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 journalArticle

16 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 languageEnglish
Pages (from-to)319-322
Number of pages4
JournalChemical Physics Letters
Volume443
Issue number4-6
DOIs
Publication statusPublished - 2007 Aug 6

Fingerprint

Nanoparticles
nanoparticles
scanning
Differential scanning calorimetry
heat measurement
Activation energy
activation energy
Thermolysis
Vacancies
phase transformations
Phase transitions
Scanning
shift
Temperature
temperature
polyol

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces
  • Condensed Matter Physics

Cite this

The origin of enhanced L10 chemical ordering in Ag-doped FePt nanoparticles. / Sung, Yun Mo; Lee, Myung Ki; Kim, Ki Eun; Kim, Tae Geun.

In: Chemical Physics Letters, Vol. 443, No. 4-6, 06.08.2007, p. 319-322.

Research output: Contribution to journalArticle

@article{e007709dc4ea48ef8f2b09c8b4c93baa,
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}",
year = "2007",
month = "8",
day = "6",
doi = "10.1016/j.cplett.2007.06.078",
language = "English",
volume = "443",
pages = "319--322",
journal = "Chemical Physics Letters",
issn = "0009-2614",
publisher = "Elsevier",
number = "4-6",

}

TY - JOUR

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

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.

UR - http://www.scopus.com/inward/record.url?scp=34447641636&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34447641636&partnerID=8YFLogxK

U2 - 10.1016/j.cplett.2007.06.078

DO - 10.1016/j.cplett.2007.06.078

M3 - Article

AN - SCOPUS:34447641636

VL - 443

SP - 319

EP - 322

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

IS - 4-6

ER -