Magnetic phase transition of annealed FePt based nanoparticles synthesized by using Fe(β-diketonate)3

Tangwatanakul, Witoon; Chokprasombat, Komkrich; Sirisathitkul, Chitnarong; Jantaratana, Pongsakorn; Sirisathitkul, Yaowarat

doi:10.1016/j.jallcom.2015.09.045

Cited by 5 publications

(3 citation statements)

References 37 publications

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“…In addition to required magnetic properties, excessive agglomerations have to be inhibited. It was demonstrated in [8] that hysteresis loops were substantially different when nanoparticles were synthesized with four different precursors. The coercive field was at the lowest in the case of Fe(hfac) 3 which can be traced back to its magnetic properties in the as-synthesized form.…”

Section: Fept 3 Nanosuspension Synthesized From Different Precursors mentioning

confidence: 99%

“…Moreover, the homogenous assembly by attractive van der Waals force and magnetic dipole interaction in monodisperse ferromagnetic nanoparticles is required in the data storage [6,7]. The chemical synthesis normally results in the mixed phase of FePt 3 with iron oxides and the annealing treatment is needed to convert the as-synthesized phase into ferromagnetic FePt [8]. Nevertheless, the as-synthesized FePt-based nanoparticles also find applications based on their superparamagnetic properties.…”

Section: Introductionmentioning

confidence: 99%

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FePt3 nanosuspension synthesized from different precursors – a morphological comparison by SAXS, DLS and TEM

Sarmphim¹,

Soontaranon²,

Sirisathitkul³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Annealed iron-platinum (FePt) is ferromagnetic in a nanoscale regime which is necessary for energy and data storage, whereas the as-synthesized form of FePt-based nanoparticles exhibits superparamagnetism useful for biomedical applications. In this study, as-synthesized nanosuspensions from the reaction of Pt(acac) 2 with Fe(acac) 3 and Fe(hfac) 3 are compared. X-ray diffraction (XRD) peaks for both samples are assigned to the FePt 3 phase. As shown by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS), nanoparticles synthesized by using Fe(acac) 3 have a smaller average diameter, but larger polydispersity index and particle agglomerations. On the other hand, the nanoparticles synthesized by using Fe(hfac) 3 can self-assemble into a longer range of patterned monolayer. Dynamic light scattering (DLS), measuring the size of cluster of nanoparticles as well as oleic acid and oleylamine at their surface, confirms that larger agglomerations in the sample were synthesized by using Fe(acac) 3 . In addition to the size distribution, magnetic properties were influenced by the composition of these nanoparticles. Another non-destructive technique to determine the size distribution is small angle X-ray scattering (SAXS) [12]. Its advantages are the accurate determination of nanoparticle size distributions and the discrimination between polydisperse single particle and polydisperse particle in aggregates. SAXS has been successfully used to complement TEM in probing the size distribution of several nanoparticles including Au [13], CoPt 3 [14] and FePt [15]. Furthermore, Fe 3 O 4 and CuO nanoparticles were comparatively characterized using X-ray diffractometry (XRD), TEM, DLS and SAXS [16].In this study, the morphology of FePt-based nanoparticles synthesized from two alternative precursors is compared by using TEM, DLS and SAXS. Iron(III) acetylacetonate (Fe(acac) 3 ) and iron(III) hexafluoroacetylacetone (Fe(hfac) 3 ) have been investigated as a replacement for highly toxic Fe(CO) 5 . The synthetic procedure, adapted from the published method [17], replaces a N 2 glove box with an Ar Schlenk line. The heating rate in the terminal process and revolution of purified centrifugation are also reduced.

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Section: Fept 3 Nanosuspension Synthesized From Different Precursors mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

FePt3 nanosuspension synthesized from different precursors – a morphological comparison by SAXS, DLS and TEM

Sarmphim¹,

Soontaranon²,

Sirisathitkul³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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show abstract

“…But preparation of multifunctional materials, such as materials with fluorescence and magnetic properties, by simple method is the project of researchers [8,9]. Thermal decomposition of metal acetylacetonates has recently attracted much attention to fabricate thin films and nanoparticles of metals, metal alloys and metal oxides for microelectronic, catalytic and biomedical applications [10][11][12][13]. Colloidal cubic Gd 2 O 3 nanorings and nanoplates were selectively prepared from low-temperature (90 °C) hydrolysis of Gd-(AcAc) 3 and subsequent in situ thermal dehydration of the hydrolyzed precursor-surfactant aggregates at 320 o C [14].…”

Section: Introductionmentioning

confidence: 99%

Composition and Fluorescence of Gadolinium (III) Acetylacetonate Derivatives by Solvothermal Method

Fengzhu¹,

Zhang²,

Chen³

et al. 2017

Int J Opt Photonic Eng

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Gadolinium (III) acetylacetonate was treated by solvothermal method to produce gadolinium complexes with acetylacetonate and -OH groups. The composition, fluorescence, and magnetic properties of the products were studied in detail. The fluorescence showed the products possessed higher energy emission and excitation fluorescence compared to Gadolinium (III) acetylacetonate. Also the product produced at 160 °C possessed higher fluorescent intensity and responding ability toward external magnetic field. So the products were hydrophobic materials with magnetic and fluorescent properties.

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Evolutions of microstructure and magnetic property of wet-chemical synthesized FePt nanoparticles assisted by high magnetic field

Duan

Wang

et al. 2019

Journal of Alloys and Compounds

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Magnetic phase transition of annealed FePt based nanoparticles synthesized by using Fe(β-diketonate)3

Cited by 5 publications

References 37 publications

FePt3 nanosuspension synthesized from different precursors – a morphological comparison by SAXS, DLS and TEM

FePt3 nanosuspension synthesized from different precursors – a morphological comparison by SAXS, DLS and TEM

Composition and Fluorescence of Gadolinium (III) Acetylacetonate Derivatives by Solvothermal Method

Evolutions of microstructure and magnetic property of wet-chemical synthesized FePt nanoparticles assisted by high magnetic field

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