Dielectric, ferroelectric and magnetic properties of Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 ceramics prepared at different sintering conditions

Li, Zhengxin; Wang, Zhenhua; Gao, Rongli; Cai, Wei; Chen, Gang; Deng, Xiaoling; Fu, Chunlin

doi:10.2298/pac1804394l

Cited by 11 publications

(5 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As an exceptional case, BiFeO 3 (BFO) is a typical single phase multiferroic material with high Curie temperature (T C ∼ 1100 K) and Neel temperature (T N ∼ 640 K) [7][8][9]. In addition, the remnant polarization (P r ∼ 100 µC/cm 2 ) of BFO is high and the band gap (E g ∼ 2.7 eV) is lower than that for many other ferroelectric materials causing that BFO attracted extensive attention worldwide because of its excellent properties and therefore potential applications [10,11].…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the dielectric and multiferroic properties of Co0.5Zn0.5Fe2O4/Ba0.8Sr0.2TiO3 composite ceramics

Qin

et al. 2019

PAC

Self Cite

View full text Add to dashboard Cite

Co 0.5 Zn 0.5 Fe 2 O 4 /Ba 0.8 Sr 0.2 TiO 3 (CZFO/BST) composite ceramics with different molar ratios (1:3, 1:2, 1:1, 2:1 and 3:1) were prepared by combining chemical co-precipitation and sol-gel method. Effects of molar ratio on the microstructure, dielectric and multiferroic properties were investigated. The formation of the individual phases and the composites was confirmed by XRD results and small amount of secondary phase (Ba 2 Fe 2 Ti 4 O 13 ) was observed. The grain sizes of magnetic (CZFO) and ferroelectric phase (BST), measured by SEM, were about 5 µm and 0.5 µm, respectively. The sample with molar ratio (1:2) has the largest dielectric constant, while the sample with molar ratio (3:1) shows the lowest dielectric constant. A distinct loss peak can be observed for all the samples. Both the peak position and peak intensity increase with the frequency, indicating relaxation polarization process generated by space charge or interface polarization. The ceramics with molar ratio (1:1) shows the smallest leakage current (∼ 10 −7 A/cm at 1.5 kV/cm), while the leakage current (∼ 10 −5 A/cm at 1.5 kV/cm) of the sample with molar ratio (3:1) is the largest. The ferroelectric hysteresis loop is not apparent due to the low Curie temperature of the ferroelectric phase, but the sample with molar ratio (2:1) shows the best ferroelectric properties. It was found that with the increase of CZFO content, the values of saturation (M s ) and remnant (M r ) magnetization increase at first and then decrease. The sample with molar ratio (3:1) has the maximum M s value (about 50.34 emu/g), while the sample with molar ratio (1:2) shows the minimal M r value (about 0.46 emu/g). This anomalous magnetic property is induced by the interface interaction between the two phases. (Wei Cai) sult, these materials have fascinated many researchers for their ability to perform different functions simultaneously. They are promising candidates for potential use in many new-type and multi-functional devices, such as spintronic devices, transducer, storage, capacitor etc. [4][5][6]. In recent years, in order to develop materials with new multi-functionality, multiferroics exerts a tremendous fascination of researchers. Although the ME coupling effect has been reported in single phase materials for many years, it is usually very weak at room temperature, limiting their practical applications. In general, this weak ME effect is result of the low Curie temperature (T C ) of the single phase multiferroic materials. The Curie temperatures of most single phase multiferroic materials are far below room temperature, thus the

show abstract

Section: Introductionmentioning

confidence: 99%

A comparative study on the dielectric and multiferroic properties of Co0.5Zn0.5Fe2O4/Ba0.8Sr0.2TiO3 composite ceramics

Qin

et al. 2019

PAC

Self Cite

View full text Add to dashboard Cite

show abstract

“…Theoretically, single doping or co-doping can suppress the oxygen vacancy, reduce the leakage current and obtain excellent ferroelectric properties, thereby improving the multiferroicity of BFO. It has been reported [7,[10][11][12][13][14][15] that doping A site with highly stabile rare earth elements (La, Sm, Ce, etc.) can inhibit the volatilization of Bi 3+ , reduce the oxygen vacancy and ultimately improve the ferroelectricity of BFO.…”

