Structural, magnetic and electromagnetic wave absorption properties of SrFe12O19/ZnO nanocomposites

Poorbafrani, A.; Kameli, P.; Salamati, H.

doi:10.1007/s10853-012-6727-1

Cited by 23 publications

(6 citation statements)

References 33 publications

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“…The stretching vibrations of metal–oxygen bonds (with ν 1 and ν 2 modes) are the reason for these peaks. The bands near 420–480 cm −1 (ν 1 mode) and 550–590 cm −1 (ν 2 mode) can be attributed to the vibration of ferric crystallographic site (octahedral or tetrahedral coordination) [30]. …”

Section: Resultsmentioning

confidence: 99%

Radiation losses in the microwave K_u band in magneto-electric nanocomposites

Kaur¹,

Godara²,

Sharma³

et al. 2015

Beilstein J. Nanotechnol.

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SummaryA study on radiation losses in conducting polymer nanocomposites, namely La–Co-substituted barium hexaferrite and polyaniline, is presented. The study was performed by means of a vector network analyser, X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, electron spin resonance spectroscopy and a vibrating sample magnetometer. It is found that the maximum loss occurs at 17.9 GHz (−23.10 dB, 99% loss) which is due to the composition of a conducting polymer and a suitable magnetic material. A significant role of polyaniline has been observed in ESR. The influence of the magnetic properties on the radiation losses is explained. Further studies revealed that the prepared material is a nanocomposite. FTIR spectra show the presence of expected chemical structures such as C–H bonds in a ring system at 1512 cm−1.

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Section: Resultsmentioning

confidence: 99%

Radiation losses in the microwave K_u band in magneto-electric nanocomposites

Kaur¹,

Godara²,

Sharma³

et al. 2015

Beilstein J. Nanotechnol.

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“…An oxidation-reduction reaction between the citric acid and metal nitrates is the one responsible for decomposition. Between 600 and 700 • C, there is weight loss due to decomposition of precursor and conversion from hematite to hexaferrite structure [17]. After 700 • C, weight loss becomes constant which indicates the formation of SrNdC.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Effect of Heat Treatment on Properties of Sr0.7Nd0.3Co0.3Fe11.7O19

Kumar

Kaur

Godara

et al. 2015

J Supercond Nov Magn

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In this work, strontium hexaferrite powder with composition Sr 0.7 Nd 0.3 Co 0.3 Fe 11.7 O 19 (SrNdC) was synthesized via a sol-gel method and sintered at 500, 700, 900, and 1100 • C. The properties like phase analysis, crystallite size, surface area, lattice constant, and strain were evaluated using X-ray diffraction (XRD). The presence of two prominent peaks at 432 and 586 cm −1 in Fourier transform infrared (FT-IR) spectra indicates the formation of hexaferrite. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show the cluster formation and hexagonal structure of synthesized hexaferrite. Thermogravimetric analysis (TGA) reveals the variation of mass of precursor with temperature and temperature of formation of SrNdC. M-H curves obtained from a vibrating sample magnetometer (VSM) show that the magnetic properties like coercivity, saturation, and retentivity are significantly affected by sintering temperature.

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“…The WO 3 concentration up to 30 wt% enhances the microwaves absorption properties (−26.32 dB at frequency 6.6 GHz) and shifts the absorption maximum curve to higher frequency. capability due to their large magneto-crystalline anisotropy [20]. Among ferrites based nanocomposites, CuFe 2 O 4 nanocomposites with nonmagnetic oxides and polymers have also gathered a lot of attraction due to their interesting electric and magnetic properties [21,22].…”

Section: Introductionmentioning

confidence: 99%