Multiple Layer Microwave-Assisted Magnetic Recording
@article{Greaves2017MultipleLM, title={Multiple Layer Microwave-Assisted Magnetic Recording}, author={Simon John Greaves and Yasushi Kanai and Hiroaki Muraoka}, journal={IEEE Transactions on Magnetics}, year={2017}, volume={53}, pages={1-10} }
Simulations of recording on media with two and three distinct recording layers are presented. A high frequency field is used to select the layer on which data are recorded. Layer-selective recording was confirmed for two layer granular media with narrow distributions. For three layer media magnetostatic interactions between the layers led to a loss of selectivity in the bottom recording layer. Readout of data is possible by staggering transitions in different layers or by using a spin-torque…
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References
SHOWING 1-10 OF 16 REFERENCES
Microwave-assisted three-dimensional multilayer magnetic recording
- Physics
- 2009
Layer-selective writing of two layer bit patterned media is demonstrated by performing micromagnetic finite element simulations. Selectivity is achieved by controlling the frequency of an oscillating…
Microwave-Assisted Magnetic Recording on Dual-Thickness and Dual-Layer Bit-Patterned Media
- Materials ScienceIEEE Transactions on Magnetics
- 2016
This paper describes how microwave-assisted magnetic recording can be used to reduce adjacent track erasure and increase areal density in dual-thickness and dual-layer bit-patterned media. By tuning…
Microwave Assisted Magnetic Recording
- PhysicsIEEE Transactions on Magnetics
- 2008
In this paper, we present a novel mechanism for recording at a head held significantly below the medium coercivity in a perpendicular recording geometry. By applying a localized ac field at adequate…
Narrow Track Confinement by AC Field Generation Layer in Microwave Assisted Magnetic Recording
- PhysicsIEEE Transactions on Magnetics
- 2008
Microwave assisted magnetic recording (MAMR) has been proposed to provide sufficient writability in magnetic recording when the magnetic grain has a large crystalline anisotropy field in high…
Layer-Selective Switching of a Double-Layer Perpendicular Magnetic Nanodot Using Microwave Assistance
- Education
- 2016
City planners know how to stretch real estate: build upward. The same idea may be used to densify memory or other components on a chip. The authors demonstrate layer-selective microwave-assisted…
Multilayer exchange spring media for magnetic recording
- Geology
- 2006
The concept of exchange spring media is extended from two layers to N layers. The coercive field of the multilayer structure decreases with 1∕N while the energy barrier is only determined by the…
Microwave-assisted magnetization reversal and multilevel recording in composite media
- Physics
- 2009
Microwave-assisted magnetic reversal (MAMR) is studied for media comprising exchange-coupled composite elements comprising soft and hard layers. Reversal in such elements occurs under substantially…
Readout method from antiferromagnetically coupled perpendicular magnetic recording media using ferromagnetic resonance
- Physics
- 2013
We fabricate perpendicular magnetic recording media comprising two antiferromagnetically coupled Co/Pt multilayers and investigate its magnetic properties by ferromagnetic resonance (FMR)…
Magnetic dot arrays with multiple storage layers
- Physics
- 2005
An approach to increasing the data storage density of magnetic recording was investigated wherein dot arrays are combined with multiple magnetic storage layers. The latter consists of two…