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

Research output: Contribution to journal › Conference article › peer-review

35 Citations (SciVal)

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
Externally published	Yes
Event	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: Jan 7 2001 → Jan 11 2001

Keywords

Anisotropy
Coercivity
Finite-temperature magnetism
Permanent magnets

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/20.951226

Cite this

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title = "High-temperature magnetic properties of mechanically alloyed SmCo 5 and YCo 5 magnets",

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.",

keywords = "Anisotropy, Coercivity, Finite-temperature magnetism, Permanent magnets",

author = "Al-Omari, {I. A.} and R. Skomski and Thomas, {R. A.} and D. Leslie-Pelecky and Sellmyer, {D. J.}",

note = "Funding Information: Manuscript received October 12, 2000. This work was supported by ARO/DARPA and CMRA. A. Al-Omari is with the Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE 68588. He is on leave from the Department of Applied Physical Sciences, Jordan University of Science and Technology, Irbid-Jordan. R. Skomski, R. A. Thomas, D. Leslie-Pelecky, and D. J. Sellmyer are with the Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE 68588. Publisher Item Identifier S 0018-9464(01)06878-9.; 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) ; Conference date: 07-01-2001 Through 11-01-2001",

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doi = "10.1109/20.951226",

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AU - Al-Omari, I. A.

AU - Skomski, R.

AU - Thomas, R. A.

AU - Leslie-Pelecky, D.

AU - Sellmyer, D. J.

N1 - Funding Information: Manuscript received October 12, 2000. This work was supported by ARO/DARPA and CMRA. A. Al-Omari is with the Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE 68588. He is on leave from the Department of Applied Physical Sciences, Jordan University of Science and Technology, Irbid-Jordan. R. Skomski, R. A. Thomas, D. Leslie-Pelecky, and D. J. Sellmyer are with the Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE 68588. Publisher Item Identifier S 0018-9464(01)06878-9.

PY - 2001/7

Y1 - 2001/7

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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