Enhanced L 10 chemical ordering and FePt Fe3 O4 core/shell structure formation in Zn-doped FePt nanoparticles

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

FePt nanoparticles doped with ∼12 at. % Zn were successfully synthesized using the polyol and thermolysis methods. Their chemical ordering to the face-centered tetragonal (L 10) phase was found to occur at a remarkably reduced temperature of ∼324 °C. The nanoparticles annealed at 400 °C for 60 min were identified to be in a highly crystalline L 10 phase, showing formation of the distinct FePt Fe3 O4 core/shell structure. Also, they demonstrated strong ferromagnetic characteristics due to the high crystallinity with the L 10 phase and the exchange coupling between the FePt core and the Fe3 O4 shell.

Original languageEnglish
Article number173117
JournalApplied Physics Letters
Volume90
Issue number17
DOIs
Publication statusPublished - 2007 May 21

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nanoparticles
crystallinity
temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Enhanced L 10 chemical ordering and FePt Fe3 O4 core/shell structure formation in Zn-doped FePt nanoparticles. / Kim, Ki Eun; Lee, Myung Ki; Sung, Yun Mo; Kim, Tae Geun.

In: Applied Physics Letters, Vol. 90, No. 17, 173117, 21.05.2007.

Research output: Contribution to journalArticle

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AB - FePt nanoparticles doped with ∼12 at. % Zn were successfully synthesized using the polyol and thermolysis methods. Their chemical ordering to the face-centered tetragonal (L 10) phase was found to occur at a remarkably reduced temperature of ∼324 °C. The nanoparticles annealed at 400 °C for 60 min were identified to be in a highly crystalline L 10 phase, showing formation of the distinct FePt Fe3 O4 core/shell structure. Also, they demonstrated strong ferromagnetic characteristics due to the high crystallinity with the L 10 phase and the exchange coupling between the FePt core and the Fe3 O4 shell.

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