Effect of terbium doping on the optical, electrical and magnetic properties of nanocrystalline nickel ferrite

Atta, Shubhadip; Halder, Monalisa; Meikap, Ajit Kumar

doi:10.1007/s10854-021-05407-6

Cited by 14 publications

(7 citation statements)

References 48 publications

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“…are consistent with the values reported in the literature for the nickel ferrite systems [53,59,60,65]. The Mott VRH model set some criteria which have to be fulfilled for its applicability such as activation energy should be greater than thermal energy (i.e.…”

Section: Ac Conductivitysupporting

confidence: 88%

“…Numerous studies on temperature dependent dc conductivity have been performed in low temperature region (T293) using Mott variable range hopping (VRH) equation for spinel ferrite system [24,53,56,58,59]. However some reports are available in recent literature where temperature dependent dc conductivity for spinel ferrite system has been analyzed employing Mott variable range hopping equation (VRH) in the high temperature region (T300 K) [60][61][62][63]. In view of the above, we have analyzed the temperature dependent dc conductivity of present samples using Mott variable range hopping (VRH) equation in the high temperature range (T300 K).…”

Section: Ac Conductivitymentioning

confidence: 99%

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Electrical transport properties of nanocrystalline and bulk nickel ferrite using complex impedance spectroscopy: a comparative study

Paswan¹,

Pradhan²,

Kumar³

et al. 2022

Phys. Scr.

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In this work, the comparative study on the electrical transport properties of nanocrystalline nickel ferrite (NiFe2O4) and its bulk counterpart has been carried out in detail by using complex impedance spectroscopy in a wide range of frequencies (100 Hz-1MHz) and temperatures (40°C-320°C).The dispersive nature of the dielectric constant and loss factor is explained by the Maxwell-Wagner model and Koop’s phenomenological theory. The value of the dielectric constant for nanocrystalline nickel ferrite is found to be more as compared to its bulk counterpart. The frequency variation dielectric permittivity is well fitted with the modified Debye formula, which suggests the presence of multiple relaxation processes. The temperature dependent ac conductivity follows Jonscher’s universal power law and reveals the presence of multiple transport mechanisms from small polaron hopping (SPH) to correlated barrier hopping (CBH) mechanism near 200°C.The estimated values of Mott parameters are found to be satisfactory. Thermally activated relaxation phenomena have been confirmed by scaling curves of imaginary impedance (Z") and modulus (M"). The comparison between the Z" and M" spectra indicates that both long-range and short-range movement of charge carriers contribute to dielectric relaxation with short-range charge carriers predominating at low temperatures while long-range charge carriers are dominating at high temperatures. Analysis of the semicircular arcs of Nyquist plot indicates the presence of grain boundary contribution to the electrical conduction process for the nanocrystalline sample at high temperatures. The non-Debye type of relaxation has been examined by stretching exponential factor (β) which has been estimated by fitting the modified KWW (Kohlrausch-Williams-Watts) equation to the imaginary electric modulus curve. The value of β is found to be strongly temperature dependent and its value for the nanocrystalline sample is less than that of the bulk system which is explained on the basis of dipole-dipole interaction.

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Section: Ac Conductivitysupporting

confidence: 88%

Section: Ac Conductivitymentioning

confidence: 99%

Electrical transport properties of nanocrystalline and bulk nickel ferrite using complex impedance spectroscopy: a comparative study

Paswan¹,

Pradhan²,

Kumar³

et al. 2022

Phys. Scr.

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“…38 As a result of the site-preferred substitution of Eu in place of Fe, the lattice parameter improves, which boosts the A-B superexchange interaction, and it can be the most probable reason for the upcharges of the M s counterpart with the increment in Eu doping concentration. [39][40][41] According to XRD analysis, Eu 3+ cations substituting at octahedral Fe 3+ sites initiate the increasing bond lengths Fe 3+ (Eu 3+ )-O 2− and bond angles Fe 3+ (Eu 3+ )-O 2− -Eu 3+ (Fe 3+ ). As bond lengths and angles increase, the coordination of cations will be weaker, oxygen deciency will be more pronounced, and most interestingly, it will reduce exchange interaction and magnetic parameters.…”

Section: Magnetic Studymentioning

confidence: 99%

Role of site selective substitution, magnetic parameter tuning, and self heating in magnetic hyperthermia application: Eu-doped magnetite nanoparticles

Hazarika

2023

RSC Adv.

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“…The studies clearly demonstrate that the cation type (magnetic/non-magnetic), concentration (low/high), and preferred crystallographic site (tetrahedral/octahedral) are the key factors that affect ferrite properties and degree of magnetostriction. − Numerous reports exist in the literature, where the substitution of a wide variety of cations, including rare-earth (RE) ions, into single-phase NFO has been considered to derive properties and performance so as to meet the requirements of a given application. For instance, Jacob et al and Atta et al independently studied and reported the terbium (Tb 3+ )-substituted NFO nanoparticles synthesized using the sol–gel method to enhance the structural, optical, dielectric, and magnetic properties of spinel NFO. , Sagayaraj et al reported the study of (Tb 3+ ) substitution for nickel (Ni 2+ ) as well as Fe 3+ in Ni 0.5 MTb 0.5M Fe 2M O 4 /PVP by the oxalate coprecipitation method and the superparamagnetic behavior of the synthesized sample . Further, Annie Vinosha et al reported dysprosium (Dy 3+ )-substituted NFO nanoparticles prepared using the coprecipitation method wherein the coercivity ( H c ) and magnetic saturation ( M s ) decrease as the Dy 3+ concentration increases .…”

