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

## TL;DR

This paper introduces a novel spin-torque oscillator setup capable of reading two adjacent magnetic bits simultaneously, enhancing data transfer rates and noise resilience in hard disk drives through micromagnetic simulations.

## Contribution

The paper presents a new design for a spin-torque oscillator reader that can read two bits at once, with demonstrated simulation results showing clear detection and improved performance.

## Key findings

- Unimodal magnetization response enables dual-bit detection
- Frequency analysis shows stable operation under external fields
- Estimated high signal-to-noise ratios suggest practical viability

## Abstract

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.