Enhanced magnetodielectric effect and optical property of lead-free multiferroic (1 − x)(Bi0.5Na0.5)TiO3/xCoFe2O4 composites

Rani, Jyoti; Yadav, K. L.; Prakash, S.

doi:10.1016/j.matchemphys.2014.07.002

Cited by 39 publications

(12 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(r≥0.99), the value of the magnetodielectric interaction coefficient-γ (slope of (ε(H)ε(0))/ε(0) vs M 2 plots) of the composite samples decreasing from ≈0.015 emu -2 g 2 to 6x10 -4 emu -2 g 2 with increasing CFO content from 3 to 20 wt.%, revealing a lower coupling with increasing filler content. Such decrease in the value of γ with increasing ferrite content has already been reported in other CFO based MD composites [38] and can be related with the increase of dielectric losses and the deterioration of mechanical connectivity with increasing ferrite content due to increasing filler agglomerates.…”

Section: Magnetodielectric Responsesupporting

confidence: 72%

Improved magnetodielectric coefficient on polymer based composites through enhanced indirect magnetoelectric coupling

Martins

Silva

et al. 2016

Applied Physics Letters

View full text Add to dashboard Cite

The dielectric constant, dielectric loss and saturation magnetization of the polymer composite films increase with increasing CoFe2O4 (CFO) content, being 13, 0.13 and 13 emu.g-1 respectively, for x=20. The magnetodielectric (MD) coupling also depend on the CFO content, the change in the dielectric response (MDE(%)) being the highest for the x=20 sample (4.2%). On the other hand, the highest value of the MD coefficient (γ) is higher on the x=3 sample (0.015 emu-2 g 2). Those values are favourably compared with the ones found in the ceramicbased MD materials, being the highest reported for polymer composites. 2 These facts, together with the flexibility and scalable production of the composites, leads to their large application potential in areas such as filters, magnetic field sensors and actuators, among others.

show abstract

Section: Magnetodielectric Responsesupporting

confidence: 72%

Improved magnetodielectric coefficient on polymer based composites through enhanced indirect magnetoelectric coupling

Martins

Silva

et al. 2016

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…It was evident from Table 3 and Figure 13e that the μ B increased with increasing CF and reached a maximum value of 0.0264 for the HAP + 3 vol% CF ceramic. This improvement also agreed with the previous experiment because of the increase in the magnetic phase concentration (Bammannavar et al, 2009a; Bammannavar & Naik, 2009b; Rani et al, 2014a; Rani et al, 2014b). A similar magnetic enhancement was also observed in the HAP‐BF system, which was synthesized by Jarupoom et al They reported that the BF additive improved the magnetic properties of the HAP ceramic.…”

Section: Resultssupporting

confidence: 92%

“…Typically, the hysteresis curve will be recorded and from there, the magnetic properties of the sample can be deduced. The magnetic moment of the ceramics in terms of Bohr magneton ( μ B ) was calculated via the relation (Bammannavar et al, 2009, Bammannavar & Naik, 2009; Rani et al, 2014a, Rani et al, 2014b):

μ_{B} = (M \times σ_{s}^{'}) / 5585

where M is the molecular weight for the particular composition, 5585 is the magnetic fraction constant, and

σ_{s}^{'}

is the magnetization per gram mol of the sample.…”

Section: Methodsmentioning

confidence: 99%

Enhanced magnetic performance and in‐vitro apatite‐forming ability of theCoFe₂O₄doped nano‐hydroxyapatite porous bioceramics

