Presence of neodymium and gadolinium in cobalt ferrite lattice: Structural, magnetic and microwave features for electromagnetic wave absorbing

Nikzad, Alireza; Parvizi, Roghaieh

doi:10.1016/j.jre.2019.06.010

Cited by 41 publications

(9 citation statements)

References 37 publications

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“…These conditions may be attributed to a decrease in the average particle size in the nanoscale. [24] The broadening of the diffraction peaks is evidence of the presence of Nd 3þ ions doping, which affects the distortion of the structure, so to determine the crystallite size and microstrain of the samples, it is recommended to use the Williamson-Hall (W-H) rather than the Scherrer method. [13] In accordance with the W-H method in Equation (1) considers the effect and combination of crystallite size and its microstrain on peak broadening.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Magnetic and Microwave Absorbing Properties of Nd³⁺ Ion Doped CoFe₂O₄ by Solid‐State Reaction Method

Yunasfi¹,

Mashadi²,

Winatapura³

et al. 2023

Physica Status Solidi (a)

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Research on spinel ferrite is a state-of-the-art and rapidly developing field because this material has attractive electrical and magnetic properties and also exhibits different behavior compared to its bulk form. The general formula for the spinel ferrites material is AB 2 O 4 (A ¼ ion of metal transitions such as Co, Mn, Ni, Zn, and Cu; B ¼ trivalent ion of Fe). The A would occupy the tetrahedral site, and B would occupy the octahedral site of the fcc crystal system. [1,2] One of the spinel ferrites that have a prominent property is cobalt ferrites. The cobalt ferrites possess good properties, namely high permeability due to high saturation magnetization, nonconductive (high resistivity), better chemical stability, and high magnetostriction coefficient. [3][4][5][6] Due to its excellent magnetic characteristics, cobalt ferrite can be used in magnetic storage and microwave devices. In addition, this material is a promising candidate as a magneto-optical recording media and a microwave or RADAR absorbing material because it is chemically stable, has a medium mechanical hardness, and the first-order anisotropy constant has a large positive value. [5][6][7] According to Panda, who has studied the electric transport behavior of nano cobalt ferrite, it shows that the main contributor that affects the conductivity and dielectric properties of materials is the conduction between grain boundaries and surface polarization, while the value of the dielectric constant is determined by the exchange of electrons and holes between Co 3þ -Co 2þ and Fe 2þ -Fe 3þ . [8] Routray also reported that in general the ferroelectric properties of a material are influenced by its compound composition, material homogeneity, crystal defects, and domain orientation. [9] In addition, it was stated that grain size also plays an important role in polarization and ferroelectric behavior. This is related to the presence of an intrinsic conduction mechanism of the magnetic compound and is compatible with its ferroelectric response. According to him, in general, this material has a high conductivity value due to the presence of oxygen vacancy in the polaron mechanism because Fe 2þ and Fe 3þ are present simultaneously. Likewise, according to Chithra that magnetic properties are influenced by changes in ionic magnetic moments, distribution of cations in the lattice, ionic anisotropy, and structural changes in this cobalt ferrite nanomaterial. [10] The requirements for microwave absorbing material must have high permeability and permittivity. [11] The magnetic and dielectric properties of CoFe 2 O 4 can be modified through the substitution of

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Section: Resultsmentioning

confidence: 99%

Enhanced Magnetic and Microwave Absorbing Properties of Nd³⁺ Ion Doped CoFe₂O₄ by Solid‐State Reaction Method

Yunasfi¹,

Mashadi²,

Winatapura³

et al. 2023

Physica Status Solidi (a)

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“…Besides, the composition of ferrite greatly affects its complex permittivity and permeability. Replacing the metal cations in ferrite with rare earth elements, its loss mechanism could be improved significantly . The reasons are as follows: (1) When rare earth elements with larger radius replace metal ions with smaller radius, the lattice constant of ferrite will increase, resulting in lattice distortion to increase the dielectric loss.…”

Section: Research Progresses Of Mamsmentioning

confidence: 99%

“…Replacing the metal cations in ferrite with rare earth elements, its loss mechanism could be improved significantly. 120 The reasons are as follows: (1) When rare earth elements with larger radius replace metal ions with smaller radius, the lattice constant of ferrite will increase, resulting in lattice distortion to increase the dielectric loss. (2) The doping of rare earth elements will increase the anisotropic field and coercive force (Hc) of ferrite, thereby increasing the hysteresis loss.…”

Section: Magnetic Oxides-based Mamsmentioning

confidence: 99%

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

Zuo,

Jia,

et al. 2023

Ind. Eng. Chem. Res.

