Investigation of structural, thermal and magnetic properties of cadmium substituted cobalt ferrite nanoparticles

Reddy, Ch. Venkata; Byon, Chan; Narendra, B.; Baskar, Dinesh; Gadipelli, Srinivas; Shim, Jaesool; Vattikuti, S.V. Prabhakar

doi:10.1016/j.spmi.2015.02.014

Cited by 47 publications

(5 citation statements)

References 43 publications

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“…In addition, structural defects such as oxygen vacancies and lattice strains also increase the coercivity. 55 The rise of coercivity depicts transition of the magnetic single-domain to the multidomain where the exchange coupling becomes strong, which results in a lesser disorder magnetic anisotropy among domains. 56 The strong exchange coupling leads to an increase in retentivity with respect to annealing temperature, suggesting growth of anisotropic properties.…”

Section: Results and Discussionmentioning

confidence: 99%

Role of Ruthenium in the Dielectric, Magnetic Properties of Nickel Ferrite (Ru–NiFe₂O₄) Nanoparticles and Their Application in Hydrogen Sensors

Manikandan¹,

Mirzaei

Vigneselvan³

et al. 2019

ACS Omega

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In this work, Ru-doped nickel ferrites (NiFe 2 O 4 ) were synthesized by a chemical co-precipitation method. Subsequently, they were annealed at different temperatures. The crystallinity of the samples was evaluated using X-ray diffraction and the morphology of the samples was investigated by scanning electron microscopy and transmission electron microscopy. Dielectric constants and dielectric loss were studied. Ru-doped nickel ferrite samples showed relatively low dielectric constant and loss. Also, the dielectric constant and loss decreased with increasing annealing temperature. Vibrational sample magnetometer analysis shows the hysteresis loop of a soft magnetic nature and the relevant parameters ( M r, M s and H c ) have low values that confirmed the nature of the material. Subsequently, gas sensors were fabricated to study hydrogen-sensing properties. The gas sensors showed a response to hydrogen gas at a low temperature (100 °C) with selective response in the presence of NH 3 and C 2 H 5 OH gases. The reasons for electrical, magnetic, and sensing behavior of the samples were discussed in detail.

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Section: Results and Discussionmentioning

confidence: 99%

Role of Ruthenium in the Dielectric, Magnetic Properties of Nickel Ferrite (Ru–NiFe₂O₄) Nanoparticles and Their Application in Hydrogen Sensors

Manikandan¹,

Mirzaei

Vigneselvan³

et al. 2019

ACS Omega

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“…The influences of magnetic ion substitution such as Ni 2+ , [17] Mn 2+ , [18] Gd 3+ , [19] and Cr 3+ [20] on structural, magnetic, electric, and dielectric properties of CoFe 2 O 4 have been investigated. Nevertheless, several researchers have reported on non-magnetic ions such as Al 3+ , [21] Y 3+ , [22] Zn 2+ , [23] Cu 2+ [24] or Cd 2+ [25] substituting CoFe 2 O 4 and very few detailed studies of the Mg 2+ . Magnesium ions with non-magnetic nature are known for achieving control over magnetic parameters in developing magnetic recording technology and they have a preference for strong B sites.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mg substitution on the structural and magnetic properties of Co _0.5 Ni _{0.5−
x} Mg _x Fe ₂ O ₄ nanoparticle ferrites

Rosnan

Othaman

Hussin³

et al. 2016

Chinese Phys. B

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In this study, nanocrystalline Co-Ni-Mg ferrite powders with composition Co 0.5 Ni 0.5−x Mg x Fe 2 O 4 are successfully synthesized by the co-precipitation method. A systematic investigation on the structural, morphological and magnetic properties of un-doped and Mg-doped Co-Ni ferrite nanoparticles is carried out. The prepared samples are characterized using x-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and vibrating sample magnetometry (VSM). The XRD analyses of the synthesized samples confirm the formation of single-phase cubic spinel structures with crystallite sizes in a range of ∼ 32 nm to ∼ 36 nm. The lattice constant increases with increasing Mg content. FESEM images show that the synthesized samples are homogeneous with a uniformly distributed grain. The results of IR spectroscopy analysis indicate the formation of functional groups of spinel ferrite in the co-precipitation process. By increasing Mg 2+ substitution, room temperature magnetic measurement shows that maximum magnetization and coercivity increase from ∼ 57.35 emu/g to ∼ 61.49 emu/g and ∼ 603.26 Oe to ∼ 684.11 Oe (1 Oe = 79.5775 A•m −1 ), respectively. The higher values of magnetization M s and M r suggest that the optimum composition is Co 0.5 Ni 0.4 Mg 0.1 Fe 2 O 4 that can be applied to high-density recording media and microwave devices.

