Multilevel-3D Bit Patterned Magnetic Media with 8 Signal Levels Per Nanocolumn

被引：24

作者：

Amos, Nissim ^{[1
]}

Butler, John ^{[1
]}

Lee, Beomseop ^{[1
]}

Shachar, Meir H. ^{[1
]}

Hu, Bing ^{[2
]}

Tian, Yuan ^{[1
]}

Hong, Jeongmin ^{[3
]}

Garcia, Davil ^{[4
]}

Ikkawi, Rabee M. ^{[1
]}

Haddon, Robert C. ^{[5
]}

Litvinov, Dmitri ^{[6
]}

Khizroev, Sakhrat ^{[1
,3
]}

机构：

[1] Univ Calif Riverside, Dept Elect Engn, Riverside, CA 92521 USA

[2] Univ Calif Riverside, Dept Comp Sci & Engn, Riverside, CA 92521 USA

[3] Florida Int Univ, Dept Elect Engn, Miami, FL 33199 USA

[4] Univ Calif Riverside, Dept Mat Sci & Engn, Riverside, CA 92521 USA

[5] Univ Calif Riverside, Ctr Nanoscale Sci & Engn, Riverside, CA 92521 USA

[6] Univ Houston, Ctr Nanomagnet Syst, Houston, TX USA

来源：

PLOS ONE | 2012年 / 7卷 / 07期

基金：

美国国家科学基金会;

关键词：

FILMS;

D O I：

10.1371/journal.pone.0040134

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

This letter presents an experimental study that shows that a 3rd physical dimension may be used to further increase information packing density in magnetic storage devices. We demonstrate the feasibility of at least quadrupling the magnetic states of magnetic-based data storage devices by recording and reading information from nanopillars with three magnetically-decoupled layers. Magneto-optical Kerr effect microscopy and magnetic force microscopy analysis show that both continuous (thin film) and patterned triple-stack magnetic media can generate eight magnetically-stable states. This is in comparison to only two states in conventional magnetic recording. Our work further reveals that ferromagnetic interaction between magnetic layers can be reduced by combining Co/Pt and Co/Pd multilayers media. Finally, we are showing for the first time an MFM image of multilevel-3D bit patterned media with 8 discrete signal levels.

引用

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