Detail publikace

Sonochemical Synthesis of Gd3+ doped CoFe2O4 Spinel Ferrite Nanoparticles and Its Physical Properties

YADAV, R. KUŘITKA, I. VILČÁKOVÁ, J. HAVLICA, J. KALINA, L. URBÁNEK, P. MACHOVSKÝ, M. ŠKODA, D. MASAŘ, M. HOLEK, M.

Originální název

Sonochemical Synthesis of Gd3+ doped CoFe2O4 Spinel Ferrite Nanoparticles and Its Physical Properties

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

In this work, a facile and green method for gadolinium doped cobalt ferrite (CoFe2-xGdxO4; x=0.00, 0.05, 0.10, 0.15, 0.20) nanoparticles by using ultrasonic irradiation was reported. The impact of Gd3+ substitution on the structural, magnetic, dielectric and electrical properties of cobalt ferrite nanoparticles was evaluated. The sonochemically synthesized spinel ferrite nanoparticles were characterized by X-ray Diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM). X-ray diffraction (XRD) study confirmed the formation of single phase spinel ferrite of CoFe2-xGdxO4 nanoparticles. XRD results also revealed that ultrasonic irradiation seems to be favourable to achieve highly crystalline single crystal phase gadolinium doped cobalt ferrite nanoparticles without any post annealing process. Fourier Transform Infrared and Raman Spectra confirmed the formation of spinel ferrite crystal structure. X-ray photoelectron spectroscopy revealed the impact of Gd3+ substitution in CoFe2O4 nanoparticles on cation distribution at the tetrahedral and octahedral site in spinel ferrite crystal system. The electrical properties showed that the Gd3+ doped cobalt ferrite (CoFe2-xGdxO4; x= 0.20) exhibit enhanced dielectric constant (277 at 100 Hz) and ac conductivity (20.2 x 10-9 S/cm at 100 Hz). The modulus spectroscopy demonstrated the impact of Gd3+ substitution in cobalt ferrite nanoparticles on grain boundary relaxation time, capacitance and resistance. Magnetic property measurement revealed that the coercivity decreases with Gd3+ substitution from 234.32 Oe (x=0.00) to 12.60 Oe (x=0.05) and further increases from 12.60 Oe (x=0.05) to 68.62 Oe (x=0.20). Moreover, saturation magnetization decreases with Gd3+ substitution from 40.19 emu/g (x=0.00) to 21.58 emu/g (x=0.20). This work demonstrates that the grain size and cation distribution in Gd3+ doped cobalt ferrite nanoparticles synthesized by sonochemical method, is effective in controlling the structural, magnetic, and electrical properties, and can be find very promising applications.

Klíčová slova

Sonochemical Synthesis; Cavitation; Nanoparticles; Magnetic Property; Dielectric Property; Impedance and Modulus Spectroscopy

Autoři

YADAV, R.; KUŘITKA, I.; VILČÁKOVÁ, J.; HAVLICA, J.; KALINA, L.; URBÁNEK, P.; MACHOVSKÝ, M.; ŠKODA, D.; MASAŘ, M.; HOLEK, M.

Vydáno

1. 1. 2018

ISSN

1350-4177

Periodikum

ULTRASONICS SONOCHEMISTRY

Číslo

40

Stát

Spojené království Velké Británie a Severního Irska

Strany od

773

Strany do

783

Strany počet

11

URL

https://www.sciencedirect.com/science/article/pii/S1350417717303784

BibTex

@article{BUT139710,
  author="Raghvendra Singh {Yadav} and Ivo {Kuřitka} and Jarmila {Vilčáková} and Jaromír {Havlica} and Lukáš {Kalina} and Pavel {Urbánek} and Michal {Machovský} and David {Škoda} and Milan {Masař} and Martin {Holek}",
  title="Sonochemical Synthesis of Gd3+ doped CoFe2O4 Spinel Ferrite Nanoparticles and Its Physical Properties",
  journal="ULTRASONICS SONOCHEMISTRY",
  year="2018",
  number="40",
  pages="773--783",
  doi="10.1016/j.ultsonch.2017.08.024",
  issn="1350-4177",
  url="https://www.sciencedirect.com/science/article/pii/S1350417717303784"
}