Microstructure of Cu-added Pr-Fe-B magnets: Crystallization of antiferromagnetic Pr6Fe13Cu in the boundary region

Toshiyuki Kajitani, Katsuhisa Nagayama, Takateru Umeda

研究成果: Article

34 引用 (Scopus)

抄録

The relations between microstructures and magnetic properties have been investigated in Pr17Fe76B5.5Cu1.5 magnets produced by a process of casting, hot-pressing and heat treatment. The crystallization of Pr6Fe13Cu during heat treatment at 753 K for 2 h increases the coercivity. This explains the enhancement of coercivity with the addition of small amounts of Cu. Pr6Fe13Cu has a tetragonal structure, space group 14/mcm, and lattice parameters a = b = 0.81 nm, c = 2.31 nm. Mössbauer spectroscopy and VSM measurements indicate that Pr6Fe13Cu is an antiferromagnetic compound with a Néel temperature of 391 K. Pr6Fe13Cu crystallizes in a peritectic reaction at 918 K, and is stable below that temperature. In Pr-Fe-B-Cu magnets, Pr6Fe13Cu is formed only within a low boron composition range (below 5.5 at%B). In the system Nd-Fe-Cu a compound Nd6Fe13Cu with the same crystal structure is observed.

元の言語English
ページ(範囲)379-386
ページ数8
ジャーナルJournal of Magnetism and Magnetic Materials
117
発行部数3
DOI
出版物ステータスPublished - 1992
外部発表Yes

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Crystallization
Coercive force
coercivity
Magnets
heat treatment
magnets
Heat treatment
crystallization
microstructure
Microstructure
Boron
hot pressing
Hot pressing
Lattice constants
lattice parameters
Magnetic properties
Casting
boron
Crystal structure
Spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

これを引用

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title = "Microstructure of Cu-added Pr-Fe-B magnets: Crystallization of antiferromagnetic Pr6Fe13Cu in the boundary region",
abstract = "The relations between microstructures and magnetic properties have been investigated in Pr17Fe76B5.5Cu1.5 magnets produced by a process of casting, hot-pressing and heat treatment. The crystallization of Pr6Fe13Cu during heat treatment at 753 K for 2 h increases the coercivity. This explains the enhancement of coercivity with the addition of small amounts of Cu. Pr6Fe13Cu has a tetragonal structure, space group 14/mcm, and lattice parameters a = b = 0.81 nm, c = 2.31 nm. M{\"o}ssbauer spectroscopy and VSM measurements indicate that Pr6Fe13Cu is an antiferromagnetic compound with a N{\'e}el temperature of 391 K. Pr6Fe13Cu crystallizes in a peritectic reaction at 918 K, and is stable below that temperature. In Pr-Fe-B-Cu magnets, Pr6Fe13Cu is formed only within a low boron composition range (below 5.5 at{\%}B). In the system Nd-Fe-Cu a compound Nd6Fe13Cu with the same crystal structure is observed.",
author = "Toshiyuki Kajitani and Katsuhisa Nagayama and Takateru Umeda",
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T2 - Crystallization of antiferromagnetic Pr6Fe13Cu in the boundary region

AU - Kajitani, Toshiyuki

AU - Nagayama, Katsuhisa

AU - Umeda, Takateru

PY - 1992

Y1 - 1992

N2 - The relations between microstructures and magnetic properties have been investigated in Pr17Fe76B5.5Cu1.5 magnets produced by a process of casting, hot-pressing and heat treatment. The crystallization of Pr6Fe13Cu during heat treatment at 753 K for 2 h increases the coercivity. This explains the enhancement of coercivity with the addition of small amounts of Cu. Pr6Fe13Cu has a tetragonal structure, space group 14/mcm, and lattice parameters a = b = 0.81 nm, c = 2.31 nm. Mössbauer spectroscopy and VSM measurements indicate that Pr6Fe13Cu is an antiferromagnetic compound with a Néel temperature of 391 K. Pr6Fe13Cu crystallizes in a peritectic reaction at 918 K, and is stable below that temperature. In Pr-Fe-B-Cu magnets, Pr6Fe13Cu is formed only within a low boron composition range (below 5.5 at%B). In the system Nd-Fe-Cu a compound Nd6Fe13Cu with the same crystal structure is observed.

AB - The relations between microstructures and magnetic properties have been investigated in Pr17Fe76B5.5Cu1.5 magnets produced by a process of casting, hot-pressing and heat treatment. The crystallization of Pr6Fe13Cu during heat treatment at 753 K for 2 h increases the coercivity. This explains the enhancement of coercivity with the addition of small amounts of Cu. Pr6Fe13Cu has a tetragonal structure, space group 14/mcm, and lattice parameters a = b = 0.81 nm, c = 2.31 nm. Mössbauer spectroscopy and VSM measurements indicate that Pr6Fe13Cu is an antiferromagnetic compound with a Néel temperature of 391 K. Pr6Fe13Cu crystallizes in a peritectic reaction at 918 K, and is stable below that temperature. In Pr-Fe-B-Cu magnets, Pr6Fe13Cu is formed only within a low boron composition range (below 5.5 at%B). In the system Nd-Fe-Cu a compound Nd6Fe13Cu with the same crystal structure is observed.

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