Ferromagnetic CoPt3 Nanowires: Structural Evolution from fcc to Ordered L12 | Zendy

Hao Ming Chen | Zendy; Chia Fen Hsin | Zendy; PoYuan Chen | Zendy; RuShi Liu | Zendy; ShuFen Hu | Zendy; ChaoYuan Huang | Zendy; JyhFu Lee | Zendy; LingYun Jang | Zendy

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Ferromagnetic CoPt₃ Nanowires: Structural Evolution from fcc to Ordered L1₂

Author(s) -

Hao Ming Chen,

Chia Fen Hsin,

PoYuan Chen,

RuShi Liu,

ShuFen Hu,

ChaoYuan Huang,

JyhFu Lee,

LingYun Jang

Publication year - 2009

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja906103p

Subject(s) - chemistry , ferromagnetism , nanowire , crystallography , condensed matter physics , nanotechnology , physics , materials science

This investigation demonstrates the magnetic properties and nanostructures of CoPt(3) 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 CoPt(3) nanowires. This phase transition significantly influences the magnetic properties and enhances coercivity and squareness. The phase transition of CoPt(3) nanowires was from a random alloy distribution to anisotropically ordered CoPt(3) (L1(2)). The thermally induced phase transition of CoPt(3) nanowires to ordered L1(2) CoPt(3) through a "cluster-in-cluster" intermediate state via interdiffusion processes is revealed. The mechanism exhibited by these CoPt(3) nanowires is proposed to explain the strong correlation between their magnetic character and their atomic distribution.

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