Probing the dc electrical resistivity and magnetic properties of mixed metal oxides Cr3+ substituted Mg–Zn ferrites

Komali, Ch.; Murali, N.; Rajkumar, K.; Ramakrishna, A.; Mulushoa, S. Yonatan; Parajuli, D.; Rani, P. N. V. V. L. Pramila; Ampolu, Satheesh; Mouli, K. Chandra; Ramakrishna, Y.

doi:10.1007/s11696-022-02466-9

Cited by 20 publications

(3 citation statements)

References 32 publications

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“…It can be interpreted from the Figure 2 that there exists no signature of secondary phases or impurities, conforming phase pure synthesis of OBLE@Mg−Zn NPs. All the characteristics peaks belonging to face cantered cubic crystallinity of OBLE@Mg−Zn NPs are marked with Miller indices (220), (311), (222), (400), (422), (511), and (440), respectively [22] . XRD profile is fitted very well with phase group

{{\rm F}{\rm d}\bar{3{\rm \ }}{\rm m}}

m showing low goodness of fit parameter (GOF

{\cong }

1.49).…”

Section: Resultsmentioning

confidence: 99%

Magnetically Separable Mg−Zn Ferrite Nanoparticles Synthesized Using Ocimum Basilicum Leaf Extract Potentiates Cytotoxicity: In vitro

Sharma,

Aggarwal,

Kumar

et al. 2023

ChemistrySelect

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The present manuscript portrays environmental benign, cost‐effective and energy efficient green route way to synthesize Mg−Zn ferrite nanoparticles [Mg0.05Zn0.05Fe2O4 NPs] using Ocimum Basilicum leaf extract [OBLE]. X‐ray diffraction (XRD) analysis revealed that Ocimum Basilicum leaf extract mediated Mg−Zn ferrite nanoparticles [OBLE@Mg−Zn NPs] exhibit face centred cubic crystallinity with space group as confirmed by Rietveld refinement studies. Microstructural analysis illustrated uniform surface morphology with well interlinked grain with an average grain size of 35.6±0.12 nm. FTIR spectra showed existence of hydroxyl −OH group at 3403 cm−1 and C=C vibration at 2345 cm−1. Magnetic hysteresis loop (M−H loop) confirmed the superparamagnetic behaviour of OBLE@Mg−Zn NPs. Cytotoxic activity of OBLE@Mg−Zn NPs was carried out against breast cancer cell line MDA‐MB‐231. Dose dependent cell viability of cancerous cells depicted cytotoxic potential of OBLE@Mg−Zn NPs.

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{{\rm F}{\rm d}\bar{3{\rm \ }}{\rm m}}

m showing low goodness of fit parameter (GOF

{\cong }

1.49).…”

Section: Resultsmentioning

confidence: 99%

Magnetically Separable Mg−Zn Ferrite Nanoparticles Synthesized Using Ocimum Basilicum Leaf Extract Potentiates Cytotoxicity: In vitro

Sharma,

Aggarwal,

Kumar

et al. 2023

ChemistrySelect

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show abstract

“…This shift could be due to lattice shrinkage caused by small ionic radii of Cr 3+ ions (0.63 Å) displacing larger Zn 2+ ions (0.82 Å) in the tetrahedral site or Fe 3+ ions (0.64 Å) in the octahedral site. 23,24 The crystallite sizes estimated using the Debye−Scherer equation, utilizing the full width at half-maximum (fwhm) of the most intense peak (311) 25 were found to be 10.1, 14.4, 14.2, and 13.5 nm for pure-ZnF, 0.5-Cr•ZnF, 1.0-Cr•ZnF, and 1.5-Cr•ZnF, respectively. The results indicate an increase in the crystallite size of the nanocrystals as the Cr content was introduced.…”

Section: Characterization Gas Sensing Measurements and Classificationmentioning

confidence: 99%

Chromium-Doped ZnFe₂O₄ Nanostructures for Detection and Accurate Classification of Acetone

Nemufulwi,

Swart,

Shingange

et al. 2024

ACS Appl. Nano Mater.

