Electromagnetic and Thermomechanical Analysis of Near-Field Heat Transfer in Heat-Assisted Magnetic Recording Heads

2018 ◽  
Vol 54 (8) ◽  
pp. 1-6
Author(s):  
S. Wang ◽  
K. Komvopoulos
Keyword(s):  
Heat Transfer ◽  
Magnetic Recording ◽  
Near Field ◽  
Thermomechanical Analysis ◽  
Heat Assisted Magnetic Recording ◽  
Recording Heads ◽  
Magnetic Recording Heads

Materials for heat-assisted magnetic recording heads

MRS Bulletin ◽  
2018 ◽  
Vol 43 (2) ◽  
pp. 100-105 ◽  
Author(s):  
Michael C. Kautzky ◽  
Martin G. Blaber
Keyword(s):  
Magnetic Recording ◽  
Heat Assisted Magnetic Recording ◽  
Recording Heads ◽  
Magnetic Recording Heads ◽  
Image Position

Abstract

A Numerical Study of the Nanoscale Heat Transfer in the Head-Disk Interface for Heat Assisted Magnetic Recording

2016 ◽  
Author(s):  
Haoyu Wu ◽  
David Bogy
Keyword(s):  
Heat Transfer ◽  
Magnetic Recording ◽  
Transfer Problem ◽  
Numerical Study ◽  
Near Field ◽  
Experimental Result ◽  
Head Disk Interface ◽  
Heat Assisted Magnetic Recording ◽  
Disk Interface ◽  
Nanoscale Heat Transfer

The near field transducer (NFT) overheating problem is an issue the hard disk drive (HDD) industry has faced since heat-assisted magnetic recording (HAMR) technology was first introduced. In this paper, a numerical study of the head disk interface (HDI) is performed to predict the significance of the nanoscale heat transfer due to the back heating from the disk. A steady-state heat transfer problem is first solved to get the disk temperature profile. Then an iterative simulation of the entire HDI system is performed. It shows that the heat transfer coefficient in the HDI increases to about 6:49 × 106 W/(m2K) when the clearance is 0:83 nm. It also shows that in the free space laser scenario, the simulation result is close to the experimental result.

A Numerical Investigation of the Nanoscale Heat Transfer in Heat Assisted Magnetic Recording

2017 ◽  
Author(s):  
Yueqiang Hu ◽  
Haoyu Wu ◽  
Yonggang Meng ◽  
David Bogy
Keyword(s):  
Heat Transfer ◽  
Magnetic Recording ◽  
Near Field ◽  
Field Analysis ◽  
Management Problem ◽  
Heat Management ◽  
Heat Assisted Magnetic Recording ◽  
The Media ◽  
Em Field

The heat management problem in the heat assisted magnetic recording (HAMR) has been a long-term issue. In this paper, we investigated the temperature increase of a “lollipop” type near field transducer (NFT) in HAMR. We included the electromagnetic (EM) field analysis in the modeling and considered the back-heating from the media to the head with various heat transfer mechanisms. The results showed that the overcoat layer of the NFT plays an important role for protecting the NFT from high temperature. Degradation of the overcoat layer may result in the early failure of the NFT.

Imaging magnetic noise sources in magnetic recording heads (Invited Paper)

2005 ◽  
Author(s):  
Lu Yuan ◽  
Jian-Xiang Shen ◽  
Bharat B. Pant ◽  
Sy-Hwang Liou
Keyword(s):  
Magnetic Recording ◽  
Magnetic Noise ◽  
Noise Sources ◽  
Recording Heads ◽  
Magnetic Recording Heads
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