Role of Dipolar Interactions on the Thermal Stability of High-Density Bit-Patterned Media

被引：25

作者：

Eibagi, Nasim ^{[1
,2
]}

Kan, Jimmy J. ^{[1
,3
]}

Spada, Frederick E. ^{[1
]}

Fullerton, Eric E. ^{[1
,2
,3
]}

机构：

[1] Univ Calif San Diego, Ctr Magnet Recording Res, San Diego, CA 92093 USA

[2] Univ Calif San Diego, Elect & Comp Engn Dept, San Diego, CA 92093 USA

[3] Univ Calif San Diego, Mat Sci & Engn Dept, San Diego, CA 92093 USA

来源：

IEEE MAGNETICS LETTERS | 2012年 / 3卷

关键词：

Information storage; bit-patterned media; composite structures; dipolar interactions; energy barrier;

D O I：

10.1109/LMAG.2012.2211864

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：

We have characterized the magnetic reversal and thermal stability of bit-patterned media with a composite structure of [Co (0.25 nm)/Pd (0.7 nm)](5)/Fe(X)/[Pd (0.7 nm)/Co (0.25 nm)](5), where X = 1, 1.5, and 2 nm. For 25 nm diameter islands separated by 35 nm, the average thermal stability of the islands is confirmed by analyzing the time-dependent coercive fields. However, by further analyzing the time-dependent hysteresis loop shape, we find a broad distribution of the effective energy barriers. We quantitatively show that this energy barrier distribution arises primarily from the dipolar interactions in these densely packed arrays and not from intrinsic distributions.

引用

页数：4

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