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Title: Atomistic simulation of sub-nanosecond non-equilibrium field cooling processes for magnetic data storage applications

Thermally assisted magnetic writing is an important technology utilizing temperature dependent magnetic properties to enable orientation of a magnetic data storage medium. Using an atomistic spin model, we study non-equilibrium field cooled magnetization processes on sub-nanosecond timescales required for device applications. We encapsulate the essential physics of the process in a thermoremanent magnetization curve and show that for fast timescales, heating to the Curie temperature is necessary where the magnetic relaxation time is shortest. Furthermore, we demonstrate the requirement for large magnetic fields to achieve a high thermoremanent magnetization necessary for fast recording or data rates.
Authors:
 [1] ;  [1] ;  [2]
  1. Department of Physics, University of York, York YO10 5DD (United Kingdom)
  2. (China)
Publication Date:
OSTI Identifier:
22391955
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COOLING; CURIE POINT; EQUILIBRIUM; HEATING; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETIZATION; ORIENTATION; RELAXATION TIME; SIMULATION; SPIN; TEMPERATURE DEPENDENCE