The origin of enhanced L10 chemical ordering in Ag-doped FePt nanoparticles

Yun Mo Sung; Myung Ki Lee; Ki Eun Kim; Tae Geun Kim

doi:10.1016/j.cplett.2007.06.078

The origin of enhanced L1₀ chemical ordering in Ag-doped FePt nanoparticles

Yun Mo Sung, Myung Ki Lee, Ki Eun Kim, Tae Geun Kim

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

18 Citations (Scopus)

Abstract

FePt and Ag-doped FePt nanoparticles were synthesized by the thermolysis and polyol reductions. The A1-to-L1₀ transformation of the nanoparticles was investigated by differential scanning calorimetry (DSC) at different scanning rates, and the DSC endothermic peak shifts were monitored and used for the Kissinger analyses. The activation energy for the phase transformation was determined to be ∼251 and ∼219 kJ/mol for the pure and doped FePt nanoparticles, respectively. The decrease in the activation energy is the evidence of increased number of vacancies, which turned out to be the origin for the reduced L1₀ chemical ordering temperature in doped FePt.

Original language	English
Pages (from-to)	319-322
Number of pages	4
Journal	Chemical Physics Letters
Volume	443
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2007.06.078
Publication status	Published - 2007 Aug 6

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1016/j.cplett.2007.06.078

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title = "The origin of enhanced L10 chemical ordering in Ag-doped FePt nanoparticles",

abstract = "FePt and Ag-doped FePt nanoparticles were synthesized by the thermolysis and polyol reductions. The A1-to-L10 transformation of the nanoparticles was investigated by differential scanning calorimetry (DSC) at different scanning rates, and the DSC endothermic peak shifts were monitored and used for the Kissinger analyses. The activation energy for the phase transformation was determined to be ∼251 and ∼219 kJ/mol for the pure and doped FePt nanoparticles, respectively. The decrease in the activation energy is the evidence of increased number of vacancies, which turned out to be the origin for the reduced L10 chemical ordering temperature in doped FePt.",

author = "Sung, {Yun Mo} and Lee, {Myung Ki} and Kim, {Ki Eun} and Kim, {Tae Geun}",

note = "Funding Information: This work was supported by the Korea Research Foundation (KRF) Grant by the Korean Government (MOEHRD) (KRF-2006-311-D00568).",

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T1 - The origin of enhanced L10 chemical ordering in Ag-doped FePt nanoparticles

AU - Sung, Yun Mo

AU - Lee, Myung Ki

AU - Kim, Ki Eun

AU - Kim, Tae Geun

N1 - Funding Information: This work was supported by the Korea Research Foundation (KRF) Grant by the Korean Government (MOEHRD) (KRF-2006-311-D00568).

PY - 2007/8/6

Y1 - 2007/8/6

N2 - FePt and Ag-doped FePt nanoparticles were synthesized by the thermolysis and polyol reductions. The A1-to-L10 transformation of the nanoparticles was investigated by differential scanning calorimetry (DSC) at different scanning rates, and the DSC endothermic peak shifts were monitored and used for the Kissinger analyses. The activation energy for the phase transformation was determined to be ∼251 and ∼219 kJ/mol for the pure and doped FePt nanoparticles, respectively. The decrease in the activation energy is the evidence of increased number of vacancies, which turned out to be the origin for the reduced L10 chemical ordering temperature in doped FePt.

AB - FePt and Ag-doped FePt nanoparticles were synthesized by the thermolysis and polyol reductions. The A1-to-L10 transformation of the nanoparticles was investigated by differential scanning calorimetry (DSC) at different scanning rates, and the DSC endothermic peak shifts were monitored and used for the Kissinger analyses. The activation energy for the phase transformation was determined to be ∼251 and ∼219 kJ/mol for the pure and doped FePt nanoparticles, respectively. The decrease in the activation energy is the evidence of increased number of vacancies, which turned out to be the origin for the reduced L10 chemical ordering temperature in doped FePt.

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JO - Chemical Physics Letters

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The origin of enhanced L1₀ chemical ordering in Ag-doped FePt nanoparticles

Abstract

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