and damping constant were obtained. A damping constant of approximately 0.2 was determined after both a magnetic field and a laser pulse were used. The laser-induced real-space trajectory was well explained by the modified LLG calculation taking into account the demagnetization and time-dependent anisotropy. © 2014 The Japan Society of Applied Physics
URI
http://hdl.handle.net/20.500.11750/3006
DOI
10.7567/APEX.7.113004
Publisher
Institute of Physics Publishing
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceETC1. Journal Articles
Emerging Materials ScienceETC1. Journal Articles


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