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Title: Renormalized anisotropic exchange for representing heat assisted magnetic recording media

Abstract

Anisotropic exchange has been incorporated in a description of magnetic recording media near the Curie temperature, as would be found during heat assisted magnetic recording. The new parameters were found using a cost function that minimized the difference between atomistic properties and those of renormalized spin blocks. Interestingly, the anisotropic exchange description at 1.5 nm discretization yields very similar switching and magnetization behavior to that found at 1.2 nm (and below) discretization for the previous isotropic exchange. This suggests that the increased accuracy of anisotropic exchange may also reduce the computational cost during simulation.

Authors:
; ;  [1]
  1. MINT Center, Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
Publication Date:
OSTI Identifier:
22410151
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; ANISOTROPY; COMPUTERIZED SIMULATION; CURIE POINT; HEAT; MAGNETIZATION; RENORMALIZATION; SPIN

Citation Formats

Jiao, Yipeng, Liu, Zengyuan, and Victora, R. H., E-mail: victora@umn.edu. Renormalized anisotropic exchange for representing heat assisted magnetic recording media. United States: N. p., 2015. Web. doi:10.1063/1.4916184.
Jiao, Yipeng, Liu, Zengyuan, & Victora, R. H., E-mail: victora@umn.edu. Renormalized anisotropic exchange for representing heat assisted magnetic recording media. United States. doi:10.1063/1.4916184.
Jiao, Yipeng, Liu, Zengyuan, and Victora, R. H., E-mail: victora@umn.edu. Thu . "Renormalized anisotropic exchange for representing heat assisted magnetic recording media". United States. doi:10.1063/1.4916184.
@article{osti_22410151,
title = {Renormalized anisotropic exchange for representing heat assisted magnetic recording media},
author = {Jiao, Yipeng and Liu, Zengyuan and Victora, R. H., E-mail: victora@umn.edu},
abstractNote = {Anisotropic exchange has been incorporated in a description of magnetic recording media near the Curie temperature, as would be found during heat assisted magnetic recording. The new parameters were found using a cost function that minimized the difference between atomistic properties and those of renormalized spin blocks. Interestingly, the anisotropic exchange description at 1.5 nm discretization yields very similar switching and magnetization behavior to that found at 1.2 nm (and below) discretization for the previous isotropic exchange. This suggests that the increased accuracy of anisotropic exchange may also reduce the computational cost during simulation.},
doi = {10.1063/1.4916184},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}