Effects of grain boundaries on magnetic properties of recording media

R. H. Victora; S. D. Willoughby; J. M. MacLaren; Jianhua Xue

doi:10.1109/TMAG.2003.808998

Effects of grain boundaries on magnetic properties of recording media

R. H. Victora, S. D. Willoughby, J. M. MacLaren, Jianhua Xue

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Grain boundaries play a crucial role in determining the macroscopic properties of magnetic recording media. The authors employ electronic structure theory, based on the local spin density approximation, to calculate the exchange energy, anisotropy energy, and magnetization at two types of grain boundaries. They incorporate these values into a micromagnetic simulation, thus correlating hysteresis loops and switching properties to atomic features. The authors show that small intergranular spacings (less than 0.2 nm) effectively break exchange, while a larger Cr thickness is required to achieve the same effect.

Original language	English (US)
Pages (from-to)	710-715
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	39
Issue number	2 I
DOIs	https://doi.org/10.1109/TMAG.2003.808998
State	Published - Mar 2003

Bibliographical note

Funding Information:
Manuscript received June 28, 2002. This work was supported in part by the National Storage Industry Consortium, NSF/DMR-9971573 and NSF/LEQSF(2001-04)-RII-03.

Keywords

Electronic structure
Grain boundaries
Intergranular exchange
Micromagnetic simulation

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10.1109/TMAG.2003.808998

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abstract = "Grain boundaries play a crucial role in determining the macroscopic properties of magnetic recording media. The authors employ electronic structure theory, based on the local spin density approximation, to calculate the exchange energy, anisotropy energy, and magnetization at two types of grain boundaries. They incorporate these values into a micromagnetic simulation, thus correlating hysteresis loops and switching properties to atomic features. The authors show that small intergranular spacings (less than 0.2 nm) effectively break exchange, while a larger Cr thickness is required to achieve the same effect.",

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AU - Victora, R. H.

AU - Willoughby, S. D.

AU - MacLaren, J. M.

AU - Xue, Jianhua

N1 - Funding Information: Manuscript received June 28, 2002. This work was supported in part by the National Storage Industry Consortium, NSF/DMR-9971573 and NSF/LEQSF(2001-04)-RII-03.

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Y1 - 2003/3

N2 - Grain boundaries play a crucial role in determining the macroscopic properties of magnetic recording media. The authors employ electronic structure theory, based on the local spin density approximation, to calculate the exchange energy, anisotropy energy, and magnetization at two types of grain boundaries. They incorporate these values into a micromagnetic simulation, thus correlating hysteresis loops and switching properties to atomic features. The authors show that small intergranular spacings (less than 0.2 nm) effectively break exchange, while a larger Cr thickness is required to achieve the same effect.

AB - Grain boundaries play a crucial role in determining the macroscopic properties of magnetic recording media. The authors employ electronic structure theory, based on the local spin density approximation, to calculate the exchange energy, anisotropy energy, and magnetization at two types of grain boundaries. They incorporate these values into a micromagnetic simulation, thus correlating hysteresis loops and switching properties to atomic features. The authors show that small intergranular spacings (less than 0.2 nm) effectively break exchange, while a larger Cr thickness is required to achieve the same effect.

KW - Electronic structure

KW - Grain boundaries

KW - Intergranular exchange

KW - Micromagnetic simulation

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ER -

Effects of grain boundaries on magnetic properties of recording media

Abstract

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