On the lifetime of plasmonic transducers in heat assisted magnetic recording
For a heat assisted magnetic recording system to be successful, it must deliver heat to a small spot on a magnetic disk without being damaged by the applied power. This paper shows that such conditions may not be easily attained in systems that use laser energy and plasmonic near field transducers....
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Veröffentlicht in: | Journal of applied physics 2012-08, Vol.112 (3) |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | For a heat assisted magnetic recording system to be successful, it must deliver heat to a small spot on a magnetic disk without being damaged by the applied power. This paper shows that such conditions may not be easily attained in systems that use laser energy and plasmonic near field transducers. It is also shown that the analysis and design of the near field transducers cannot rely on numerical integration of the conventional Maxwell equations of electrodynamics of continuous media, because such equations implicitly incorporate numerous assumptions that are not valid in nanoscale systems. Here, we examine assumptions inherent in the derivation of these equations and point out which assumptions are violated if they are applied to the metallic nanoscale elements of heat assisted magnetic recording systems. The main body of the paper focuses on the well-known experimental results that support our conclusions while the derivations are relegated to the appendices. |
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ISSN: | 0021-8979 1089-7550 |
DOI: | 10.1063/1.4745050 |