Section: Introductionmentioning

confidence: 99%

“…18,19 Sagayaraj et al reported the study of (Tb 3+ ) substitution for nickel (Ni 2+ ) as well as Fe 3+ in Ni 0.5 MTb 0.5M Fe 2M O 4 /PVP by the oxalate coprecipitation method and the superparamagnetic behavior of the synthesized sample. 20 Further, Annie Vinosha et al reported dysprosium (Dy 3+…”

mentioning

confidence: 99%

Effect of Dy³⁺ and Tb³⁺ Rare-Earth Cation Co-Substitution on the Structure, Magnetic, and Magnetostrictive Properties of Ni-Co-Ferrites

et al. 2023

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The design and development of electromagnetic and magnetoelectric materials with enhanced properties and performance are desirable for numerous technologies, which are based on integrated electromagnetic materials and components. Nevertheless, engineering the crystalline materials with multi-complex chemistry and multiple cations is challenging. In this context, herein, we report on the effect of rare-earth (RE) cations, namely, Dy 3+ and Tb 3+ , cosubstituted into the Co-Ni-mixed ferrite materials for applications in stress/torque sensors. The RE-cations that co-substituted Co-Niferrite materials with a composition of Ni 0.8 Co 0.2 Fe 2−x (Dy 1−y Tb y ) x O 4 (x = 0−0.1, y = 0.3; NCFDT) were prepared by the hightemperature solid-state chemical reaction method. The effect of variable composition (x) on the structure, morphology, chemical bonding, and magnetic properties of NCFDT materials is investigated in detail, and the structure−property optimization enabled realizing magnetostrictive NCFDT for sensor applications. X-ray diffraction analysis coupled with Rietveld refinement confirms the face-centered cubic crystal structure. Chemical bonding analysis made using Raman spectroscopic and Fourier transform infrared spectroscopic measurements validates the active modes corresponding to the spinel ferrite structure. The effect of Dy 3+ and Tb 3+ substitution is primarily seen in the grain size (range of 5− 15 μm), as evident from the scanning electron microscopy patterns. Energy-dispersive spectroscopy confirms the presence of all constituent elements with expected composition and without any impurities. The magnetic property measurements indicate that the remnant magnetization (M r ) increases from 0.06 to 0.17 μ B /f.u. with the rare-earth (Dy and Tb) substitution and has achieved the maximum squareness ratio (M r /M s ) = 0.097 at x = 0.10. To validate their application potential in magneto-mechanical sensors, we have measured the magnetostriction coefficients (λ 11 and λ 12 ), which demonstrate high values of λ 11 = −92 ppm (along the parallel direction) and λ 12 = 66 ppm (along the perpendicular direction) for NCFDT with x = 0.05 at H = 7000 Oe. In addition, the maximum value of strain sensitivity is observed, particularly H d d 11 = −0.764 nm/A whereas H d d 12 = 0.361 nm/A. The correlationbetween strain sensitivity (dλ/dH) and susceptibility (dM/dH), as derived from magnetostriction and magnetization measurements, respectively, is established. The outcomes of this study indicate that Ni-Co-ferrites with Dy 3+ and Tb 3+ substitution are suitable for stress/torque sensors. These NCFDT ferrites may also be useful as a necessary constitutive phase for the manufacture of magnetoelectric composite materials, making them appropriate for magnetic field sensors and energy harvesting applications.

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Effect of terbium doping on the optical, electrical and magnetic properties of nanocrystalline nickel ferrite

Cited by 14 publications

References 48 publications

Electrical transport properties of nanocrystalline and bulk nickel ferrite using complex impedance spectroscopy: a comparative study

Electrical transport properties of nanocrystalline and bulk nickel ferrite using complex impedance spectroscopy: a comparative study

Role of site selective substitution, magnetic parameter tuning, and self heating in magnetic hyperthermia application: Eu-doped magnetite nanoparticles

Effect of Dy³⁺ and Tb³⁺ Rare-Earth Cation Co-Substitution on the Structure, Magnetic, and Magnetostrictive Properties of Ni-Co-Ferrites

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Effect of terbium doping on the optical, electrical and magnetic properties of nanocrystalline nickel ferrite

Cited by 14 publications

References 48 publications

Electrical transport properties of nanocrystalline and bulk nickel ferrite using complex impedance spectroscopy: a comparative study

Electrical transport properties of nanocrystalline and bulk nickel ferrite using complex impedance spectroscopy: a comparative study

Role of site selective substitution, magnetic parameter tuning, and self heating in magnetic hyperthermia application: Eu-doped magnetite nanoparticles

Effect of Dy3+ and Tb3+ Rare-Earth Cation Co-Substitution on the Structure, Magnetic, and Magnetostrictive Properties of Ni-Co-Ferrites

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Effect of Dy³⁺ and Tb³⁺ Rare-Earth Cation Co-Substitution on the Structure, Magnetic, and Magnetostrictive Properties of Ni-Co-Ferrites