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“…All the Samples show a spherical shape and a narrow size distribution. 35 Synthesized samples chemical analysis observed by EDAX. It is a significant and standard method used to identify and analyses the elemental composition of the surface of very small sample in the material.…”

Section: − ( )=mentioning

confidence: 99%

Co³⁺ Doped CdFe₂O₄ Nanoparticles: Structural, Optical, Magnetic, and Electrical Properties

Satayanarayana Goud,

Venkatesh,

Ravi Kumar

et al. 2024

ECS J. Solid State Sci. Technol.

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Through the citrate-gel auto-combustion technique, we synthesized Co-doped cadmium nano ferrites (NFs) with the formula CoxCd1−xFe2O4 (where 0 ≤ x ≤ 1.0 with increments of 0.2). The synthesized materials underwent comprehensive analysis utilizing X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy. Magnetic and electrical properties were evaluated using a vibrating sample magnetometer and LCR meter, respectively. XRD analysis confirmed the spinel phase structure and FD3M space group. SEM analysis revealed agglomerations of nanoparticles and grain boundaries. Elemental analysis of the synthesized nanomaterials was provided by energy dispersive spectroscopy. FTIR spectroscopy identified two main broad bands corresponding to the tetrahedral (A) and octahedral (B) sites, confirming the spinel structure. Magnetic properties such as magnetic saturation, coercivity, and remanent magnetization were characterized using VSM. Additionally, the LCR meter assessed frequency and temperature-dependent dielectric parameters, including AC conductivity (σAC), dielectric permittivity, dielectric loss (tan δ), and impedance spectra. An increase in AC conductivity (σAC) was observed with increasing temperature and frequency.

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Investigation of structural, thermal and magnetic properties of cadmium substituted cobalt ferrite nanoparticles

Cited by 47 publications

References 43 publications

Role of Ruthenium in the Dielectric, Magnetic Properties of Nickel Ferrite (Ru–NiFe₂O₄) Nanoparticles and Their Application in Hydrogen Sensors

Role of Ruthenium in the Dielectric, Magnetic Properties of Nickel Ferrite (Ru–NiFe₂O₄) Nanoparticles and Their Application in Hydrogen Sensors

Effects of Mg substitution on the structural and magnetic properties of Co _0.5 Ni _{0.5−
x} Mg _x Fe ₂ O ₄ nanoparticle ferrites

Co³⁺ Doped CdFe₂O₄ Nanoparticles: Structural, Optical, Magnetic, and Electrical Properties

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Investigation of structural, thermal and magnetic properties of cadmium substituted cobalt ferrite nanoparticles

Cited by 47 publications

References 43 publications

Role of Ruthenium in the Dielectric, Magnetic Properties of Nickel Ferrite (Ru–NiFe2O4) Nanoparticles and Their Application in Hydrogen Sensors

Role of Ruthenium in the Dielectric, Magnetic Properties of Nickel Ferrite (Ru–NiFe2O4) Nanoparticles and Their Application in Hydrogen Sensors

Effects of Mg substitution on the structural and magnetic properties of Co 0.5 Ni 0.5− x Mg x Fe 2 O 4 nanoparticle ferrites

Co3+ Doped CdFe2O4 Nanoparticles: Structural, Optical, Magnetic, and Electrical Properties

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Role of Ruthenium in the Dielectric, Magnetic Properties of Nickel Ferrite (Ru–NiFe₂O₄) Nanoparticles and Their Application in Hydrogen Sensors

Role of Ruthenium in the Dielectric, Magnetic Properties of Nickel Ferrite (Ru–NiFe₂O₄) Nanoparticles and Their Application in Hydrogen Sensors

Effects of Mg substitution on the structural and magnetic properties of Co _0.5 Ni _{0.5−
x} Mg _x Fe ₂ O ₄ nanoparticle ferrites

Co³⁺ Doped CdFe₂O₄ Nanoparticles: Structural, Optical, Magnetic, and Electrical Properties