Synthesis and characterization of FePt nanoparticles and FePt nanoparticle/SiO2-matrix composite films

Jun Long Zhang; Ji Zhou Kong; Ai Dong Li; You Pin Gong; Hai Rong Guo; Qing Yu Yan; Di Wu

doi:10.1007/s10971-010-2373-8

Synthesis and characterization of FePt nanoparticles and FePt nanoparticle/SiO₂-matrix composite films

Jun Long Zhang, Ji Zhou Kong, Ai Dong Li^*, You Pin Gong, Hai Rong Guo, Qing Yu Yan, Di Wu

^*Corresponding author for this work

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

7 Citations (Scopus)

Abstract

Superparamagnetic face-centered cubic (fcc) FePt nanoparticles were synthesized using a polyol process. The effect of reaction temperature and molar ratio of Fe(CO)₅ to Pt(acac)₂ on the structure, composition and morphology of nanoparticles has been investigated. The optimum processing condition has been obtained for producing well-monodisperse fcc-phase FePt nanoparticles with the 2:1 molar ratio of Fe-Pt at 220 C. In order to circumvent the problem of FePt particle coalescence during high temperature annealing for the L1₀ ordering, FePt nanoparticle/SiO ₂-matrix composite films have been fabricated by sol-gel method. The experimental results confirm that the amorphous SiO₂ matrix effectively inhibits the grain growth and particle aggregation during 700 C annealing for 1 h. Well-monodisperse face-centered tetragonal (fct) FePt particles embedded in the SiO₂ matrix can be obtained with the long-range chemical order parameter S of ~0.74, indicating partially ordered L1₀ phase transition in FePt/SiO₂ composite films. The FePt/SiO₂ system exhibits a hysteretic behavior with smaller coercive field of 1,450 Oe. The incomplete phase transition from cubic deredat height maxsium (A ₁-disordered phase to tetragonal L1₀-ordered phase) might be responsible for it.

Original language	English
Pages (from-to)	269-275
Number of pages	7
Journal	Journal of Sol-Gel Science and Technology
Volume	64
Issue number	2
DOIs	https://doi.org/10.1007/s10971-010-2373-8
Publication status	Published - Nov 2012
Externally published	Yes

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
General Chemistry
Biomaterials
Condensed Matter Physics
Materials Chemistry

Keywords

L1-phase FePt
Monodisperse particle
SiO -matrix
Sol-gel

Access to Document

10.1007/s10971-010-2373-8

Cite this

@article{934029dcd8654c7798df072b5830c83e,

title = "Synthesis and characterization of FePt nanoparticles and FePt nanoparticle/SiO2-matrix composite films",

abstract = "Superparamagnetic face-centered cubic (fcc) FePt nanoparticles were synthesized using a polyol process. The effect of reaction temperature and molar ratio of Fe(CO)5 to Pt(acac)2 on the structure, composition and morphology of nanoparticles has been investigated. The optimum processing condition has been obtained for producing well-monodisperse fcc-phase FePt nanoparticles with the 2:1 molar ratio of Fe-Pt at 220 C. In order to circumvent the problem of FePt particle coalescence during high temperature annealing for the L10 ordering, FePt nanoparticle/SiO 2-matrix composite films have been fabricated by sol-gel method. The experimental results confirm that the amorphous SiO2 matrix effectively inhibits the grain growth and particle aggregation during 700 C annealing for 1 h. Well-monodisperse face-centered tetragonal (fct) FePt particles embedded in the SiO2 matrix can be obtained with the long-range chemical order parameter S of ~0.74, indicating partially ordered L10 phase transition in FePt/SiO2 composite films. The FePt/SiO2 system exhibits a hysteretic behavior with smaller coercive field of 1,450 Oe. The incomplete phase transition from cubic deredat height maxsium (A 1-disordered phase to tetragonal L10-ordered phase) might be responsible for it.",

