Effects of Cu doping on the microstructure and magnetic properties of CoPt nanowires

Ji Hyun Min; Boo Hyun An; Ji Ung Cho; Hye Min Ji; Su Jung Noh; Young Keun Kim; Hong Ling Liu; Jun Hua Wu; Young Dong Ko; Jin Seok Chung

doi:10.1063/1.2710321

Effects of Cu doping on the microstructure and magnetic properties of CoPt nanowires

Ji Hyun Min, Boo Hyun An, Ji Ung Cho, Hye Min Ji, Su Jung Noh, Young Keun Kim, Hong Ling Liu, Jun Hua Wu, Young Dong Ko, Jin Seok Chung

Department of Materials Science and Engineering

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

14 Citations (Scopus)

Abstract

We studied the effects of copper doping on the microstructure and magnetic properties of CoPt nanowires fabricated in anodized aluminium oxide (AAO) nanotemplates by electrodeposition. The morphological observation indicates well-formed CoPt and CoPtCu nanowires, while the structural analysis shows that fcc- Co3 Pt phase exists prior to annealing and is retained in the doped nanowires, with minor hcp-CoPt phase postannealing. The doping causes shrinkage of the lattice spacing prior to annealing due to the insertion of smaller copper atoms. Compared to the undoped CoPt nanowires, the magnetic measurements reveal significant enhancement in the magnetic properties of the CoPtCu nanowire postannealing, resulting in the more rapid increase in the coercivity with annealing temperature.

Original language	English
Article number	09K513
Journal	Journal of Applied Physics
Volume	101
Issue number	9
DOIs	https://doi.org/10.1063/1.2710321
Publication status	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.2710321

Cite this

@article{354b9bd8f2b141fc85e74e72592927d9,

title = "Effects of Cu doping on the microstructure and magnetic properties of CoPt nanowires",

abstract = "We studied the effects of copper doping on the microstructure and magnetic properties of CoPt nanowires fabricated in anodized aluminium oxide (AAO) nanotemplates by electrodeposition. The morphological observation indicates well-formed CoPt and CoPtCu nanowires, while the structural analysis shows that fcc- Co3 Pt phase exists prior to annealing and is retained in the doped nanowires, with minor hcp-CoPt phase postannealing. The doping causes shrinkage of the lattice spacing prior to annealing due to the insertion of smaller copper atoms. Compared to the undoped CoPt nanowires, the magnetic measurements reveal significant enhancement in the magnetic properties of the CoPtCu nanowire postannealing, resulting in the more rapid increase in the coercivity with annealing temperature.",

author = "Min, {Ji Hyun} and An, {Boo Hyun} and Cho, {Ji Ung} and Ji, {Hye Min} and Noh, {Su Jung} and Kim, {Young Keun} and Liu, {Hong Ling} and Wu, {Jun Hua} and Ko, {Young Dong} and Chung, {Jin Seok}",

note = "Funding Information: This work was supported by the Korea Research Foundation Grant Nos. KRF-2005-210-D00023 and KRF-2004-005-D00057, by Grant No. A050750 of the Korea Health 21 R&D Project, Ministry of Health and Welfare, and by Grant No. M10500000105-05J0000-10510 from the National Research Laboratory Program of the Korea Science and Engineering Foundation. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2007",

doi = "10.1063/1.2710321",

language = "English",

volume = "101",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "9",

}

TY - JOUR

T1 - Effects of Cu doping on the microstructure and magnetic properties of CoPt nanowires

AU - Min, Ji Hyun

AU - An, Boo Hyun

AU - Cho, Ji Ung

AU - Ji, Hye Min

AU - Noh, Su Jung

AU - Kim, Young Keun

AU - Liu, Hong Ling

AU - Wu, Jun Hua

AU - Ko, Young Dong

AU - Chung, Jin Seok

N1 - Funding Information: This work was supported by the Korea Research Foundation Grant Nos. KRF-2005-210-D00023 and KRF-2004-005-D00057, by Grant No. A050750 of the Korea Health 21 R&D Project, Ministry of Health and Welfare, and by Grant No. M10500000105-05J0000-10510 from the National Research Laboratory Program of the Korea Science and Engineering Foundation. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2007

Y1 - 2007

N2 - We studied the effects of copper doping on the microstructure and magnetic properties of CoPt nanowires fabricated in anodized aluminium oxide (AAO) nanotemplates by electrodeposition. The morphological observation indicates well-formed CoPt and CoPtCu nanowires, while the structural analysis shows that fcc- Co3 Pt phase exists prior to annealing and is retained in the doped nanowires, with minor hcp-CoPt phase postannealing. The doping causes shrinkage of the lattice spacing prior to annealing due to the insertion of smaller copper atoms. Compared to the undoped CoPt nanowires, the magnetic measurements reveal significant enhancement in the magnetic properties of the CoPtCu nanowire postannealing, resulting in the more rapid increase in the coercivity with annealing temperature.

AB - We studied the effects of copper doping on the microstructure and magnetic properties of CoPt nanowires fabricated in anodized aluminium oxide (AAO) nanotemplates by electrodeposition. The morphological observation indicates well-formed CoPt and CoPtCu nanowires, while the structural analysis shows that fcc- Co3 Pt phase exists prior to annealing and is retained in the doped nanowires, with minor hcp-CoPt phase postannealing. The doping causes shrinkage of the lattice spacing prior to annealing due to the insertion of smaller copper atoms. Compared to the undoped CoPt nanowires, the magnetic measurements reveal significant enhancement in the magnetic properties of the CoPtCu nanowire postannealing, resulting in the more rapid increase in the coercivity with annealing temperature.

UR - http://www.scopus.com/inward/record.url?scp=34248530185&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34248530185&partnerID=8YFLogxK

U2 - 10.1063/1.2710321

DO - 10.1063/1.2710321

M3 - Article

AN - SCOPUS:34248530185

SN - 0021-8979

VL - 101

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 9

M1 - 09K513

ER -

Effects of Cu doping on the microstructure and magnetic properties of CoPt nanowires

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this