Near field optical transducer design with FePt recording media for multiple Tb/in2 density heat assisted magnetic recording

B. X. Xu; Y. T. Toh; C. W. Chia; J. F. Hu; G. G. Vienne; C. W. An; Y. Yosia; T. C. Chong

doi:10.1117/12.859097

3 June 2010 Near field optical transducer design with FePt recording media for multiple Tb/in² density heat assisted magnetic recording

B. X. Xu, Y. T. Toh, C. W. Chia, J. F. Hu, G. G. Vienne, C. W. An, Y. Yosia, T. C. Chong

Author Affiliations +

Proceedings Volume 7730, Optical Data Storage 2010; 77300N (2010) https://doi.org/10.1117/12.859097
Event: Optical Data Storage 2010, 2010, Boulder, Colorado, United States

Abstract

In heat assisted magnetic recording, near field optical transducer is a key component for its success. Due to the near field properties, the transducer design has to be done combining with media. FePt is a potential recording material for heat assisted recording. In this paper, the measured optical constant of FePt thin film was introduced, and the design and simulation of c-aperture transducer with FePt media for multiple Tb/in² heat assisted magnetic recording application were performed. The light spot sizes of around 15nm with high efficiency were obtained. Optical transducer is used to heat the media locally. Its final target is to generate smaller thermal profile to meet the requirement of recording density. Therefore, using obtained beam spot as heat source, thermal simulations were carried out with media material's thermal parameters. The simulation results show that recording density of 3Tb/in² is possible.

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B. X. Xu, Y. T. Toh, C. W. Chia, J. F. Hu, G. G. Vienne, C. W. An, Y. Yosia, and T. C. Chong "Near field optical transducer design with FePt recording media for multiple Tb/in² density heat assisted magnetic recording", Proc. SPIE 7730, Optical Data Storage 2010, 77300N (3 June 2010); https://doi.org/10.1117/12.859097

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