Dark-field scattering spectroscopy to study transducer stability for heat-assisted magnetic recording

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Dark-field scattering spectroscopy to study transducer stability for heat-assisted magnetic recording
Title:
Dark-field scattering spectroscopy to study transducer stability for heat-assisted magnetic recording
Journal Title:
Journal of Applied Physics
Keywords:
Publication Date:
07 April 2015
Citation:
J. Appl. Phys. 117, 17D132 (2015)
Abstract:
Thermal stability of optical near field transducers is an important issue for heat-assisted magnetic recording (HAMR), which affects HAMR system lifetime. In this paper, dark-field scattering spectroscopy was used to study the stability of nanometer-scaled Au lollipop transducers that were subjected to thermal annealing. Variation in relative peak intensity and red-shifting in peak position can be observed in scattering spectra for transducer after annealing. Based on the optical characterizations on Au thin films and calculations of Mie scattering by finite-difference time domain simulations, the measured changes in transducer scattering properties can reflect annealing-induced variations in optical properties and dimensional feature size for the Au lollipop transducer. Dark-field scattering spectroscopy can be a promising method to examine HAMR near field transducer thermal stability.
License type:
PublisherCopyrights
Funding Info:
Description:
Copyright (2015) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 117, 17D132 (2015) and may be found at http://dx.doi.org/10.1063/1.4916997.
ISSN:
0021-8979
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