Structural, electrical, magnetic and magnetoelectric properties of Fe doped BaTiO3 ceramics

Rani, Alka; Kolte, Jayant; Vadla, Samba Siva; Gopalan, P.

doi:10.1016/j.ceramint.2016.01.205

Cited by 78 publications

(36 citation statements)

References 34 publications

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“…From Table 1 we can see that, the calculated values of kU are in line with the observed parameter Ps in experiment [25][26][27][28]. In this sense, Ps can be acquired by directly from equation of S P k U   .…”

Section: Modeling and Simulation Of The Hysteresis Loopsupporting

confidence: 69%

“…Thus, equation (6) has been used to fit the observed hysteresis loops from experimental in BFO(Bi0.875Sm0.125FeO3) [25], NBT(Na0.5Bi0.5TiO3) [26], BTO(BaTiO3) [27] and PZT [28]. If we define the negative coercive field location as the left side of a hysteresis loop, and the positive coercive field location as the right side of a hysteresis loop, the hysteresis loop can be divided into left and right branches.…”

Section: Modeling and Simulation Of The Hysteresis Loopmentioning

confidence: 99%

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Modeling of hysteresis loop and its applications in ferroelectric materials

Zhi

Chen

et al. 2018

Ceramics International

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Abstract. In order to understand the physical hysteresis loops clearly, we constructed a novel model, which is combined with the electric field, the temperature, and the stress as one synthetically parameter. This model revealed the shape of hysteresis loop was determined by few variables in ferroelectric materials: the saturation of polarization, the coercive field, the electric susceptibility and the equivalent field.Comparison with experimental results revealed the model can retrace polarization versus electric field and temperature. As a applications of this model, the calculate formula of energy storage efficiency, the electrocaloric effect, and the P(E,T) function have also been included in this article.

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Section: Modeling and Simulation Of The Hysteresis Loopsupporting

confidence: 69%

Section: Modeling and Simulation Of The Hysteresis Loopmentioning

confidence: 99%

Modeling of hysteresis loop and its applications in ferroelectric materials

Zhi

Chen

et al. 2018

Ceramics International

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“…The presence of oxygen vacancies due to charge neutrality requirement may also result in lattice expansion as observed in several CoO‐doped systems . In case of Fe 2 O 3 doping, the larger ionic radius of Fe 3+ (0.645 Å) compared to that of Ti 4+ (0.605 Å) should result in an expansion of the unit cell volume which was observed for the BCZT‐0.01Fe ceramic. However, for the BCZT‐0.03Fe sample, the unit cell slightly contracted .…”

Section: Resultsmentioning

confidence: 83%

Ferroelectric, Piezoelectric and Dielectric Behaviors of CoO‐ and Fe₂O₃‐Doped BCZT Ceramics

Jaimeewong

Sittinon

Buntham

et al. 2018

Physica Status Solidi (a)

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This study investigates the effect of CoO and Fe2O3 dopant on phase, microstructure and ferroelectric properties of BCZT ceramics with the formula of Ba0.85Ca0.15Zr0.1(Ti1‐xCox)0.9O3 and Ba0.85Ca0.15Zr0.1(Ti1‐xFex)0.9O3 where x = 0, 0.01, and 0.03. The XRD patterns presented that the pure perovskite phases are observed regardless of the amount of CoO and Fe2O3 added. Rietveld analysis shows that the tetragonal phase is observed in all patterns and the unit cell volume slightly expanded by the CoO addition while it is distorted with increasing Fe2O3 addition. The average grain sizes decreased upon CoO and Fe2O3 addition. It is found that the doping of CoO and Fe2O3 caused the transition temperature to shift to lower temperature. The optimum ferroelectric and dielectric properties can be achieved for the BCZT‐0.01Co ceramics. This study shows that while small doping with Co and Fe can enhance different properties of BCZT with lower processing temperature, the properties should be further optimized by chemical modification.

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“…At high doping levels, between 20 and 70% (molar fraction), the phase structure of Fe-doped BaTiO 3 ceramics is hexagonal when it is prepared by solid-state sintering at 1200 or 1300 • C [1,2,4]. For low doping levels, the room-temperature structure of Fe-doped BaTiO 3 may be tetragonal (when the iron concentration is ≈ 1 mol% [5]), mixed tetragonal and hexagonal (for doping levels from 2 to 10 mol% [6,7], or 7-12 mol% [8]) or tetragonalpseudocubic when the Fe content is 3 mol% (prepared from commercial BaTiO 3 nanoparticles and iron particles smaller than 1 µm [9]).…”

Section: Introductionmentioning

confidence: 99%

Mössbauer Spectroscopy Studies of Fe-Doped BaTiO₃ Ceramics

et al. 2018

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The Fe-doped BaTiO3 ceramics with various iron concentration were prepared by the conventional ceramic technology. Structure of the samples was studied by X-ray diffraction, scanning electron microscopy and energydispersive X-ray spectroscopy. Hyperfine interactions were determined using the Mössbauer spectroscopy. As confirmed by structural investigations, the obtained materials are good quality ceramics, homogeneous and free of iron oxides and Fe dopant clustering. It was found that Fe ions are incorporated into the tetragonal lattice of barium titanate, which is accompanied by the formation of oxygen vacancies. Paramagnetic behavior of Fe-doped BaTiO3 was observed in the Mössbauer spectra at room temperature as a superposition of singlet and two doublets. These components originate from Fe 3+ ions which substitute Ti 4+ ions at octahedral sites inside of less or more distorted oxygen octahedrons and at pentahedral sites, i.e., inside octahedrons with no one oxygen ion.

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Structural, electrical, magnetic and magnetoelectric properties of Fe doped BaTiO3 ceramics

Cited by 78 publications

References 34 publications

Modeling of hysteresis loop and its applications in ferroelectric materials

Modeling of hysteresis loop and its applications in ferroelectric materials

Ferroelectric, Piezoelectric and Dielectric Behaviors of CoO‐ and Fe₂O₃‐Doped BCZT Ceramics

Mössbauer Spectroscopy Studies of Fe-Doped BaTiO₃ Ceramics

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Structural, electrical, magnetic and magnetoelectric properties of Fe doped BaTiO3 ceramics

Cited by 78 publications

References 34 publications

Modeling of hysteresis loop and its applications in ferroelectric materials

Modeling of hysteresis loop and its applications in ferroelectric materials

Ferroelectric, Piezoelectric and Dielectric Behaviors of CoO‐ and Fe2O3‐Doped BCZT Ceramics

Mössbauer Spectroscopy Studies of Fe-Doped BaTiO3 Ceramics

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Ferroelectric, Piezoelectric and Dielectric Behaviors of CoO‐ and Fe₂O₃‐Doped BCZT Ceramics

Mössbauer Spectroscopy Studies of Fe-Doped BaTiO₃ Ceramics