keywords = "L1-phase FePt, Monodisperse particle, SiO -matrix, Sol-gel",

author = "Zhang, {Jun Long} and Kong, {Ji Zhou} and Li, {Ai Dong} and Gong, {You Pin} and Guo, {Hai Rong} and Yan, {Qing Yu} and Di Wu",

year = "2012",

month = nov,

doi = "10.1007/s10971-010-2373-8",

language = "English",

volume = "64",

pages = "269--275",

journal = "Journal of Sol-Gel Science and Technology",

issn = "0928-0707",

publisher = "Springer Netherlands",

number = "2",

}

TY - JOUR

T1 - Synthesis and characterization of FePt nanoparticles and FePt nanoparticle/SiO2-matrix composite films

AU - Zhang, Jun Long

AU - Kong, Ji Zhou

AU - Li, Ai Dong

AU - Gong, You Pin

AU - Guo, Hai Rong

AU - Yan, Qing Yu

AU - Wu, Di

PY - 2012/11

Y1 - 2012/11

N2 - Superparamagnetic face-centered cubic (fcc) FePt nanoparticles were synthesized using a polyol process. The effect of reaction temperature and molar ratio of Fe(CO)5 to Pt(acac)2 on the structure, composition and morphology of nanoparticles has been investigated. The optimum processing condition has been obtained for producing well-monodisperse fcc-phase FePt nanoparticles with the 2:1 molar ratio of Fe-Pt at 220 C. In order to circumvent the problem of FePt particle coalescence during high temperature annealing for the L10 ordering, FePt nanoparticle/SiO 2-matrix composite films have been fabricated by sol-gel method. The experimental results confirm that the amorphous SiO2 matrix effectively inhibits the grain growth and particle aggregation during 700 C annealing for 1 h. Well-monodisperse face-centered tetragonal (fct) FePt particles embedded in the SiO2 matrix can be obtained with the long-range chemical order parameter S of ~0.74, indicating partially ordered L10 phase transition in FePt/SiO2 composite films. The FePt/SiO2 system exhibits a hysteretic behavior with smaller coercive field of 1,450 Oe. The incomplete phase transition from cubic deredat height maxsium (A 1-disordered phase to tetragonal L10-ordered phase) might be responsible for it.

AB - Superparamagnetic face-centered cubic (fcc) FePt nanoparticles were synthesized using a polyol process. The effect of reaction temperature and molar ratio of Fe(CO)5 to Pt(acac)2 on the structure, composition and morphology of nanoparticles has been investigated. The optimum processing condition has been obtained for producing well-monodisperse fcc-phase FePt nanoparticles with the 2:1 molar ratio of Fe-Pt at 220 C. In order to circumvent the problem of FePt particle coalescence during high temperature annealing for the L10 ordering, FePt nanoparticle/SiO 2-matrix composite films have been fabricated by sol-gel method. The experimental results confirm that the amorphous SiO2 matrix effectively inhibits the grain growth and particle aggregation during 700 C annealing for 1 h. Well-monodisperse face-centered tetragonal (fct) FePt particles embedded in the SiO2 matrix can be obtained with the long-range chemical order parameter S of ~0.74, indicating partially ordered L10 phase transition in FePt/SiO2 composite films. The FePt/SiO2 system exhibits a hysteretic behavior with smaller coercive field of 1,450 Oe. The incomplete phase transition from cubic deredat height maxsium (A 1-disordered phase to tetragonal L10-ordered phase) might be responsible for it.

KW - L1-phase FePt

KW - Monodisperse particle

KW - SiO -matrix

KW - Sol-gel

UR - http://www.scopus.com/inward/record.url?scp=84874056085&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874056085&partnerID=8YFLogxK

U2 - 10.1007/s10971-010-2373-8

DO - 10.1007/s10971-010-2373-8

M3 - Article

AN - SCOPUS:84874056085

SN - 0928-0707

VL - 64

SP - 269

EP - 275

JO - Journal of Sol-Gel Science and Technology

JF - Journal of Sol-Gel Science and Technology

IS - 2

ER -