# Transition Jitter in Heat Assisted Magnetic Recording by Micromagnetic Simulation

## TL;DR

This paper uses an extended Landau-Lifschitz equation to simulate heat-assisted magnetic recording, accounting for local geometric features and nonuniform magnetic states, to predict recording performance and transition jitter.

## Contribution

It implements the Bañas model in a finite-element framework to evaluate transition jitter in heat-assisted magnetic recording scenarios.

## Key findings

- Calculated write position shift and transition jitter for various bit lengths.
- Demonstrated capability to predict recording performance with realistic media structures.
- Validated the model against expected recording behavior.

## Abstract

In this paper we apply an extended Landau-Lifschitz equation, as introduced by Ba\v{n}as et al. for the simulation of heat-assisted magnetic recording. This equation has similarities with the Landau-Lifshitz-Bloch equation. The Ba\v{n}as equation is supposed to be used in a continuum setting with sub-grain discretization by the finite-element method. Thus, local geometric features and nonuniform magnetic states during switching are taken into account. We implement the Ba\v{n}as model and test its capability for predicting the recording performance in a realistic recording scenario. By performing recording simulations on 100 media slabs with randomized granular structure and consecutive read back calculation, the write position shift and transition jitter for bit lengths of 10nm, 12nm, and 20nm are calculated.