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

Authors

Nissim Amos, University of California, Riverside
John Butler, University of California, Riverside
Beomseop Lee, University of California, Riverside
Meir H. Shachar, University of California, Riverside
Bing Hu, University of California, Riverside
Yuan Tian, University of California, Riverside
Jeongmin Hong, Department of Electrical and Computer Engineering, Florida International UniversityFollow
Davil Garcia, University of California, Riverside
Rabee M. Ikkawi, University of California, Riverside
Robert C. Haddon, University of California, Riverside
Dmitri Litvinov, University of California, Riverside
Sakhrat Khizroev, Department of Electrical and Computer Engineering, Florida International University; University of California, RiversideFollow

Date of this Version

7-10-2012

Document Type

Article

Abstract

This letter presents an experimental study that shows that a 3^rd 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.

Comments

Originally published in PLoS One.

Creative Commons License

This work is licensed under a Creative Commons Attribution 3.0 License.

Recommended Citation

Amos, Nissim; Butler, John; Lee, Beomseop; Shachar, Meir H.; Hu, Bing; Tian, Yuan; Hong, Jeongmin; Garcia, Davil; Ikkawi, Rabee M.; Haddon, Robert C.; Litvinov, Dmitri; and Khizroev, Sakhrat, "Multilevel-3D Bit Patterned Magnetic Media with 8 Signal Levels Per Nanocolumn" (2012). Electrical and Computer Engineering Faculty Publications. 43.
https://digitalcommons.fiu.edu/ece_fac/43