Ferromagnetic CoPt3 nanowires: Structural evolution from fcc to ordered L12

Ming Chen Hao; Fen Hsin Chia; Yuan Chen Po; Ru Shi Liu; Shu Fen Hu; Chao Yuan Huang; Jyh Fu Lee; Ling Yun Jang

doi:10.1021/ja906103p

Ferromagnetic CoPt₃ nanowires: Structural evolution from fcc to ordered L1₂

Ming Chen Hao, Fen Hsin Chia, Yuan Chen Po, Ru Shi Liu^*, Shu Fen Hu, Chao Yuan Huang, Jyh Fu Lee, Ling Yun Jang

^*Corresponding author for this work

Department of Physics

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

40 Citations (Scopus)

Abstract

This investigation demonstrates the magnetic properties and nanostructures of CoPt₃ wire arrays that were fabricated by electrodeposition using a porous alumina template. The X-ray absorption analysis clearly verified the occurrence of a phase transition in CoPt₃ nanowires. This phase transition significantly influences the magnetic properties and enhances coercivity and squareness. The phase transition of CoPt₃ nanowires was from a random alloy distribution to anisotropically ordered CoPt₃ (L1₂). The thermally induced phase transition of CoPt₃ nanowires to ordered L1₂ CoPt₃ through a "cluster-in-cluster" intermediate state via interdiffusion processes is revealed. The mechanism exhibited by these CoPt₃ nanowires is proposed to explain the strong correlation between their magnetic character and their atomic distribution.

Original language	English
Pages (from-to)	15794-15801
Number of pages	8
Journal	Journal of the American Chemical Society
Volume	131
Issue number	43
DOIs	https://doi.org/10.1021/ja906103p
Publication status	Published - 2009 Nov 4

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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abstract = "This investigation demonstrates the magnetic properties and nanostructures of CoPt3 wire arrays that were fabricated by electrodeposition using a porous alumina template. The X-ray absorption analysis clearly verified the occurrence of a phase transition in CoPt3 nanowires. This phase transition significantly influences the magnetic properties and enhances coercivity and squareness. The phase transition of CoPt3 nanowires was from a random alloy distribution to anisotropically ordered CoPt3 (L12). The thermally induced phase transition of CoPt3 nanowires to ordered L12 CoPt3 through a {"}cluster-in-cluster{"} intermediate state via interdiffusion processes is revealed. The mechanism exhibited by these CoPt3 nanowires is proposed to explain the strong correlation between their magnetic character and their atomic distribution.",

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T2 - Structural evolution from fcc to ordered L12

AU - Hao, Ming Chen

AU - Chia, Fen Hsin

AU - Po, Yuan Chen

AU - Liu, Ru Shi

AU - Hu, Shu Fen

AU - Huang, Chao Yuan

AU - Lee, Jyh Fu

AU - Jang, Ling Yun

PY - 2009/11/4

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N2 - This investigation demonstrates the magnetic properties and nanostructures of CoPt3 wire arrays that were fabricated by electrodeposition using a porous alumina template. The X-ray absorption analysis clearly verified the occurrence of a phase transition in CoPt3 nanowires. This phase transition significantly influences the magnetic properties and enhances coercivity and squareness. The phase transition of CoPt3 nanowires was from a random alloy distribution to anisotropically ordered CoPt3 (L12). The thermally induced phase transition of CoPt3 nanowires to ordered L12 CoPt3 through a "cluster-in-cluster" intermediate state via interdiffusion processes is revealed. The mechanism exhibited by these CoPt3 nanowires is proposed to explain the strong correlation between their magnetic character and their atomic distribution.

AB - This investigation demonstrates the magnetic properties and nanostructures of CoPt3 wire arrays that were fabricated by electrodeposition using a porous alumina template. The X-ray absorption analysis clearly verified the occurrence of a phase transition in CoPt3 nanowires. This phase transition significantly influences the magnetic properties and enhances coercivity and squareness. The phase transition of CoPt3 nanowires was from a random alloy distribution to anisotropically ordered CoPt3 (L12). The thermally induced phase transition of CoPt3 nanowires to ordered L12 CoPt3 through a "cluster-in-cluster" intermediate state via interdiffusion processes is revealed. The mechanism exhibited by these CoPt3 nanowires is proposed to explain the strong correlation between their magnetic character and their atomic distribution.

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Ferromagnetic CoPt₃ nanowires: Structural evolution from fcc to ordered L1₂

Abstract

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