In multi-layered solids, an acoustic wave is partially reflected and partially transmitted at boundaries, which renders a too complex wave pattern to be predicted with analytical models. A Finite Element Method (FEM) based numerical model is developed to predict the acoustic wave propagation in multi-layered solids, where an ANSYS acoustic fluid element is adopted to solve this problem. The model is applied to study the pump-probe transient reflectivity measurements on Heat Assisted Magnetic Recording (HAMR) media, where the thermo-elastic waves are isolated and then subtracted from the composite reflectivity change measurement. As a result, the reflectivity change caused by the thermal decay is separated from the thermo-elastic waves, allowing a more accurate prediction and measurement of the thermal properties of HAMR media.
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World Tribology Congress III
September 12–16, 2005
Washington, D.C., USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4201-0
PROCEEDINGS PAPER
Modeling of Acoustic Wave Propagation HAMR Media
Yiao-Tee Hsia,
Yiao-Tee Hsia
Seagate Technology, Pittsburgh, PA
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Julius Hohlfeld
Julius Hohlfeld
Seagate Technology, Pittsburgh, PA
Search for other works by this author on:
Wei Peng
Seagate Technology, Pittsburgh, PA
Yiao-Tee Hsia
Seagate Technology, Pittsburgh, PA
Julius Hohlfeld
Seagate Technology, Pittsburgh, PA
Paper No:
WTC2005-63913, pp. 757-758; 2 pages
Published Online:
November 17, 2008
Citation
Peng, W, Hsia, Y, & Hohlfeld, J. "Modeling of Acoustic Wave Propagation HAMR Media." Proceedings of the World Tribology Congress III. World Tribology Congress III, Volume 1. Washington, D.C., USA. September 12–16, 2005. pp. 757-758. ASME. https://doi.org/10.1115/WTC2005-63913
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