Enabling cobalt ferrite (CoFe2O4) for low magnetic field strain responsivity through Bi3+ substitution: Material for magnetostrictive sensors

Anantharamaiah, P.N.; Shashanka, H.M.; Saha, Sujoy; Chelvane, J. Arout; Sahoo, Balaram

doi:10.1016/j.jallcom.2021.160285

Cited by 25 publications

(8 citation statements)

References 36 publications

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“…Even the Curie temperature ( T C ) of the samples is strongly influenced by the strength of magnetic superexchange interactions between A- and B-sublattices via oxygen (A-O-B). For x = 0.00 (CoFe 2 O 4 ), we found a T C of 522 °C, which is consistent with the T C values reported for CFO-systems . In CoFe 2 O 4 , both sublattices are occupied by magnetic cations, leading to a high degree of magnetic superexchange interactions.…”

Section: Resultssupporting

confidence: 89%

“…For x = 0.00 (CoFe 2 O 4 ), we found a T C of 522 °C, which is consistent with the T C values reported for CFO-systems. 14 In CoFe 2 O 4 , both sublattices are occupied by magnetic cations, leading to a high degree of magnetic superexchange interactions. More heat energy (thermal energy) is required to break the A-O-B magnetic interactions and randomize the magnetic moments, resulting in a high T C for the parent sample.…”

Section: Chemical Bonding�ftir and Raman Spectroscopymentioning

confidence: 99%

“…Ferri- and ferromagnetic materials, which exhibit magnetostriction, received considerable interest from the scientific and engineering community for research and development activities. − Magnetostriction, which is the change in dimension of a magnetic material in the magnetic field, is considered a smart phenomenon, and materials that can exhibit magnetostriction are considered smart materials. ,− Cobalt ferrite (CoFe 2 O 4 ; CFO) is one of the widely known magnetostrictive smart materials. − Due to its high magnetostriction strain (λ), which exists in both single-crystal and polycrystalline forms, CFO and CFO-based composites constitute extensively studied ceramic magnetostrictive smart materials. ,,,,− Because of their exceptional magnetic and magnetostrictive properties, CFO and CFO-based composites find application as sensors in a variety of systems. , Additionally, CFO has been investigated as an active ingredient for multiferroic particulate composites composed of magnetostrictive and piezoelectric phases. , …”

Section: Introductionmentioning

confidence: 99%

“…Apart from the electronic and magnetic properties, CFO also demonstrates outstanding chemical and thermal resilience, which make them quite interesting for chemical catalysis and pharmaceutical industries. In view of these fundamental properties, intrinsic or doped CFO are currently receiving significant attention for exploitation in magnetic hard drives, magnetic ferrofluid technology, magnetocaloric refrigeration, chemical sensors, photocatalysis, cleaner fuel production, rod antennas, high-quality filters, and magnetic field sensors. − ,− Apart from these exceptional properties, the composites of spinel ferrites/metal oxides are also used as high-performance electrode materials for energy storage devices. , Some of the metal nanoparticles capped with suitable capping agents are also employed for magnetic resonance imaging applications …”

Section: Introductionmentioning

confidence: 99%

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Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

et al. 2023

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We report on the influence of Al and Zn co-substitution on the structural, magnetic, and magnetostrictive properties of cobalt ferrite (Co1–x Zn x Fe2–x Al x O4, 0 ≤ x ≤ 0.15; CZFAO) materials, which were made using a glycine-nitrate autocombustion process. The cubic spinel structure is present in both the as-synthesized and the sintered CZFAO samples, where it was evident that the crystallite size and lattice parameter reduced with increasing x due to the incorporation of smaller Al3+ ions in place of larger Fe3+ ions in spinel ferrite. Co-substitution induced changes in the metal–oxygen bond lengths, causing both the tetrahedral and octahedral infrared and Raman spectroscopic bands to shift toward higher wavenumbers. The electron microscopy analyses indicate that the Al–Zn substitution induces grain growth, leading to a dense, interconnected grain morphology. Mossbauer analyses indicate that the Al3+ occupies the octahedral site, whereas Zn2+ is substituted at the tetrahedral site. Due to equal magnetic dilution of both tetrahedral and octahedral sites caused by the presence of Zn and Al at the appropriate sites, the saturation magnetization M S of CZFAO is the same as that of pure CFO. All other magnetic parameters (coercivity H C, magnetocrystalline anisotropy constant K 1, and Curie temperature T C) decrease with increasing x, where the decline observed is mostly due to superexchange interaction (A-O-B) reduction caused by the substituents’ non-magnetic character. CZFAO materials exhibit higher magnetostriction strain λ and strain sensitivity dλ/dH at relatively low magnetic fields; among all the samples, x = 0.15 demonstrates a maximum strain sensitivity of −2.53 × 10–9 m/A at 23 kA/m magnetic field. The composition-tuned CZFAO materials with desirable properties are suitable for application in torque sensors.

