CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Heat Assisted Magnetic Recording with Matching Media and Recording Head Field |
LIAO Jia-Lin1, WEI Shen-Jin1, LI Jing1, JIN Qing-Yuan1, CHE Xiao-Dong2 |
1Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Laboratory of Advanced Materials and Department of Optical Science and Engineering, Fudan University, Shanghai 200433 2Hitachi Global Storage Technologies, San Jose, CA, USA |
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Cite this article: |
LIAO Jia-Lin, WEI Shen-Jin, LI Jing et al 2010 Chin. Phys. Lett. 27 068503 |
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Abstract The dynamic performance of heat assisted magnetic recording (HAMR) on different media is investigated. Signal and signal-to-noise ratio enhancement are achieved in high coercivity perpendicular media with the aid of laser heating. Linear recording density is increased while saturation write current is lowered. Trailing field partial erasure is observed in lower coercivity media with a ring head, which causes signal reduction with increasing write current or application of a laser. Precautions should be taken against partial erasure in overall recording system optimization of HAMR in order to achieve ultrahigh recording density.
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Keywords:
85.70.Kh
75.60.Jk
44.90.+c
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Received: 17 December 2009
Published: 25 May 2010
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PACS: |
85.70.Kh
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(Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.); domain-motion devices, etc.)
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75.60.Jk
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(Magnetization reversal mechanisms)
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44.90.+c
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(Other topics in heat transfer)
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