High-temperature magnetic properties of mechanically alloyed SmCo5 and YCo5 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 SmCo₅ and YCo₅ magnets

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

Physics and Astronomy

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

37 Scopus citations

Abstract

The high-temperature coercivity of mechanically alloyed and subsequently annealed RCo₅ (R = Sm and Y) is studied. The annealed materials have the hexagonal CaCu₅ 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 YCo₅ is much smaller than that of SmCo₅. This behavior is explained in terms of the intrinsic temperature variation of the magnetocrystalline anisotropy.

Original language	English (US)
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
State	Published - Jul 2001
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 SmCo5 and YCo5 magnets",

abstract = "The high-temperature coercivity of mechanically alloyed and subsequently annealed RCo5 (R = Sm and Y) is studied. The annealed materials have the hexagonal CaCu5 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 YCo5 is much smaller than that of SmCo5. 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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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 RCo5 (R = Sm and Y) is studied. The annealed materials have the hexagonal CaCu5 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 YCo5 is much smaller than that of SmCo5. 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 RCo5 (R = Sm and Y) is studied. The annealed materials have the hexagonal CaCu5 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 YCo5 is much smaller than that of SmCo5. 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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