Frequency-dependent magnetoelectricity of CoFe2O4-BaTiO3 particulate composites

Khamkongkaeo, Atchara; Jantaratana, Pongsakorn; Sirisathitkul, Chitnarong; Yamwong, Teerapon; Maensiri, Santi

doi:10.1016/s1003-6326(11)61033-9

Cited by 27 publications

(7 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the electro-magneto-coupling between CFO nanoparticles and the polar domains in BCT is increased. Consequently, the ordering of ferroelectric phase of BCT could be weakened [39]. Such effect of CFO on the ferroelectric properties of BCT is well demonstrated by the ferroelectric P-E loop results (Table 1), as shown in Fig.…”

Section: Resultsmentioning

confidence: 57%

Magnetic-field-induced dielectric behaviors and magneto-electrical coupling of multiferroic compounds containing cobalt ferrite/barium calcium titanate composite fibers

Zhang

Cheng

Chai

et al. 2018

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Multiferroics have broad application prospects in various fields such as multi-layer ceramic capacitors and multifunctional devices owing to their high dielectric constants and coupled magnetic and ferroelectric properties at room temperature. In this study, cobalt ferrite (CFO)/barium calcium titanate (BCT) composite fibers are prepared from BCT and CFO sols by an electrospinning method, and are then oriented by magnetic fields and sintered at high temperatures. The effects of magnetic fields and CFO contents on the nanostructures and magnetoelectric properties of the composites are investigated. Strong coupling between magnetic and ferroelectric properties occurs in CFO/BCT composites with magnetic orientation. More interestingly, the dielectric constants of CFO/BCT composites with magnetic orientation are found to be enhanced (by ∼1.5–3.5 times) as compared with those of BCT and CFO/BCT without magnetic orientation. The boost of dielectric constants of magnetic-field orientated CFO/BCT is attributed to the magneto-electrical coupling between CFO and BCT, where the polar domains of BCT are pinned by the orientated CFO. Therefore, this work not only provides a novel and effective approach in enhancing the dielectric constants of ceramic ferroelectrics, which is of tremendous value for industrial applications, but also elucidates the interaction mechanisms between ferromagnetic phase and ferroelectric phase in multiferroic compounds.

show abstract

Section: Resultsmentioning

confidence: 57%

Magnetic-field-induced dielectric behaviors and magneto-electrical coupling of multiferroic compounds containing cobalt ferrite/barium calcium titanate composite fibers

Zhang

Cheng

Chai

et al. 2018

Journal of Alloys and Compounds

View full text Add to dashboard Cite

show abstract

“…In addition to these primary phases, minute amount of barium hexa-ferrite 11,29 (BaFe 12 O 19 ) was also observed in all composites, due to diffusion of Fe 2+ or Fe 3+ ions in to Ti 3+ site. 30 It was also observed that the peak intensity of ferrite phase increases with increase in ferrite percentage in all composite systems. 31 The crystallite size of BT phase was found to be comparatively larger in size than the crystallite size of ferrite in the BT : ferrite composite systems.…”

Section: Resultsmentioning

confidence: 77%

Enhanced magneto-capacitance response in BaTiO₃–ferrite composite systems

2015

View full text Add to dashboard Cite

show abstract

“…With increasing BCZT content of the composite the magnetic interaction between the CFO grains decreases and the pinning of the CFO domain wall increases resulting in an increase in the coercive field with decrease in CFO content. 35,36…”

Section: Resultsmentioning

confidence: 99%

“…FESEM micrographs of the composites distinctly show the presence of two phases, whereas CFO grains are well faceted and larger in size, no faceting is observed in BCZT grains (spherical in shape) and they are hardly densified. 35,36 Composite containing ferrite phases generally shows agglomeration of the ferrite phases in the matrix due to its magnetic nature.…”

Section: Phase Analysis Of the Sintered Compositesmentioning

confidence: 99%

Synthesis, characterization, and magneto‐electric properties of (1−x)BCZT‐xCFO ceramic particulate composites

Praveen

Reddy

Kolte

et al. 2016

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Synthesis of a new magnetoelectric [(1−x)(Ba0.85Ca0.15)(Zr0.1Ti0.9)O3‐xCoFe2O4] (weight fraction x=0, 0.1, 0.2, 0.3, 0.4, 0.5 and 1) ceramic particulate composites with its structural characterization and magneto‐electric properties have been reported here in this study. Lead free piezoelectric (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT) and ferrimagnetic CoFe2O4 (CFO) were synthesized using sol‐gel and combustion methods respectively. (1−x)BCZT‐xCFO magnetoelectric composites were then synthesized by mixing of the calcined individual ferroic phases with required weight fractions. Powder X‐ray diffraction studies indicate the coexistence of BCZT and CFO phases in the composites sintered at 1300°C. 0.5BCZT‐0.5CFO composite showed high strain sensitivity (dλ/dH) of 52×10−9 Oe−1, which is comparable to that of pure CFO (50×10−9 Oe−1). A high piezoelectric voltage constant (g33) of 8×10−3 V m/N was measured for 0.8BCZT‐0.2CFO sample. All the composites showed magnetoelectric effect and a high magnetoelectric coupling coefficient (αME) of 6.85 mV/cm Oe was measured for 0.5BCZT‐0.5CFO composite at 1 kHz and a large ME coefficient of 115 mV/cm Oe at its resonance frequency. The effect of microstructure on the magnetoelectric properties of [(1−x)BCZT‐(x)CFO] composites has been studied and reported here as a function of its piezoelectric (BCZT)/ferrite (CoFe2O4) content.

show abstract

Frequency-dependent magnetoelectricity of CoFe2O4-BaTiO3 particulate composites

Cited by 27 publications

References 23 publications

Magnetic-field-induced dielectric behaviors and magneto-electrical coupling of multiferroic compounds containing cobalt ferrite/barium calcium titanate composite fibers

Magnetic-field-induced dielectric behaviors and magneto-electrical coupling of multiferroic compounds containing cobalt ferrite/barium calcium titanate composite fibers

Enhanced magneto-capacitance response in BaTiO₃–ferrite composite systems

Synthesis, characterization, and magneto‐electric properties of (1−x)BCZT‐xCFO ceramic particulate composites

Contact Info

Product

Resources

About

Frequency-dependent magnetoelectricity of CoFe2O4-BaTiO3 particulate composites

Cited by 27 publications

References 23 publications

Magnetic-field-induced dielectric behaviors and magneto-electrical coupling of multiferroic compounds containing cobalt ferrite/barium calcium titanate composite fibers

Magnetic-field-induced dielectric behaviors and magneto-electrical coupling of multiferroic compounds containing cobalt ferrite/barium calcium titanate composite fibers

Enhanced magneto-capacitance response in BaTiO3–ferrite composite systems

Synthesis, characterization, and magneto‐electric properties of (1−x)BCZT‐xCFO ceramic particulate composites

Contact Info

Product

Resources

About

Enhanced magneto-capacitance response in BaTiO₃–ferrite composite systems