TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Singh, Charanjeet
AU  - Bogdanović, Milica
PY  - 2024
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3166
AB  - Complex impedance spectra at room temperature in the frequency range of 8 Hz—5 MHz were measured on freshly cut leaf sections of the Aloe vera plant by AC impedance spectroscopy. They were analyzed using a classical 'brickwork' equivalent circuit composed of grain and grain boundary contributions commonly applied to solid-state materials. The obtained grain resistance/capacitance was 0.4 MΩ/72 pF and grain boundary resistance/ capacitance was 66.4 MΩ/50 nF. The determined conductivity changed according to the Jonscher power law with σDC of 4.02 · 10–5 (Ωm)−1 and frequency constant of 0.92 characteristic for hopping as the conduction mechanism. Analysis of dielectric permittivity and electric modulus confirmed the non-Debye relaxation behavior. Nyquist plots for electric modulus revealed conductivity relaxation in the low frequency attributed to grain boundaries and impedance modulus displayed dielectric relaxation in the high frequency region associated with grains. A correlation has been established among the investigated parameters, morphology, and EIS-derived simulated parameters.
PB  - IOP publishing
T2  - Materials Research Express
T1  - Exploration of the charge transport mechanism, complex impedance, dielectric/electric modulus and energy storage characteristics of the aloe vera (Aloe Barbadensis Miller) plant
SP  - 016302
VL  - 11
DO  - 10.1088/2053-1591/ad1b03
ER  - 

@article{
author = "Nikolić, Maria Vesna and Singh, Charanjeet and Bogdanović, Milica",
year = "2024",
abstract = "Complex impedance spectra at room temperature in the frequency range of 8 Hz—5 MHz were measured on freshly cut leaf sections of the Aloe vera plant by AC impedance spectroscopy. They were analyzed using a classical 'brickwork' equivalent circuit composed of grain and grain boundary contributions commonly applied to solid-state materials. The obtained grain resistance/capacitance was 0.4 MΩ/72 pF and grain boundary resistance/ capacitance was 66.4 MΩ/50 nF. The determined conductivity changed according to the Jonscher power law with σDC of 4.02 · 10–5 (Ωm)−1 and frequency constant of 0.92 characteristic for hopping as the conduction mechanism. Analysis of dielectric permittivity and electric modulus confirmed the non-Debye relaxation behavior. Nyquist plots for electric modulus revealed conductivity relaxation in the low frequency attributed to grain boundaries and impedance modulus displayed dielectric relaxation in the high frequency region associated with grains. A correlation has been established among the investigated parameters, morphology, and EIS-derived simulated parameters.",
publisher = "IOP publishing",
journal = "Materials Research Express",
title = "Exploration of the charge transport mechanism, complex impedance, dielectric/electric modulus and energy storage characteristics of the aloe vera (Aloe Barbadensis Miller) plant",
pages = "016302",
volume = "11",
doi = "10.1088/2053-1591/ad1b03"
}

Nikolić, M. V., Singh, C.,& Bogdanović, M.. (2024). Exploration of the charge transport mechanism, complex impedance, dielectric/electric modulus and energy storage characteristics of the aloe vera (Aloe Barbadensis Miller) plant. in Materials Research Express
IOP publishing., 11, 016302.
https://doi.org/10.1088/2053-1591/ad1b03

Nikolić MV, Singh C, Bogdanović M. Exploration of the charge transport mechanism, complex impedance, dielectric/electric modulus and energy storage characteristics of the aloe vera (Aloe Barbadensis Miller) plant. in Materials Research Express. 2024;11:016302.
doi:10.1088/2053-1591/ad1b03 .

Nikolić, Maria Vesna, Singh, Charanjeet, Bogdanović, Milica, "Exploration of the charge transport mechanism, complex impedance, dielectric/electric modulus and energy storage characteristics of the aloe vera (Aloe Barbadensis Miller) plant" in Materials Research Express, 11 (2024):016302,
https://doi.org/10.1088/2053-1591/ad1b03 . .

TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Ammar, Souad
AU  - Ilić, Nikola
AU  - Singh, Charanjeet
AU  - Dojčinović, Milena
AU  - Jotania, Rajshree
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2128
AB  - SrCo0.2Zn0.2Fe11.6O18.8 hexaferrite was obtained by a “one-pot” green sol-gel synthesis
method utilizing aqueous mandarin orange (Citrus reticulata) peel extract as an eco-friendly reactant.
The research objective was to analyze the influence of cobalt and zinc co-doping and the synthesis
process on the structure, morphology, magnetic, dielectric and ferroelectric properties of strontium
hexaferrite in view of future applications. Structural and morphological characterization using
X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron
microscopy coupled to energy dispersive X-ray spectrometry (SEM-EDX) confirmed the formation
of a Co and Zn ion incorporated M-type magnetoplumbite with c/a lattice parameter ratio of 3.919
as crystallite nanoplatelets of 32 and 53 nm in thickness and width, respectively. The magnetic
hysteresis loop of the synthesized powder recorded by a vibrating sample magnetometer (VSM) at
room temperature confirmed its ferromagnetic nature with a coercive field (Hc) of 2539 Oe and a
saturation magnetization (Ms) and remanent magnetization (Mr) of 44.6 emu/g and 21.4 emu/g,
respectively. Room temperature ferroelectric loops measured at 100 Hz showed a maximal (Pmax)
and a remanent (Pr) polarization of 195.4 and 31.0 nC/cm2, respectively. Both increased when the
magnitude of the applied electrical field increased in the 1–24 kV/cm range. The dielectric constant
decreased with the frequency increase, in accordance with the Maxwell–Wagner model, while the
conductivity changed according to the Jonscher power law. The complex impedance was modeled
with an equivalent circuit, enabling identification of the dominant contribution of grain boundary
resistance (272.3 MW) and capacitance (7.16 pF).
PB  - MDPI
T2  - Crystals
T1  - Ferroelectric, Magnetic and Dielectric Properties of SrCo0.2Zn0.2Fe11.6O18.8 Hexaferrite Obtained by “One-Pot” Green Sol-Gel Synthesis Utilizing Citrus reticulata Peel Extract
IS  - 1452
VL  - 13
DO  - 10.3390/cryst13101452
ER  - 

@article{
author = "Nikolić, Maria Vesna and Ammar, Souad and Ilić, Nikola and Singh, Charanjeet and Dojčinović, Milena and Jotania, Rajshree",
year = "2023",
abstract = "SrCo0.2Zn0.2Fe11.6O18.8 hexaferrite was obtained by a “one-pot” green sol-gel synthesis
method utilizing aqueous mandarin orange (Citrus reticulata) peel extract as an eco-friendly reactant.
The research objective was to analyze the influence of cobalt and zinc co-doping and the synthesis
process on the structure, morphology, magnetic, dielectric and ferroelectric properties of strontium
hexaferrite in view of future applications. Structural and morphological characterization using
X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron
microscopy coupled to energy dispersive X-ray spectrometry (SEM-EDX) confirmed the formation
of a Co and Zn ion incorporated M-type magnetoplumbite with c/a lattice parameter ratio of 3.919
as crystallite nanoplatelets of 32 and 53 nm in thickness and width, respectively. The magnetic
hysteresis loop of the synthesized powder recorded by a vibrating sample magnetometer (VSM) at
room temperature confirmed its ferromagnetic nature with a coercive field (Hc) of 2539 Oe and a
saturation magnetization (Ms) and remanent magnetization (Mr) of 44.6 emu/g and 21.4 emu/g,
respectively. Room temperature ferroelectric loops measured at 100 Hz showed a maximal (Pmax)
and a remanent (Pr) polarization of 195.4 and 31.0 nC/cm2, respectively. Both increased when the
magnitude of the applied electrical field increased in the 1–24 kV/cm range. The dielectric constant
decreased with the frequency increase, in accordance with the Maxwell–Wagner model, while the
conductivity changed according to the Jonscher power law. The complex impedance was modeled
with an equivalent circuit, enabling identification of the dominant contribution of grain boundary
resistance (272.3 MW) and capacitance (7.16 pF).",
publisher = "MDPI",
journal = "Crystals",
title = "Ferroelectric, Magnetic and Dielectric Properties of SrCo0.2Zn0.2Fe11.6O18.8 Hexaferrite Obtained by “One-Pot” Green Sol-Gel Synthesis Utilizing Citrus reticulata Peel Extract",
number = "1452",
volume = "13",
doi = "10.3390/cryst13101452"
}

Nikolić, M. V., Ammar, S., Ilić, N., Singh, C., Dojčinović, M.,& Jotania, R.. (2023). Ferroelectric, Magnetic and Dielectric Properties of SrCo0.2Zn0.2Fe11.6O18.8 Hexaferrite Obtained by “One-Pot” Green Sol-Gel Synthesis Utilizing Citrus reticulata Peel Extract. in Crystals
MDPI., 13(1452).
https://doi.org/10.3390/cryst13101452

Nikolić MV, Ammar S, Ilić N, Singh C, Dojčinović M, Jotania R. Ferroelectric, Magnetic and Dielectric Properties of SrCo0.2Zn0.2Fe11.6O18.8 Hexaferrite Obtained by “One-Pot” Green Sol-Gel Synthesis Utilizing Citrus reticulata Peel Extract. in Crystals. 2023;13(1452).
doi:10.3390/cryst13101452 .

Nikolić, Maria Vesna, Ammar, Souad, Ilić, Nikola, Singh, Charanjeet, Dojčinović, Milena, Jotania, Rajshree, "Ferroelectric, Magnetic and Dielectric Properties of SrCo0.2Zn0.2Fe11.6O18.8 Hexaferrite Obtained by “One-Pot” Green Sol-Gel Synthesis Utilizing Citrus reticulata Peel Extract" in Crystals, 13, no. 1452 (2023),
https://doi.org/10.3390/cryst13101452 . .

