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Multi-susceptibile single-phased ceramics with both considerable magnetic and dielectric properties by selectively doping.

Liu C, Zhang Y, Jia J, Sui Q, Ma N, Du P - Sci Rep (2015)

Bottom Line: Multiferroic ceramics with extraordinary susceptibilities coexisting are vitally important for the multi-functionality and integration of electronic devices.However, multiferroic composites, as the most potential candidates, will introduce inevitable interface deficiencies and thus dielectric loss from dissimilar phases.This study provides a convenient method to attain practicable materials with both outstanding magnetic and dielectric properties, which may be of interest to integration and multi-functionality of electronic devices.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P.R. China.

ABSTRACT
Multiferroic ceramics with extraordinary susceptibilities coexisting are vitally important for the multi-functionality and integration of electronic devices. However, multiferroic composites, as the most potential candidates, will introduce inevitable interface deficiencies and thus dielectric loss from dissimilar phases. In this study, single-phased ferrite ceramics with considerable magnetic and dielectric performances appearing simultaneously were fabricated by doping target ions in higher valence than that of Fe(3+), such as Ti(4+), Nb(5+) and Zr(4+), into BaFe12O19. In terms of charge balance, Fe(3+)/Fe(2+) pair dipoles are produced through the substitution of Fe(3+) by high-valenced ions. The electron hopping between Fe(3+) and Fe(2+) ions results in colossal permittivity. Whilst the single-phased ceramics doped by target ions exhibit low dielectric loss naturally due to the diminishment of interfacial polarization and still maintain typical magnetic properties. This study provides a convenient method to attain practicable materials with both outstanding magnetic and dielectric properties, which may be of interest to integration and multi-functionality of electronic devices.

No MeSH data available.


Hysteresis loops of the BaFe12-xTixO19 (x = 0, 0.4, 0.6 and 0.8) sintered at 1200°C for 3 h.
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f5: Hysteresis loops of the BaFe12-xTixO19 (x = 0, 0.4, 0.6 and 0.8) sintered at 1200°C for 3 h.

Mentions: Fig. 5 displays hysteresis loops of the BaFe12-xTixO19 ferrites (x = 0, 0.4, 0.6 and 0.8). The data of coercive force (Hc), anisotropic field (Ha), saturation magnetization (Ms) and residual magnetization (Mr) deduced from Fig. 5 are summarized in Table 2. It is seen that the maximum Hc, Ha, Ms, Mr and area of hysteresis loop appear in BaFe12O19 and they tend to decrease gradually with increasing Ti4+ content. Ms and Ha of all the ferrits are obtained through the law of approach to saturation (LAS), which can be expressed as Eq. (2)16:where A is the inhomogeneity parameter, B is the anisotropy parameter and χp is the high-field differential susceptibility. B of hexagonal symmetry can be expressed as Eq. (3).


Multi-susceptibile single-phased ceramics with both considerable magnetic and dielectric properties by selectively doping.

Liu C, Zhang Y, Jia J, Sui Q, Ma N, Du P - Sci Rep (2015)

Hysteresis loops of the BaFe12-xTixO19 (x = 0, 0.4, 0.6 and 0.8) sintered at 1200°C for 3 h.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4383142&req=5

f5: Hysteresis loops of the BaFe12-xTixO19 (x = 0, 0.4, 0.6 and 0.8) sintered at 1200°C for 3 h.
Mentions: Fig. 5 displays hysteresis loops of the BaFe12-xTixO19 ferrites (x = 0, 0.4, 0.6 and 0.8). The data of coercive force (Hc), anisotropic field (Ha), saturation magnetization (Ms) and residual magnetization (Mr) deduced from Fig. 5 are summarized in Table 2. It is seen that the maximum Hc, Ha, Ms, Mr and area of hysteresis loop appear in BaFe12O19 and they tend to decrease gradually with increasing Ti4+ content. Ms and Ha of all the ferrits are obtained through the law of approach to saturation (LAS), which can be expressed as Eq. (2)16:where A is the inhomogeneity parameter, B is the anisotropy parameter and χp is the high-field differential susceptibility. B of hexagonal symmetry can be expressed as Eq. (3).

Bottom Line: Multiferroic ceramics with extraordinary susceptibilities coexisting are vitally important for the multi-functionality and integration of electronic devices.However, multiferroic composites, as the most potential candidates, will introduce inevitable interface deficiencies and thus dielectric loss from dissimilar phases.This study provides a convenient method to attain practicable materials with both outstanding magnetic and dielectric properties, which may be of interest to integration and multi-functionality of electronic devices.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P.R. China.

ABSTRACT
Multiferroic ceramics with extraordinary susceptibilities coexisting are vitally important for the multi-functionality and integration of electronic devices. However, multiferroic composites, as the most potential candidates, will introduce inevitable interface deficiencies and thus dielectric loss from dissimilar phases. In this study, single-phased ferrite ceramics with considerable magnetic and dielectric performances appearing simultaneously were fabricated by doping target ions in higher valence than that of Fe(3+), such as Ti(4+), Nb(5+) and Zr(4+), into BaFe12O19. In terms of charge balance, Fe(3+)/Fe(2+) pair dipoles are produced through the substitution of Fe(3+) by high-valenced ions. The electron hopping between Fe(3+) and Fe(2+) ions results in colossal permittivity. Whilst the single-phased ceramics doped by target ions exhibit low dielectric loss naturally due to the diminishment of interfacial polarization and still maintain typical magnetic properties. This study provides a convenient method to attain practicable materials with both outstanding magnetic and dielectric properties, which may be of interest to integration and multi-functionality of electronic devices.

No MeSH data available.