Room-temperature multiferroicity and magnetoelectric couplings in (Co0.75Al0.25)2(Fe0.75Mg0.25)O4 spinel films

Ren, Xianming; Han, Yemei; Chen, Xuegang; Fu, Yi; Wang, Fang; Hu, Kai; Sun, Zheng; Zhang, Kailiang

doi:10.1016/j.jallcom.2022.165918

Cited by 7 publications

(4 citation statements)

References 58 publications

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“…Magnetoelectric materials refer to multiferroic materials, namely, materials that exhibit two or more types of ferro-ordering (ferromagnetic/antiferromagnetic, ferroelectric, ferroelastic) and transform one type of energy to another [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. In such materials the latter is usually observed as a so-called magnetoelectric effect (MEE)—the appearance of electrical polarization in the material under an external magnetic field—as well as the inverse effect [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Magnetoelectric Effect of Soft Layered Composites with a Magnetic Elastomer

et al. 2023

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Multilayered magnetoelectric materials are of great interest for investigations due to their unique tuneable properties and giant values of magnetoelectric effect. The flexible layered structures consisting of soft components can reveal lower values of the resonant frequency for the dynamic magnetoelectric effect appearing in bending deformation mode. The double-layered structure based on the piezoelectric polymer polyvinylidene fluoride and a magnetoactive elastomer (MAE) with carbonyl iron particles in a cantilever configuration was investigated in this work. The gradient AC magnetic field was applied to the structure, causing the bending of the sample due to the attraction acting on the magnetic component. The resonant enhancement of the magnetoelectric effect was observed. The main resonant frequency for the samples depended on the MAE properties, namely, their thickness and concentration of iron particles, and was 156–163 Hz for a 0.3 mm MAE layer and 50–72 Hz for a 3 mm MAE layer; the resonant frequency depended on bias DC magnetic field as well. The results obtained can extend the application area of these devices for energy harvesting.

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Section: Introductionmentioning

confidence: 99%

Dynamic Magnetoelectric Effect of Soft Layered Composites with a Magnetic Elastomer

et al. 2023

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“…In the case of inverse spinel CoFe 2 O 4 , Fe 3+ ions occupy the tetrahedral sites in the lattice of spinel ferrite, and the octahedral site is equally shared between divalent (Co 2+ ) and trivalent metal cations (Fe 3+ ) in the crystal lattice [3]. Cobalt ferrite (CFO) is extensively employed in different fields like sensing, information storage devices, supercapacitors, batteries, photocatalysts, ferrofluids, etc [4,5].…”

Section: Introductionmentioning

confidence: 99%

Advancements in multiferroic, dielectric, and impedance properties of copper–yttrium co-doped cobalt ferrite for hydroelectric cell applications

Jain,

Shankar,

Thakur

2024

J. Phys.: Condens. Matter

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This paper explores yttrium and copper co-doped cobalt ferrite [Co1-xCuxFe1.85Y0.15O4] synthesized via the sol-gel auto combustion route (0.0 ≤ x ≤ 0.08). Investigating the impact of co-dopants on CoFe2O4, the study reveals altered cation distribution affecting structure, multiferroic, and electrical properties. XRD studies show nanocrystalline co-doped cobalt ferrites with lattice expansion and smaller grains due to Cu-Y co-doping. FTIR confirms inverse spinel family classification with tetrahedral lattice shrinkage. FESEM indicates a grain size of approximately 0.12 μm. Ferroelectric analysis reveals a peak saturation polarization of 23.42 μC/cm2 for 8% copper doping, attributed to increased Fe3+ ions at tetrahedral sites. Saturation magnetization peaks at 54.4706 emu/g for 2% Cu2+ ion substitution [Co0.98Cu0.02Fe1.85Y0.15O4] and decreases to 37.09 emu/g for 4% Cu substitution due to irregular iron atom distribution at tetrahedral sites. Dielectric studies uncover Maxwell-Wagner Polarization and high resistance in grain and grain boundaries using Impedance Spectroscopy. Fabricated hydroelectric cells exhibit improved ionic diffusion, suggesting potential applications.

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“…There is rare existence of crystalline multiferroic compounds in which ferromagnetism and ferroelectricity coexist at room temperature 1 . Due to their potential application in the developing field of information storage, spintronics, and multiple-state memory storage devices, such compounds are currently under intensive study 2 , 3 . Enormous attempts were made to improve the room temperature ferromagnetism and ferroelectricity in perovskite ceramics.…”

Section: Introductionmentioning

confidence: 99%

Construction and characterization of nano-oval BaTi0.7Fe0.3O3@NiFe2O4 nanocomposites as an effective platform for the determination of H2O2

Magar

Mansour

Hassan

et al. 2023

Sci Rep

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Talented di-phase ferrite/ferroelectric BaTi0.7Fe0.3O3@NiFe2O4 (BFT@NFO) in oval nano-morphology was chemically synthesized using controlled sol–gel processes and calcined at 600 °C. The effects of shielding using NiFe2O4 (NFO) nanoparticles on the microstructure, phase transition, thermal, and relative permittivity of BaTi0.7Fe0.3O3 (BTF) nano-perovskite were systematically explored. X-ray diffraction patterns and Full-Prof software exhibited the forming of the BaTi2Fe4O11 hexagonal phase. TEM and SEM images demonstrated that the coating of BaTi0.7Fe0.3O3 has been successfully controlled with exquisite nano-oval NiFe2O4 shapes. The NFO shielding can significantly promote the thermal stability and the relative permittivity of BFT@NFO pero-magnetic nanocomposites and lowers the Curie temperature. Thermogravimetric and optical analysis were used to test the thermal stability and estimate the effective optical parameters. Magnetic studies showed a decrease in saturation magnetization of NiFe2O4 NPs compared to their bulk system, which is attributed to surface spin disorder. Herein, characterization and the sensitive electrochemical sensor were constructed for the evaluation of peroxide oxidation detection using the chemically adjusted nano-ovals barium titanate-iron@nickel ferrite nanocomposites. Finally, The BFT@NFO exhibited excellent electrochemical properties which can be ascribed to this compound possessing two electrochemical active components and/or the nano-ovals structure of the particles which can further improve the electrochemistry through the possible oxidation states and the synergistic effect. The result advocates that when the BTF is shielded with NFO nanoparticles the thermal, dielectric, and electrochemical properties of nano-oval BaTi0.7Fe0.3O3@NiFe2O4 nanocomposites can be synchronously developed. Thus, the production of ultrasensitive electrochemical nano-systems for the determination of hydrogen peroxide is of extensive significance.

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Room-temperature multiferroicity and magnetoelectric couplings in (Co0.75Al0.25)2(Fe0.75Mg0.25)O4 spinel films

Cited by 7 publications

References 58 publications

Dynamic Magnetoelectric Effect of Soft Layered Composites with a Magnetic Elastomer

Dynamic Magnetoelectric Effect of Soft Layered Composites with a Magnetic Elastomer

Advancements in multiferroic, dielectric, and impedance properties of copper–yttrium co-doped cobalt ferrite for hydroelectric cell applications

Construction and characterization of nano-oval BaTi0.7Fe0.3O3@NiFe2O4 nanocomposites as an effective platform for the determination of H2O2

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