Simultaneous readout of two adjacent bit tracks with a spin-torque oscillator

We propose a novel setup for a spin-torque oscillator reader in magnetic hard disk drive technology. Two adjacent bit tracks are to be read simultaneously, leading to high data transfer rate and increased resilience to noise as the lateral size of the oscillator device is allowed to remain larger th...

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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 446; pp. 49 - 53
Main Authors Chęciński, Jakub, Frankowski, Marek, Stobiecki, Tomasz
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.01.2018
Elsevier BV
Subjects
Data transfer (computers)
Disk drives
Magnetic noise
Oscillators
Read head
Scaling effects
Signal to noise ratio
Simulation
Spin-torque oscillator
Studies
Torque
Magnetic noise
Scaling effects
Spin-torque oscillator
Read head
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Summary:We propose a novel setup for a spin-torque oscillator reader in magnetic hard disk drive technology. Two adjacent bit tracks are to be read simultaneously, leading to high data transfer rate and increased resilience to noise as the lateral size of the oscillator device is allowed to remain larger than the bit width. We perform micromagnetic simulations of an example system and find that the magnetization response has a clear unimodal character, which enables for detection of two bit values at the same time. We analyze the frequency of the device under the influence of two different external fields and conduct a simulation of a successful dynamic readout. We estimate the signal linewidth and signal-to-noise ratios of the setup and show that it may be potentially beneficial for magnetic readout applications.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2017.09.007