Microwave assisted magnetic recording: Physics and application to hard disk drives

M Takagishi, N Narita, Y Nakagawa… - Journal of Magnetism …, 2022 - Elsevier
Microwave assisted magnetic recording (MAMR) is one of the key candidate technologies
for ten terabits class magnetic recording. In this article, we review MAMR technology and its …

Microwave assisted magnetic recording utilizing perpendicular spin torque oscillator with switchable perpendicular electrodes

JG Zhu, Y Wang - IEEE Transactions on Magnetics, 2010 - ieeexplore.ieee.org
In this paper, we present a systematic micromagnetic modeling study on microwave assisted
magnetic recording (MAMR) utilizing a perpendicular spin torque oscillator (PSTO) to …

Microwave-assisted three-dimensional multilayer magnetic recording

G Winkler, D Suess, J Lee, J Fidler, MA Bashir… - Applied Physics …, 2009 - pubs.aip.org
Layer-selective writing of two layer bit patterned media is demonstrated by performing
micromagnetic finite element simulations. Selectivity is achieved by controlling the frequency …

Nonlinear-dynamical-system approach to microwave-assisted magnetization dynamics

G Bertotti, ID Mayergoyz, C Serpico… - Journal of Applied …, 2009 - pubs.aip.org
Methods of nonlinear-dynamical-system theory are applied to the study of magnetization
dynamics under the action of microwave magnetic fields. In the case of a system with …

Microwave assisted magnetization reversal in composite media

S Li, B Livshitz, HN Bertram, M Schabes… - Applied Physics …, 2009 - pubs.aip.org
Magnetic reversal in exchange-coupled composite elements under microwave fields is
characterized by several unique properties including reduced reversal fields, microwave …

Narrow track confinement by AC field generation layer in microwave assisted magnetic recording

Y Tang, JG Zhu - IEEE Transactions on Magnetics, 2008 - ieeexplore.ieee.org
Microwave assisted magnetic recording (MAMR) has been proposed to provide sufficient
writability in magnetic recording when the magnetic grain has a large crystalline anisotropy …

Media damping constant and performance characteristics in microwave assisted magnetic recording with circular ac field

Y Wang, Y Tang, JG Zhu - Journal of Applied Physics, 2009 - pubs.aip.org
Medium damping constant remains as one of the key concerns for microwave assisted
magnetic recording (MAMR) since switching field reduction seems to be less evident for …

Observation of microwave-assisted magnetization reversal in perpendicular recording media

L Lu, M Wu, M Mallary, G Bertero, K Srinivasan… - Applied Physics …, 2013 - pubs.aip.org
This letter reports microwave-assisted magnetization reversal (MAMR) in a 700-Gbit/in 2
perpendicular media sample. The microwave fields were applied by placing a coplanar …

Microwave-assisted magnetization reversal and multilevel recording in composite media

S Li, B Livshitz, HN Bertram, EE Fullerton… - Journal of Applied …, 2009 - pubs.aip.org
Microwave-assisted magnetic reversal (MAMR) is studied for media comprising exchange-
coupled composite elements comprising soft and hard layers. Reversal in such elements …

Size dependence of magnetization switching and its dispersion of Co/Pt nanodots under the assistance of radio frequency fields

M Furuta, S Okamoto, N Kikuchi, O Kitakami… - Journal of Applied …, 2014 - pubs.aip.org
We have studied the dot size dependence of microwave assisted magnetization switching
(MAS) on perpendicular magnetic Co/Pt multilayer dot array. The significant microwave …