High-temperature magnetic properties of mechanically alloyed SmCo 5 and YCo 5 magnets

I. A. Al-Omari; R. Skomski; R. A. Thomas; D. Leslie-Pelecky; D. J. Sellmyer

doi:10.1109/20.951226

High-temperature magnetic properties of mechanically alloyed SmCo ₅ and YCo ₅ magnets

I. A. Al-Omari^*, R. Skomski, R. A. Thomas, D. Leslie-Pelecky, D. J. Sellmyer

^*Corresponding author for this work

Physics

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

31 Citations (Scopus)

Abstract

The high-temperature coercivity of mechanically alloyed and subsequently annealed RCo ₅ (R = Sm and Y) is studied. The annealed materials have the hexagonal CaCu ₅ structure with 2:17 (or 1:7) regions as a minor phase, High-temperature magnetic measurements show that the coercivities of materials decrease with increasing temperature from room-temperature to 873 K, but that the temperature coefficient of the coercivity of YCo ₅ is much smaller than that of SmCo ₅. This behavior is explained in terms of the intrinsic temperature variation of the magnetocrystalline anisotropy.

Original language	English
Pages (from-to)	2534-2536
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.951226
Publication status	Published - Jul 2001

Keywords

Anisotropy
Coercivity
Finite-temperature magnetism
Permanent magnets

ASJC Scopus subject areas

Electrical and Electronic Engineering
Physics and Astronomy (miscellaneous)

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abstract = "The high-temperature coercivity of mechanically alloyed and subsequently annealed RCo 5 (R = Sm and Y) is studied. The annealed materials have the hexagonal CaCu 5 structure with 2:17 (or 1:7) regions as a minor phase, High-temperature magnetic measurements show that the coercivities of materials decrease with increasing temperature from room-temperature to 873 K, but that the temperature coefficient of the coercivity of YCo 5 is much smaller than that of SmCo 5. This behavior is explained in terms of the intrinsic temperature variation of the magnetocrystalline anisotropy.",

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AU - Al-Omari, I. A.

AU - Skomski, R.

AU - Thomas, R. A.

AU - Leslie-Pelecky, D.

AU - Sellmyer, D. J.

PY - 2001/7

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N2 - The high-temperature coercivity of mechanically alloyed and subsequently annealed RCo 5 (R = Sm and Y) is studied. The annealed materials have the hexagonal CaCu 5 structure with 2:17 (or 1:7) regions as a minor phase, High-temperature magnetic measurements show that the coercivities of materials decrease with increasing temperature from room-temperature to 873 K, but that the temperature coefficient of the coercivity of YCo 5 is much smaller than that of SmCo 5. This behavior is explained in terms of the intrinsic temperature variation of the magnetocrystalline anisotropy.

AB - The high-temperature coercivity of mechanically alloyed and subsequently annealed RCo 5 (R = Sm and Y) is studied. The annealed materials have the hexagonal CaCu 5 structure with 2:17 (or 1:7) regions as a minor phase, High-temperature magnetic measurements show that the coercivities of materials decrease with increasing temperature from room-temperature to 873 K, but that the temperature coefficient of the coercivity of YCo 5 is much smaller than that of SmCo 5. This behavior is explained in terms of the intrinsic temperature variation of the magnetocrystalline anisotropy.

KW - Anisotropy

KW - Coercivity

KW - Finite-temperature magnetism

KW - Permanent magnets

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