Explorations on size limit of L10-FePt nanoparticles for practical magnetic storage

With the advance of HAMR technology, the storage potential of L10-FePt nanoparticles with practical considerations are of great significance. We present an L10-FePt nanoparticle model based on atomistic spin model with Langevin thermodynamics to simulate the magnetic behaviors of L10-FePt nanopartic...

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Bibliographic Details
Published inAIP advances Vol. 6; no. 11; pp. 115302 - 115302-6
Main Authors Huang, Tao, Wang, Haiwei, Zou, Yuhao, Cheng, Weiming, Xie, Changsheng
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.11.2016
AIP Publishing LLC
Subjects
Aspect ratio
Computer simulation
Curie temperature
Design margins
Intermetallic compounds
Iron compounds
Magnetic storage
Nanoparticles
Platinum compounds
Temperature
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Summary:With the advance of HAMR technology, the storage potential of L10-FePt nanoparticles with practical considerations are of great significance. We present an L10-FePt nanoparticle model based on atomistic spin model with Langevin thermodynamics to simulate the magnetic behaviors of L10-FePt nanoparticles at Curie temperature and room temperature to explore their practical design margins. Given specific composites, the Curie temperatures of L10-FePt nanoparticles decrease with their volume sizes decrease starting from 8 nm, meaning no more laser power increment needed for smaller L10-FePt nanoparticles. However, L10-FePt nanoparticles get unstable more easily while their volume sizes decrease at room temperature within 10 years. Above all, a reasonable size of L10-FePt nanoparticles for stable information retaining should not be less than 8 nm at a certain aspect ratio.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4967243