Dependence of Predicted Areal Density on Common Optimization Strategies for Heat-Assisted Magnetic Recording

2017 ◽  
Vol 8 ◽  
pp. 1-4 ◽  
Author(s):  
Yipeng Jiao ◽  
R. H. Victora
Keyword(s):  
Magnetic Recording ◽  
Areal Density ◽  
Heat Assisted Magnetic Recording

Transient Thermal Response of the Media by Free Space Laser Heating in Heat Assisted Magnetic Recording

2016 ◽  
Author(s):  
Shaomin Xiong ◽  
Robert Smith ◽  
Na Wang ◽  
Dongbo Li ◽  
Erhard Schreck ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Heat Conduction Problem ◽  
Temperature Response ◽  
Thermal Response ◽  
Areal Density ◽  
Heat Assisted Magnetic Recording ◽  
Lumped Model ◽  
The Media ◽  
Transient Thermal ◽  
Transient Thermal Response

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.

Areal-Density Limits for Heat-Assisted Magnetic Recording and Perpendicular Magnetic Recording

2016 ◽  
Vol 52 (7) ◽  
pp. 1-4 ◽  
Author(s):  
Chris Rea ◽  
Pradeep Subedi ◽  
Kaizhong Gao ◽  
Hua Zhou ◽  
Pu-Ling Lu ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Areal Density ◽  
Heat Assisted Magnetic Recording ◽  
Perpendicular Magnetic Recording

Effect of FePt on resonant behaviour of a near field transducer for high areal density heat assisted magnetic recording

2014 ◽  
Vol 104 (11) ◽  
pp. 111107 ◽  
Author(s):  
Sajid Hussain ◽  
Charanjit S. Bhatia ◽  
Hyunsoo Yang ◽  
Aaron J. Danner
Keyword(s):  
Magnetic Recording ◽  
Near Field ◽  
Areal Density ◽  
Heat Assisted Magnetic Recording

Thermal Stability of Lubricants for Application in Heat-Assisted Magnetic Recording

2013 ◽  
Author(s):  
Bala Krishna Pathem ◽  
Xing-Cai Guo ◽  
Yoko Saito ◽  
Robert Waltman ◽  
John Burns ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Recording ◽  
Experimental Studies ◽  
Thermal Exposure ◽  
Areal Density ◽  
Head Disk Interface ◽  
Heat Assisted Magnetic Recording ◽  
Disk Interface ◽  
Film Evaporation ◽  
Thermal Stability Of

In order to meet the demand to increase the areal density of magnetic recording, promising technologies such as heat-assisted magnetic recording (HAMR) are being extensively pursued [1–3]. However, the high transient disk temperature (400–500 °C, nanosecond time scale) required by this recording scheme might dramatically affect the reliability of the head-disk interface. Possible issues include overcoat oxidation and graphitization, both on head and disk, as well as lubricant evaporation, thermodiffusion, and decomposition. Although modeling and experimental studies have been published describing the lubricant film evaporation under thermal exposure, very few studies have been directed toward understanding the mechanisms of lubricant decomposition [4–7].

scholarly journals Impact of radius and skew angle on areal density in heat assisted magnetic recording hard disk drives

AIP Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 056507
Author(s):  
Michael Cordle ◽  
Chris Rea ◽  
Jason Jury ◽  
Tim Rausch ◽  
Cal Hardie ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Areal Density ◽  
Disk Drives ◽  
Skew Angle ◽  
Heat Assisted Magnetic Recording
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