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The sensing properties of semiconducting metal oxides are influenced by dopants, which introduce point defects and tune their band structure. As a dopant ion, Cr is expected to disrupt the cation distribution in zinc ferrite (ZnFe 2 O 4 ), influencing the electron transfer between cations and conductivity. Thus, the use of Cr dopant should overcome the high operating temperatures and selectivity issues that have hindered the practical application of ZnFe 2 O 4 -based nanosensors, effectively increasing the response variance for accurate gas classification using principal component analysis. Herein, a combustion method was used to synthesize fiber-like Cr-doped ZnFe 2 O 4 nanostructures with different concentration levels of 0.0, 0.5, 1.0, and 1.5 mol %. Microstructural and morphological analyses were conducted using X-ray diffraction and electron microscopy. X-ray photoelectron spectroscopy and photoluminescence were used to analyze the electronic structure and identify the defects. The gas sensing results showed that the sensor based on 1.0 mol % Cr-doped ZnFe 2 O 4 nanostructures had fast response/recovery (45 s/179 s) times and enhanced response of 283 to 90 ppm acetone at a low operating temperature of 90 °C. Moreover, the sensor based on 1.0 mol % Crdoped ZnFe 2 O 4 can be used as a single array sensor for gas classification. The improved sensing properties were attributed to structural defects and proper gas diffusion.

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“…Among these, spinel ferrites, denoted by the chemical formula MFe2O4 where M represents a divalent metal cation, have emerged as the most extensively researched due to their remarkable optical and magnetic properties [11][12][13]. Spinel ferrites find applications in sensors, electromagnets, optoelectronic components, high-frequency devices, and more [14,15]. They exhibit exceptional attributes such as higher resistivity values, magneti-zation, permeability, and lower eddy current losses [16].…”

Section: Introductionmentioning

confidence: 99%

Cr3+ substitution effect on Co-Cu and Cu-Co nano ferrites on structural and morphological properties

Parajuli,

Murali,

Samatha

2023

BIBECHANA

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The Cr3+ substituted Co-Cu (Co0.7Cu0.3Fe2-xCrxO4) and Cu-Co (Cu0.7Co0.3Fe2-xCrxO4) where x = 0.0, 0.05, 0.1, 0.15, 0.2 and 0.25 nano ferrite composite were prepared with the sol-gel approach. Their structural, dc electrical resistivity, and magnetic properties were analyzed. XRD shows the single-phase spinel ferrite. Adding Cr3+ ions decreases the lattice volume and the size of the crystallite respectively. FESEM images show non-spherical particles on a largely uniform surface shape with decreasing grain size on doping Cr3+. The FTIR pattern supports the XRD patterns for spinel ferrite.

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Probing the dc electrical resistivity and magnetic properties of mixed metal oxides Cr3+ substituted Mg–Zn ferrites

Cited by 20 publications

References 32 publications

Magnetically Separable Mg−Zn Ferrite Nanoparticles Synthesized Using Ocimum Basilicum Leaf Extract Potentiates Cytotoxicity: In vitro

Magnetically Separable Mg−Zn Ferrite Nanoparticles Synthesized Using Ocimum Basilicum Leaf Extract Potentiates Cytotoxicity: In vitro

Chromium-Doped ZnFe₂O₄ Nanostructures for Detection and Accurate Classification of Acetone

Cr3+ substitution effect on Co-Cu and Cu-Co nano ferrites on structural and morphological properties

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Probing the dc electrical resistivity and magnetic properties of mixed metal oxides Cr3+ substituted Mg–Zn ferrites

Cited by 20 publications

References 32 publications

Magnetically Separable Mg−Zn Ferrite Nanoparticles Synthesized Using Ocimum Basilicum Leaf Extract Potentiates Cytotoxicity: In vitro

Magnetically Separable Mg−Zn Ferrite Nanoparticles Synthesized Using Ocimum Basilicum Leaf Extract Potentiates Cytotoxicity: In vitro

Chromium-Doped ZnFe2O4 Nanostructures for Detection and Accurate Classification of Acetone

Cr3+ substitution effect on Co-Cu and Cu-Co nano ferrites on structural and morphological properties

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Product

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Chromium-Doped ZnFe₂O₄ Nanostructures for Detection and Accurate Classification of Acetone