Journal Article10.1109/JPROC.2008.2004315
Heat Assisted Magnetic Recording
Mark H. Kryder,Edward Charles Gage,Terry McDaniel,William Albert Challener,Robert Earl Rottmayer,Ganping Ju,Yiao-Tee Hsia,Mehmet Fatih Erden +7 more
- 02 Dec 2008
- Vol. 96, Iss: 11, pp 1810-1835
1.2K
TL;DR: The challenges for heat-assisted magnetic recording are surveyed and the progress that has been made in addressing them are surveyed.
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Abstract: Heat-assisted magnetic recording is a promising approach for enabling large increases in the storage density of hard disk drives. A laser is used to momentarily heat the recording area of the medium to reduce its coercivity below that of the applied magnetic field from the recording head. In such a system, the recording materials have a very high magnetic anisotropy, which is essential for the thermal stability of the magnetization of the extremely small grains in the medium. This technology involves new recording physics, new approaches to near field optics, a recording head that integrates optics and magnetics, new recording materials, lubricants that can withstand extremely high temperatures, and new approaches to the recording channel design. This paper surveys the challenges for this technology and the progress that has been made in addressing them.
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Citations
Improved Near-Field Transducer Design for Heat-Assisted Magnetic Recording
Anurup Datta,Xianfan Xu +1 more
TL;DR: In this article, the authors investigate a third dimension in the typical planer NFT design by introducing a taper in the model of an E antenna NFT and study its effect on the optical and thermal performances of the NFT.
12
The road to HAMR
William Albert Challener,Chubing Peng,Amit Vasant Itagi,Duane Karns,Yingguo Peng,Xueshi Yang,Xiaobin Zhu,N. J. Gokemeijer,Yiao-Tee Hsia,Ganping Ju,Robert Earl Rottmayer,Michael Allen Seigler,Edward Charles Gage +12 more
- 15 May 2009
TL;DR: An integrated heat assisted magnetic recording (HAMR) head has been demonstrated which can record at a track width of 50 nm and an areal density of ∼240 Gb/in2 on high coercivity FePt media as mentioned in this paper.
12
Understanding field angle for heat assisted magnetic recording via dynamic modeling
Yiming Wang,Jian-Gang Zhu +1 more
TL;DR: In this paper, a combined micromagnetic-thermal-FEM modeling is used to simulate the dynamic recording process of heat assisted magnetic recording (HAMR) for hard disk drives.
11
Scanning thermal probe calibration for accurate measurement of thermal conductivity of ultrathin films
Adam A. Wilson,Adam A. Wilson +1 more
TL;DR: In this article, three published strategies for calibrating probe-sample thermal exchange are directly compared, then used to measure bulk and thin-film thermal conductivity, and it is shown that with an appropriately calibrated probe and film-on-substrate heat conduction model, thermal conductivities of ultrathin-film (2.9-202 nm) Al2O3 on silicon are within 20% deviation of independently measured values, while more commonly used methods yield values that may deviate by more than a factor of two.
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Gradient-Composition Sputtering: An Approach to Fabricate Magnetic Thin Films With Magnetic Anisotropy Increased With Temperature
Nguyen N. Phuoc,C. K. Ong +1 more
TL;DR: In this article, the authors demonstrate that gradient-composition sputtering technique is a method to fabricate magnetic thin films having an in-plane magnetic anisotropy increased with temperature.
11
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