Improvement of structural and magnetic properties of L10-FePd nanocrystals by Co addition

András Kovács; Kazuhisa Sato; Yoshihiko Hirotsu

doi:10.1109/TMAG.2007.893853

Improvement of structural and magnetic properties of L1₀-FePd nanocrystals by Co addition

András Kovács, Kazuhisa Sato, Yoshihiko Hirotsu

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

5 Citations (Scopus)

Abstract

The effect of Co addition to magnetic properties of L1₀-FePd nanoparticles is investigated. Nanocrystalline films with Fd-Co-Fe particles were prepared by electron-beam deposition and subsequent annealing to obtain the ordered L1₀ structure. The L1₀-PdCoFe nanocrystals were formed up to 12 at % of Co concentrations with preferential c axis orientation. At higher Co concentrations, two-phase nanoparticles of L1₀ -PdCoFe and bcc-CoFe were formed. The saturation magnetization is increased with increasing the Co concentration. The saturation magnetization of L1 ₀-Pd₅₁Co₁₂Fe₃₇ nanoparticles is estimated as 1252 emu/cm³ at room temperature. Since it possesses a decrease of L1₀ ordering temperature together with an enhancement of preferential easy axis formation and an increase of saturation magnetization, the Co addition is demonstrated the beneficial impact to L1₀-FePd nanoparticles.

Original language	English
Pages (from-to)	3097-3099
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	43
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2007.893853
Publication status	Published - 2007 Jun

Keywords

Magnetization
Perpendicular magnetic anisotropy
TEM

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/TMAG.2007.893853

Cite this

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title = "Improvement of structural and magnetic properties of L10-FePd nanocrystals by Co addition",

abstract = "The effect of Co addition to magnetic properties of L10-FePd nanoparticles is investigated. Nanocrystalline films with Fd-Co-Fe particles were prepared by electron-beam deposition and subsequent annealing to obtain the ordered L10 structure. The L10-PdCoFe nanocrystals were formed up to 12 at % of Co concentrations with preferential c axis orientation. At higher Co concentrations, two-phase nanoparticles of L10 -PdCoFe and bcc-CoFe were formed. The saturation magnetization is increased with increasing the Co concentration. The saturation magnetization of L1 0-Pd51Co12Fe37 nanoparticles is estimated as 1252 emu/cm3 at room temperature. Since it possesses a decrease of L10 ordering temperature together with an enhancement of preferential easy axis formation and an increase of saturation magnetization, the Co addition is demonstrated the beneficial impact to L10-FePd nanoparticles.",

keywords = "Magnetization, Perpendicular magnetic anisotropy, TEM",

author = "Andr{\'a}s Kov{\'a}cs and Kazuhisa Sato and Yoshihiko Hirotsu",

note = "Funding Information: This work was supported in part by the Japan Society for the Promotion of Science (JSPS) and by the Grant-in-Aid for Scientific Research (S) (No. 16106008) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.",

year = "2007",

month = jun,

doi = "10.1109/TMAG.2007.893853",

language = "English",

volume = "43",

pages = "3097--3099",

journal = "IEEE Transactions on Magnetics",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Improvement of structural and magnetic properties of L10-FePd nanocrystals by Co addition

AU - Kovács, András

AU - Sato, Kazuhisa

AU - Hirotsu, Yoshihiko

N1 - Funding Information: This work was supported in part by the Japan Society for the Promotion of Science (JSPS) and by the Grant-in-Aid for Scientific Research (S) (No. 16106008) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

PY - 2007/6

Y1 - 2007/6

N2 - The effect of Co addition to magnetic properties of L10-FePd nanoparticles is investigated. Nanocrystalline films with Fd-Co-Fe particles were prepared by electron-beam deposition and subsequent annealing to obtain the ordered L10 structure. The L10-PdCoFe nanocrystals were formed up to 12 at % of Co concentrations with preferential c axis orientation. At higher Co concentrations, two-phase nanoparticles of L10 -PdCoFe and bcc-CoFe were formed. The saturation magnetization is increased with increasing the Co concentration. The saturation magnetization of L1 0-Pd51Co12Fe37 nanoparticles is estimated as 1252 emu/cm3 at room temperature. Since it possesses a decrease of L10 ordering temperature together with an enhancement of preferential easy axis formation and an increase of saturation magnetization, the Co addition is demonstrated the beneficial impact to L10-FePd nanoparticles.

AB - The effect of Co addition to magnetic properties of L10-FePd nanoparticles is investigated. Nanocrystalline films with Fd-Co-Fe particles were prepared by electron-beam deposition and subsequent annealing to obtain the ordered L10 structure. The L10-PdCoFe nanocrystals were formed up to 12 at % of Co concentrations with preferential c axis orientation. At higher Co concentrations, two-phase nanoparticles of L10 -PdCoFe and bcc-CoFe were formed. The saturation magnetization is increased with increasing the Co concentration. The saturation magnetization of L1 0-Pd51Co12Fe37 nanoparticles is estimated as 1252 emu/cm3 at room temperature. Since it possesses a decrease of L10 ordering temperature together with an enhancement of preferential easy axis formation and an increase of saturation magnetization, the Co addition is demonstrated the beneficial impact to L10-FePd nanoparticles.

KW - Magnetization

KW - Perpendicular magnetic anisotropy

KW - TEM

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