High Density Heat-Assisted Magnetic Recording Media and Advanced Characterization-Progress and Challenges

被引：100

作者：

Ju, Ganping ^{[1
]}

Peng, Yingguo ^{[1
]}

Chang, Eric K. C. ^{[1
]}

Ding, Yinfeng ^{[1
]}

Wu, Alexander Q. ^{[1
]}

Zhu, Xiaobin ^{[1
]}

Kubota, Yukiko ^{[1
]}

Klemmer, Timothy J. ^{[1
]}

Amini, Hassib ^{[1
]}

Gao, Li ^{[1
]}

Fan, Zhaohui ^{[1
]}

Rausch, Tim ^{[3
]}

Subedi, Pradeep ^{[2
]}

Ma, Minjie ^{[3
]}

Kalarickal, Sangita ^{[3
]}

Rea, Chris J. ^{[2
]}

Dimitrov, Dimitar V. ^{[2
]}

Huang, Pin-Wei ^{[1
]}

Wang, Kangkang ^{[1
]}

Chen, Xi ^{[1
]}

Peng, Chubing ^{[2
]}

Chen, Weibin ^{[2
]}

Dykes, John W. ^{[3
]}

Seigler, Mike A. ^{[2
]}

Gage, Edward C. ^{[3
]}

Chantrell, Roy ^{[4
]}

Thiele, Jan-Ulrich ^{[1
]}

机构：

[1] Seagate Technol, Fremont, CA 94538 USA

[2] Seagate Technol, Bloomington, MN 55435 USA

[3] Seagate Technol, Shakopee, MN 55379 USA

[4] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2015年 / 51卷 / 11期

关键词：

Basic technology demonstration (BTD) demo; FePtX media; heat-assisted magnetic recording (HAMR); media microstructure; near-field transducer (NFT); T-C distributions; thermal design; ANISOTROPY-FIELD DISTRIBUTION; PERFORMANCE;

D O I：

10.1109/TMAG.2015.2439690

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Heat-assisted magnetic recording (HAMR) is being developed as the next generation magnetic recording technology. Critical components of this technology, such as plasmonic near-field transducer (NFT) and high anisotropy granular FePt media, as well as the performance and reliability of fully integrated drives have been reported. This paper will focus on the progress and challenges of HAMR media, including microstructure and thermal design as well as the testing and characterization at high field and high temperature. Due to the importance of the Curie temperature distribution, sigma T-C, for HAMR, we present a newly developed temperature-dependent complex ac susceptibility method to extract sigma T-C for HAMR media. Such novel magnetic characterization methods have been used in combination with other high field magnetic metrology and spin-stand recording to provide feedback for continuous improvements of HAMR media. Together with NFT and write head design, the thermal design, sigma T-C, and microstructure of the media are key factors to reduce the transition jitter below 2 nm as demonstrated in a previously reported 1 Tb/ in(2) HAMR demonstration. Here, we report the further improvements by significantly enabling higher linear density (> 2500 kfci) HAMR and steady progress in areal density to 1.402 Tb/in(2).

引用

页数：9

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