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Heat assisted magnetic recording is the most promising technology for high density recording. Due to thermal diffusion of the media, its density potential is limited for continuous wave laser heating. Short pulse laser heating can greatly increase the density potential [1-3]. This heating strategy also leads to a low transducer temperature increase [4]. Therefore, short pulse laser heating is a must...
In a heat-assisted magnetic recording (HAMR) system, the optical recording head is one of the essential components, where light delivered from waveguide is focused into an optical spot in the scale of tens of nanometers to heat recording media to lower coercivity temporarily and locally by a near-field optical transducer. High transducer efficiency is desired for HAMR, as large energy lost during...
Heat-assisted magnetic recording is one of the most promising approaches to achieve extremely high density magnetic recording. A laser is used to temporarily heat the recording media film to render its switching field to become lower than the magnetic field of the writing head. After writing, the film material is cooled down to room temperature for data storage. In this dynamic writing process, the...
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