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Section: Resultssupporting

confidence: 89%

Section: Chemical Bonding�ftir and Raman Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

et al. 2023

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“…Synthesis. The autocombustion method, reported elsewhere, 40 has been adapted to synthesize the Ni 1−x Co x Fe 2 O 4 (0 ≤ x ≤ 1) samples using metal nitrates (Ni(NO 3 ) 2 •6H 2 O, 99%, Loba Chemie; Co(NO 3 ) 2 •6H 2 O, 99%, SD fine Chem; Fe(NO 3 ) 3 •9H 2 O, 98%, SD fine Chem; and glycine (NH 2 CH 2 COOH), 99.5%, Merck) as starting materials. Briefly, a homogeneous mixture of metal nitrates, taken according to nominal composition, solution, and glycine (1 mol/M + ) was heated on a hot plate (∼200 °C).…”

Section: ■ Introductionmentioning

confidence: 99%

Effect of High-Anisotropic Co²⁺ Substitution for Ni²⁺ on the Structural, Magnetic, and Magnetostrictive Properties of NiFe₂O₄: Implications for Sensor Applications

Satish

Shashanka

Saha

et al. 2023

ACS Appl. Mater. Interfaces

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This work reports on the effect of substituting a low-anisotropic and low-magnetic cation (Ni 2+ , 2μ B ) by a high-anisotropic and high-magnetic cation (Co 2+ , 3μ B ) on the crystal structure, phase, microstructure, magnetic properties, and magnetostrictive properties of NiFe 2 O 4 (NFO). Co-substituted NFO (Ni 1−x Co x Fe 2 O 4 , NCFO, 0 ≤ x ≤ 1) nanomaterials were synthesized using glycine-nitrate autocombustion followed by postsynthesis annealing at 1200 °C. The X-ray diffraction measurements coupled with Rietveld refinement analyses indicate the significant effect of Co-substitution for Ni, where the lattice constant (a) exhibits a functional dependence on composition (x). The a-value increases from 8.3268 to 8.3751 Å (±0.0002 Å) with increasing the "x" value from 0 to 1 in NCFO. The a−x functional dependence is derived from the ionic-size difference between Co 2+ and Ni 2+ , which also induces grain agglomeration, as evidenced in electron microscopy imaging. The chemical bonding of NCFO, as probed by Raman spectroscopy, reveals that Co(x)-substitution induced a red shift of the T 2g (2) and A 1g (1) modes, and it is attributed to the changes in the metal−oxygen bond length in the octahedral and tetrahedral sites in NCFO. X-ray photoelectron spectroscopy confirms the presence of Co 2+ , Ni 2+ , and Fe 3+ chemical states in addition to the cation distribution upon Co-substitution in NFO. Chemical homogeneity and uniform distribution of Co, Ni, Fe, and O are confirmed by EDS. The magnetic parameters, saturation magnetization (M S ), remnant magnetization (M r ), coercivity (H C ), and anisotropy constant (K 1 ) increased with increasing Co-content "x" in NCFO. The magnetostriction (λ) also follows a similar behavior and almost linearly varies from −33 ppm (x = 0) to −227 ppm (x = 1), which is primarily due to the high magnetocrystalline anisotropy contribution from Co 2+ ions at the octahedral sites. The magnetic and magnetostriction measurements and analyses indicate the potential of NCFO for torque sensor applications. Efforts to optimize materials for sensor applications indicate that, among all of the NCFO materials, Co-substitution with x = 0.5 demonstrates high strain sensitivity (−2.3 × 10 −9 m/A), which is nearly 2.5 times higher than that obtained for their intrinsic counterparts, namely, NiFe 2 O 4 (x = 0) and CoFe 2 O 4 (x = 1).

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Inkjet Printing of Cobalt Ferrite for Hard Ferromagnetic Thick Films Manufacturing

Mariani,

Cervellera,

Migliori

et al. 2024

Adv Eng Mater

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Inkjet printing is a versatile and cheap technique for the fabrication of films, offering unique advantages in terms of scalability, precision, and customization. In recent years, there has been a growing interest in utilizing inkjet printing technology for the deposition of magnetic films with tailored properties. Cobalt ferrite (CoFe2O4) stands out due to its exceptional magnetic properties, including high coercivity, saturation magnetization, and excellent chemical stability. This paper presents a comprehensive study on the inkjet printing of cobalt ferrite magnetic films, focusing on the manufacturing process, especially on the different factors that could lead to stable multilayer depositions to achieve high thicknesses: ink solid loading, drop spacing, substrate temperature, and interlayers drying. Finally, the microstructure of the samples is investigated to identify the occurring defects after sintering between 800 and 1000 °C. The magnetic properties of the films are determined, revealing a maximum coercivity of 1.98 kOe and a magnetic saturation of 78.25 emu cm−3.

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Enabling cobalt ferrite (CoFe2O4) for low magnetic field strain responsivity through Bi3+ substitution: Material for magnetostrictive sensors

Cited by 25 publications

References 36 publications

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

Effect of High-Anisotropic Co²⁺ Substitution for Ni²⁺ on the Structural, Magnetic, and Magnetostrictive Properties of NiFe₂O₄: Implications for Sensor Applications

Inkjet Printing of Cobalt Ferrite for Hard Ferromagnetic Thick Films Manufacturing

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Enabling cobalt ferrite (CoFe2O4) for low magnetic field strain responsivity through Bi3+ substitution: Material for magnetostrictive sensors

Cited by 25 publications

References 36 publications

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

Aluminum and Zinc Co-substituted Cobalt Ferrite: Structural, Magnetic, and Magnetostrictive Properties

Effect of High-Anisotropic Co2+ Substitution for Ni2+ on the Structural, Magnetic, and Magnetostrictive Properties of NiFe2O4: Implications for Sensor Applications

Inkjet Printing of Cobalt Ferrite for Hard Ferromagnetic Thick Films Manufacturing

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Product

Resources

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Effect of High-Anisotropic Co²⁺ Substitution for Ni²⁺ on the Structural, Magnetic, and Magnetostrictive Properties of NiFe₂O₄: Implications for Sensor Applications