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 …

Design and numerical study of flux control effect dominant MAMR head: FC writer

N Narita, M Takagishi, H Iwasaki, H Suto… - IEEE Transactions …, 2020 - ieeexplore.ieee.org
Flux control effect (FC effect) is one of the field modification effects in microwave-assisted
magnetic recording heads by locating the spin torque oscillator in the write gap (WG). In this …

Micromagnetic Simulation of L10-FePt-Based Exchange-Coupled-Composite-Bit-Patterned Media with Microwave-Assisted Magnetic Recording at Ultrahigh Areal …

P Khunkitti, N Wannawong, C Jongjaihan… - Micromachines, 2021 - mdpi.com
In this work, we propose exchange-coupled-composite-bit-patterned media (ECC-BPM) with
microwave-assisted magnetic recording (MAMR) to improve the writability of the magnetic …

Micromagnetic simulation of microwave-assisted magnetization switching and signal recording characteristics for exchange-coupled composite media with layer …

T Tanaka, K Kurihara, X Ya, X Bai, Y Kanai - Journal of Magnetism and …, 2023 - Elsevier
Microwave-assisted magnetic recording (MAMR) is a promising candidate for ultra-high-
density recording devices. In this study, microwave-assisted magnetization switching (MAS) …

Magnetization dynamics of a flux control device fabricated in the write gap of a hard-disk-drive write head for high-density recording

H Suto, M Takagishi, N Narita, H Iwasaki… - Journal of Applied …, 2021 - pubs.aip.org
The design concept of microwave-assisted magnetic recording (MAMR) using the flux
control (FC) effect has been proposed as a technology for hard disk drives (HDDs). In this …

Optimization of soft layer uniaxial anisotropy gradient in media for microwave-assisted magnetic recording

SJ Greaves, R Itagaki, Y Kanai - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Exchange-coupled composite (ECC), notched, and graded anisotropy recording media were
optimized for microwave-assisted magnetic recording at head-medium spacings from 4.5 to …

Effects of Ti doping on the magnetic and microstructure properties of the lower magnetic anisotropy CoCrPtRu-oxides layer in a perpendicular recording media

JL Tsai, TC Chang, LX Liu, YC Chen, HT Tsai - Thin Solid Films, 2024 - Elsevier
Areal density capacity is constrained by linear and track density, and the recent
advancements in magnetic layer structures have led to the development of segmented …

Systematic evaluation of microwave-assisted magnetic recording

Z Liu, PW Huang, S Hernandez, G Ju… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
A micro-magnetic simulation model to evaluate microwave-assisted magnetic recording
(MAMR) has been developed. Optimization of the spin torque oscillator with ac field strength …

MAMR writability and signal-recording characteristics on granular exchange-coupled composite media

T Tanaka, K Kurihara, X Ya, Y Kanai, X Bai… - Journal of Magnetism …, 2021 - Elsevier
Exchange-coupled composite (ECC) media present a possible layered structure for
microwave-assisted magnetic recording (MAMR) systems. In this paper, MAMR writability …

[HTML][HTML] Segmented media and medium damping in microwave assisted magnetic recording

X Bai, JG Zhu - AIP Advances, 2018 - pubs.aip.org
In this paper, we present a methodology of segmented media stack design for microwave
assisted magnetic recording. Through micro-magnetic modeling, it is demonstrated that an …