Chin. Phys. Lett.  2010, Vol. 27 Issue (6): 068503    DOI: 10.1088/0256-307X/27/6/068503
CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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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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.

Keywords: 85.70.Kh      75.60.Jk      44.90.+c     
Received: 17 December 2009      Published: 25 May 2010
PACS:  85.70.Kh (Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.); domain-motion devices, etc.)  
  75.60.Jk (Magnetization reversal mechanisms)  
  44.90.+c (Other topics in heat transfer)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/27/6/068503       OR      https://cpl.iphy.ac.cn/Y2010/V27/I6/068503
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Articles by authors
LIAO Jia-Lin
WEI Shen-Jin
LI Jing
JIN Qing-Yuan
CHE Xiao-Dong
[1] McDaniel T W 2005 J. Phys.: Condens. Matter 17 315
[2] McDaniel T W, Challener W A and Sendur K 2003 IEEE Trans. Magn . 39 4
[3] Heinonen O and Gao K Z 2008 J. Magn. Magn. Mater. 320 2885
[4] Bai D Z, Luo P, Torabi A, Terrill D, Wang J, Stoey K, Liu F, Moneck M, Tang Y H and Zhu J G 2007 IEEE Trans. Magn . 43 2
[5] Hu S and Xu B X 2006 Rev. Sci. Instrum. 77 034703
[6] Bertram N 1994 Theory of Magnetic Recording (Cambridge: Cambridge University)
[7] Bai D Z, Torabi A F, Mallary M L and Zhu J G 2004 IEEE Trans. Magn . 40 4
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