TY  - JOUR
AU  - Singh, Charanjeet
AU  - Nikolić, Maria Vesna
AU  - Narang, Sukhleen Bindra
AU  - Sombra, A. S. B.
AU  - Zhou, Di
AU  - Trukhanov, Sergei
AU  - Panina, Larrisa
AU  - Singh, Jasbir
AU  - Trukhanov, Alex
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1378
AB  - The microwave characteristics of composites prepared from Ba0.5Sr0.5CoxTixFe(12-2x)O19/paraffin wax with 10% and 20% volume fraction of ferrite powder in wax have been examined in the test frequency range of 0.13-4 GHz. The purpose was to determine an optimum composition that could be used in the design of microwave devices for low loss wireless communication. The effect of volume fraction, doping, and thickness on dielectric, magnetic, conductivity, and reflection loss characteristics was explored to ascertain microwave low loss/unattenuated transmission. The results reveal that the dielectric and magnetic properties can be tuned by Co(2+)and Ti(4+)ion doping and the percentage volume fraction ratio of the ferrite in the ferrite/wax composite. The height of reflection loss dips increased with thickness and they narrowed for higher doping with Co(2+)and Ti(4+)ions. All compositions render 98.8% unattenuated transmission of the microwave signal encompassing the majority of the investigated frequency regime. Compositionx = 0.6 has the maximum reflection loss of - 0.35 x 10(-3) dB at 0.15 GHz. The obtained results for these compositions could be considered for designing microwave devices for low loss wireless communication with 0.05 dB bandwidth of 3 GHz in the explored microwave range.
PB  - Springer Heidelberg, Heidelberg
T2  - Applied Physics A-Materials Science & Processing
T1  - Complex permittivity and complex permeability characteristics of Co-Ti doped barium strontium hexaferrite/paraffin wax composites for application in microwave devices
IS  - 11
VL  - 126
DO  - 10.1007/s00339-020-04016-0
ER  - 

@article{
author = "Singh, Charanjeet and Nikolić, Maria Vesna and Narang, Sukhleen Bindra and Sombra, A. S. B. and Zhou, Di and Trukhanov, Sergei and Panina, Larrisa and Singh, Jasbir and Trukhanov, Alex",
year = "2020",
abstract = "The microwave characteristics of composites prepared from Ba0.5Sr0.5CoxTixFe(12-2x)O19/paraffin wax with 10% and 20% volume fraction of ferrite powder in wax have been examined in the test frequency range of 0.13-4 GHz. The purpose was to determine an optimum composition that could be used in the design of microwave devices for low loss wireless communication. The effect of volume fraction, doping, and thickness on dielectric, magnetic, conductivity, and reflection loss characteristics was explored to ascertain microwave low loss/unattenuated transmission. The results reveal that the dielectric and magnetic properties can be tuned by Co(2+)and Ti(4+)ion doping and the percentage volume fraction ratio of the ferrite in the ferrite/wax composite. The height of reflection loss dips increased with thickness and they narrowed for higher doping with Co(2+)and Ti(4+)ions. All compositions render 98.8% unattenuated transmission of the microwave signal encompassing the majority of the investigated frequency regime. Compositionx = 0.6 has the maximum reflection loss of - 0.35 x 10(-3) dB at 0.15 GHz. The obtained results for these compositions could be considered for designing microwave devices for low loss wireless communication with 0.05 dB bandwidth of 3 GHz in the explored microwave range.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Applied Physics A-Materials Science & Processing",
title = "Complex permittivity and complex permeability characteristics of Co-Ti doped barium strontium hexaferrite/paraffin wax composites for application in microwave devices",
number = "11",
volume = "126",
doi = "10.1007/s00339-020-04016-0"
}

Singh, C., Nikolić, M. V., Narang, S. B., Sombra, A. S. B., Zhou, D., Trukhanov, S., Panina, L., Singh, J.,& Trukhanov, A.. (2020). Complex permittivity and complex permeability characteristics of Co-Ti doped barium strontium hexaferrite/paraffin wax composites for application in microwave devices. in Applied Physics A-Materials Science & Processing
Springer Heidelberg, Heidelberg., 126(11).
https://doi.org/10.1007/s00339-020-04016-0

Singh C, Nikolić MV, Narang SB, Sombra ASB, Zhou D, Trukhanov S, Panina L, Singh J, Trukhanov A. Complex permittivity and complex permeability characteristics of Co-Ti doped barium strontium hexaferrite/paraffin wax composites for application in microwave devices. in Applied Physics A-Materials Science & Processing. 2020;126(11).
doi:10.1007/s00339-020-04016-0 .

Singh, Charanjeet, Nikolić, Maria Vesna, Narang, Sukhleen Bindra, Sombra, A. S. B., Zhou, Di, Trukhanov, Sergei, Panina, Larrisa, Singh, Jasbir, Trukhanov, Alex, "Complex permittivity and complex permeability characteristics of Co-Ti doped barium strontium hexaferrite/paraffin wax composites for application in microwave devices" in Applied Physics A-Materials Science & Processing, 126, no. 11 (2020),
https://doi.org/10.1007/s00339-020-04016-0 . .