Heat assisted magnetic recording of bit patterned media beyond 10 Tb/in${}^2$

Abstract

The limits of the areal storage density as can be achieved with heat assisted magnetic recording (HAMR) are still an open issue. We want to address this central question and present the design of a possible bit patterned medium with an areal storage density above 10 Tb/in${}^2$. The model uses hard magnetic recording grains with 5 nm diameter and 10 nm height. It assumes a realistic distribution of the Curie temperature of the underlying material as well as a realistic distribution of the grain size and the grain position. In order to compute the areal density we analyze the detailed switching behavior of a recording bit under different external conditions, which allows to compute the bit error rate of a recording process (shingled and conventional) for different grain spacings and write head positions. Hence, we are able to optimize the areal density of the presented medium.

References in corpus (3)

• Dynamic approach for micromagnetics close to the Curie temperature
• Thermal fluctuations and longitudinal relaxation of single-domain magnetic particles at elevated temperatures
• Landau-Lifshitz-Bloch equation for exchange coupled grains

Cited by in corpus (10)

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• New highly-anisotropic Rh-based Heusler compound for magnetic recording
• Areal density optimizations for heat-assisted-magnetic recording of high density bit-patterned media
• Stochastic ferrimagnetic Landau-Lifshitz-Bloch equation for finite magnetic structures
• AC noise reduction based on exchange coupled grains for heat-assisted-magnetic recording: The effect of an FeRh interlayer
• Transition Jitter in Heat Assisted Magnetic Recording by Micromagnetic Simulation
• Systematic parameterization of heat-assisted magnetic recording switching probabilities and the consequences for the resulting SNR
• Influence of grain size and exchange interaction on the LLB modeling procedure
• Efficiently reducing transition curvature in heat-assisted magnetic recording with state-of-the-art write heads
• Numerical analysis of the Landau--Lifshitz--Bloch equation with spin-torques