Outlook for maintaining areal density growth in magnetic recording

1994 ◽  
Vol 30 (6) ◽  
pp. 3797-3800 ◽  
Author(s):  
E. Grochowski ◽  
D.A. Thompson
2021 ◽  
Vol 1996 (1) ◽  
pp. 012009
Author(s):  
Nuttapon Chaiduangsri ◽  
Somyot Kaitwanidvilai ◽  
Damrongsak Tongsomporn

Abstract This paper discusses the impact of background interference on a recorded pattern for heat-assisted magnetic recording technology (HAMR). Several patterns of the background track were examined, with the log bit error rate and signal to noise ratio measured via a spin-stand tester using HAMR head and media. It was found that the low frequency pattern gave the highest BER and SNR loss due to the strong magnetic field from the adjacent tracks. Similar to its practical use, the PRBS pattern also showed high interference. These observations may be used to support HDD areal density growth.


Author(s):  
Shaomin Xiong ◽  
Robert Smith ◽  
Na Wang ◽  
Dongbo Li ◽  
Erhard Schreck ◽  
...  

Heat assisted magnetic recording (HAMR) promises to deliver higher storage areal density than the current perpendicular magnetic recording (PMR) product. A laser is introduced to the HAMR system to heat the high coercively magnetic media above the Curie temperature (Tc) which is as high as 750 K in order to enable magnetic writing. The thermal response of the media becomes very critical for the success of the data writing process. In this paper, a new method is proposed to understand the transient thermal behavior of the HAMR media. The temperature response of the media is measured based on thermal erasure of the magnetically written signal. A lumped model is built to simplify the heat conduction problem to understand the transient thermal response. Finite element modeling (FEM) is implemented to simulate the transient thermal response of the media due to the laser pulse heating. The experimental and simulation results show fairly good agreement.


2011 ◽  
Vol 47 (10) ◽  
pp. 3312-3315 ◽  
Author(s):  
Xinzhi Xing ◽  
Davide Guarisco ◽  
Guang Yang ◽  
Zhihao Li ◽  
Kroum Stoev ◽  
...  

2016 ◽  
Vol 52 (7) ◽  
pp. 1-4 ◽  
Author(s):  
Chris Rea ◽  
Pradeep Subedi ◽  
Kaizhong Gao ◽  
Hua Zhou ◽  
Pu-Ling Lu ◽  
...  

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