High Frequency Recording With Shielded Planar Type Heads

FEM-boundary integral method micromagnetic software was used to analyze the recording field response of an indented magnetic head to high frequency recording currents (1–4 GHz). Next, micromagnetic simulations of heat-assisted magnetic recording were performed and the signal-to-noise ratio (SNR) calculated at high frequencies. With a soft magnetic underlayer, the head field was large enough and gave higher SNRs. The large head field strength at low frequency did not cause any deterioration of the SNR.

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Optimisation of applied field pulses for microwave assisted magnetic recording

Greaves

Muraoka

Kanai

2017

AIP Advances

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Grains in a recording medium experience field pulses from a write head during recording. In general, a short head field rise time and a square pulse shape have been viewed as optimal. This work investigates the optimum field pulse shape for microwave assisted magnetic recording on single layer and ECC media. A square pulse was found to give the best recording performance on single layer media, but an initially negative field pulse increasing at a constant rate was more suitable for ECC media.

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High Frequency Recording With Shielded Planar Type Heads

Cited by 6 publications

References 8 publications

Effects of substrate morphology on permeability spectra of Ni80Fe20 films deposited on periodically rippled sapphire substrates

Effects of substrate morphology on permeability spectra of Ni80Fe20 films deposited on periodically rippled sapphire substrates

Micromagnetic model analysis of high frequency heat-assisted magnetic recording

Optimisation of applied field pulses for microwave assisted magnetic recording

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