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The rapid development of 5G communication technology has led to serious electromagnetic wave pollution, and as a result, it is urgent to develop high-performance microwave absorption materials (MAMs) conducive to reducing electromagnetic pollution, which has great use in both the military and civilian fields. In this review article, we first introduce the absorption theory of microwave absorption materials. Then, the recent research progress in microwave absorption materials categorized as dielectric loss MAMs, magnetic loss MAMs, and electromagnetic synergistic loss MAMs are profoundly reviewed according to absorption mechanism. Subsequently, we proceed to review recent achievements in combining wave absorption with other functions including hydrophobicity, infrared stealth, and selfhealing, aiming at developing advanced multifunctional MAMs adapted to various extreme environments during practical applications. Finally, the challenges are presented, and prospects for potential opportunities in this rapidly blossoming field are discussed accordingly. We hope this critical review is timely, which could provide guidance for those who are committed to designing absorbers with better fundamental understanding and practical application.

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“…Composition, microstructure, thickness, and type of dopant have significantly affected the performance of EM wave absorption. 9 The rare earth element as a dopant material for enhancing the absorption performance, ex. La has promising material doping for CoFe 2 O 4 , which can be sitting in Co lattice structure.…”

Section: A Brief Review Of Various Materials For Mamsmentioning

confidence: 99%

High Absorption Electromagnetic Wave Properties of Composite CoFeO₃ Synthesized by Simple Mechanical Alloying

Heryanto¹,

Tahir²

2021

ECS J. Solid State Sci. Technol.

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Electronic equipment demand is strongly correlated to the electromagnetic wave interference (EMI), which causes severe effects on human health. Microwave absorbing materials (MAMs) are one method to protect human health from EMI. Cobalt nanoparticles show high performance as MAMs. Here, we have synthesized CoFeO3 by simple mechanical alloying for increased multiple reflections, interfacial polarization, magnetic domain loss, electron spin loss, internal resonance, hoping electron, conductive loss, and multiple scattering for improved absorption of EMI waves. We determined the electronic properties from the Quantum Espresso (QE) and corresponding results are discussed. The metallic character comes from the d-state of transition metal atoms Fe (II) and Co which are sufficiently large in magnitude in the Fermi level of band structure and density of state (DOS) distribution. Crystallite size in the range of 13.6 to 18.7 nm with surface morphology shows irregular shapes of the particles. For CoFeO3 as MAMs, we found that the reflection loss (RL) is -55 dB (lower than the previous reported -43.2 dB) at 10-11 GHz for a thickness of 8 mm, indicating that this study shows high potential of CoFeO3 as an alternative composite for MAMs applications.

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Presence of neodymium and gadolinium in cobalt ferrite lattice: Structural, magnetic and microwave features for electromagnetic wave absorbing

Cited by 41 publications

References 37 publications

Enhanced Magnetic and Microwave Absorbing Properties of Nd³⁺ Ion Doped CoFe₂O₄ by Solid‐State Reaction Method

Enhanced Magnetic and Microwave Absorbing Properties of Nd³⁺ Ion Doped CoFe₂O₄ by Solid‐State Reaction Method

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

High Absorption Electromagnetic Wave Properties of Composite CoFeO₃ Synthesized by Simple Mechanical Alloying

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Presence of neodymium and gadolinium in cobalt ferrite lattice: Structural, magnetic and microwave features for electromagnetic wave absorbing

Cited by 41 publications

References 37 publications

Enhanced Magnetic and Microwave Absorbing Properties of Nd3+ Ion Doped CoFe2O4 by Solid‐State Reaction Method

Enhanced Magnetic and Microwave Absorbing Properties of Nd3+ Ion Doped CoFe2O4 by Solid‐State Reaction Method

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

High Absorption Electromagnetic Wave Properties of Composite CoFeO3 Synthesized by Simple Mechanical Alloying

Contact Info

Product

Resources

About

Enhanced Magnetic and Microwave Absorbing Properties of Nd³⁺ Ion Doped CoFe₂O₄ by Solid‐State Reaction Method

Enhanced Magnetic and Microwave Absorbing Properties of Nd³⁺ Ion Doped CoFe₂O₄ by Solid‐State Reaction Method

High Absorption Electromagnetic Wave Properties of Composite CoFeO₃ Synthesized by Simple Mechanical Alloying