Jaita

Jarupoom

2023

Microscopy Res & Technique

View full text Add to dashboard Cite

In this research, the bioceramics system of nano-hydroxyapatite-cobalt ferrite or Ca 10 (PO4) 6 (OH) 2 /xCoFe 2 O 4 (HAP/xCF), where x = 0-3 vol%, were studied. The effect of CF concentration on phase evolution, physical, microstructure, mechanical, and magnetic properties as well as the in-vitro apatite-forming ability and cell culture analysis of the HAP ceramic was investigated. XRD revealed that all HAP/xCF ceramics showed high purity of hydroxyapatite with calcium and phosphate. However, the peak of the CF phase is noted for the HAP + 3 vol% CF ceramic. The densification and mechanical properties (HV, HK, σ c , and σ f ) decreased with increasing the CF additive, which correlated to all HAP/xCF ceramics exhibited porous structure with increasing the percentage of porosity. The average grain size also increased with increasing the CF content. An improvement of magnetic behavior, which increasing of the M r , H c , and μ B values, was obtained for the higher CF ceramics. In-vitro apatite-forming ability test suggested that the HAP + 3 vol% CF porous ceramic has a good apatite-forming ability. The cell culture analysis indicated that the proliferation of cells was above 97% for the HAP + 3 vol% CF porous ceramic, which means that the prepared ceramic is biocompatible. Based on the obtained results indicated that these ceramics are promising biomedical application candidates. Research HighlightsWe fabricated the HAP/xCF ceramics by a simple solid-state reaction method. The addition of CF into HAP exhibited magnetic improvement and produced the porous ceramic, which caused good apatite-forming ability. The cell culture analysis indicated that the HAP + 3 vol% CF ceramic is biocompatible.

show abstract

“…E g the optical band gap and n a constant associated with different types of electronic transition (n = 1/2, 2, 3/2 or 3 for direct allowed, indirect allowed, direct forbidden and indirect forbidden transitions, respectively) [34]. The direct energy band gap was determined by extrapolating the linear portion of the curve to zero, using n = 1/2, as shown in Fig.…”

Section: Uv-vis and Pl Spectramentioning

confidence: 99%

Investigation of structural and optical spectroscopy of 5 % Pr doped (Bi0.5Na0.5) TiO3 ferroelectric ceramics: site depended study

Selvadurai

Pazhnivelu

Vasanth

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

In this paper we report the structural and optical characterisation of 5 % Pr doped (Bi 0.5 3? Na 0.5 ? ) A Ti B O 3 (BNT) in A and B site of a distorted perovskite structure. The samples of pure and doped BNT were synthesized successfully by conventional solid state sintering method. The samples were sintered at 1100°C for 3 h. The sintered samples are subjected to structural and optical spectroscopy analysis such as Raman, Fourier Transform Infra red (FTIR) and Photoluminescence (PL). The XRD analysis show Pr doping of 5 % causes change in the lattice parameter and a significant change in the structure. In conjunction to XRD, Raman result shows a local structure distortion, in the region of 200-600 cm -1 , which confirms the formation of cluster type phase on Pr doping in both A and B site. Also, the degree of distortion in the structure is significantly high in the case of B site doping. This is confirmed in both XRD and Raman spectra. The UV-Vis spectra shows that Pr doping causes a red shift in the BNT band gap energy due to local distortion in A and B site doping. The PL emission observed at the excitation of 360 nm shows an intense red band on A site Pr doping, were the emission intensity decreases on B site doping. The observed results are discussed and reported.Electronic supplementary material The online version of this article (

show abstract

Enhanced magnetodielectric effect and optical property of lead-free multiferroic (1 − x)(Bi0.5Na0.5)TiO3/xCoFe2O4 composites

Cited by 39 publications

References 43 publications

Improved magnetodielectric coefficient on polymer based composites through enhanced indirect magnetoelectric coupling

Improved magnetodielectric coefficient on polymer based composites through enhanced indirect magnetoelectric coupling

Enhanced magnetic performance and in‐vitro apatite‐forming ability of theCoFe₂O₄doped nano‐hydroxyapatite porous bioceramics

Investigation of structural and optical spectroscopy of 5 % Pr doped (Bi0.5Na0.5) TiO3 ferroelectric ceramics: site depended study

Contact Info

Product

Resources

About

Enhanced magnetodielectric effect and optical property of lead-free multiferroic (1 − x)(Bi0.5Na0.5)TiO3/xCoFe2O4 composites

Cited by 39 publications

References 43 publications

Improved magnetodielectric coefficient on polymer based composites through enhanced indirect magnetoelectric coupling

Improved magnetodielectric coefficient on polymer based composites through enhanced indirect magnetoelectric coupling

Enhanced magnetic performance and in‐vitro apatite‐forming ability of theCoFe2O4doped nano‐hydroxyapatite porous bioceramics

Investigation of structural and optical spectroscopy of 5 % Pr doped (Bi0.5Na0.5) TiO3 ferroelectric ceramics: site depended study

Contact Info

Product

Resources

About

Enhanced magnetic performance and in‐vitro apatite‐forming ability of theCoFe₂O₄doped nano‐hydroxyapatite porous bioceramics