Section: Introductionmentioning

confidence: 99%

“…So far, many studies have been carried out on singledoped or co-doped BFO systems, and the multiferroic properties have indeed been improved to some extent [15][16][17][18][19][20][21][22]. However, in those studies either the replacement percentage is low, or only two elements are selected to replace Fe or/and Bi.…”

Section: Introductionmentioning

confidence: 99%

Effect of sintering temperatures on the magnetoelectric properties of Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 ceramics

Hong

et al. 2022

PAC

Self Cite

View full text Add to dashboard Cite

Multiferroic materials attracted much attention because of magnetoelectric (ME) coupling effect. Herein, a typical single-phase multiferroic BiFeO3 (BFO) was co-doped at A and B sites by solid-state method, and Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 (BLSFTO) ceramics were prepared at different sintering temperatures (940, 960, 980 and, 1000?C). The effects of sintering temperature on the microstructure, morphology, dielectric, ferroelectric and magnetic properties were systematically studied. The remanent polarization (Pr) and coercive field (Ec) of the BLSFTO ceramics show a non-linear change with sintering temperature. The remanent polarization reaches maximum (0.0560 ?C/cm2) in the sample sintered at 1000?C, whereas the maximum Ec of 1.32 kV/cm was obtained in the specimen sintered at 940?C. The remanent magnetization (Mr) increases with the increase of sintering temperature, while change of the saturation magnetization with sintering temperature is negligible. When BLSFTO specimen is sintered at 1000?C, Mr reaches the maximal value of 0.1344 emu/g.

show abstract

“…The Curie temperature of most single-phase multiferroic materials is lower than room temperature, limiting their practical applications. A typical room temperature single phase multiferroic material is BiFeO 3 , which is one of the most studied lead-free multiferroic materials due to its high ferroelectric (T C ∼ 1103 K), antiferromagnetic (T N = 643 K) transition temperatures and large ferroelectric polarization of 100 µC/cm 2 in thin films [11][12][13]. However, the coupling effect of BiFeO 3 at bulk scale is usually very low mostly due to its poor spontaneous polarization, weak ferromagnetism (antiferromagnetic) and high leakage current density.…”

Section: Introductionmentioning

confidence: 99%

Structure, dielectric, magnetic and magnetoelectric coupling properties of xPbTiO3/(1-x)NiFe2O4 composite ceramics

Zeng¹,

Xu²,

Cheng³

et al. 2020

PAC

Self Cite

View full text Add to dashboard Cite

In this paper, xPbTiO 3 /(1-x)NiFe 2 O 4 (PTO/NFO, x = 0.1, 0.2, 0.3, 0.4 and 0.5) ceramic composites were prepared by mixing of sol-gel synthesized PTO and NFO powders, followed by their uniaxial pressing and sintering at 1150°C. The effects of PTO/NFO composition on crystal structure, surface morphology, electrical, magnetic and magnetoelectric coupling properties were studied. XRD results showed that the prepared ceramics contain only PTO and NFO phases without any impurity phase. The samples were relatively dense while the grains were evenly distributed. The dielectric constant and loss varied monotonically with the frequency for different molar ratios. The hysteresis loop of the composites with high amount of high resistance NFO phase (x = 0.1, 0.2) has the shape characteristic for a material with large leakage current. The samples with x = 0.1 showed the largest saturated magnetization, while the sample with x = 0.2 had the maximum remnant magnetization. It was also shown that the polarization was affected by the external magnetic field of 1 mT and the strongest ME coupling (relative polarization change of 15.4%) was observed for the 0.5PbTiO 3 /0.5NiFe 2 O 4 composite. In addition, the relevant calculation showed that the leakage mechanism may not be the main factor affecting the polarization of the obtained ceramics.

show abstract

Dielectric, ferroelectric and magnetic properties of Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 ceramics prepared at different sintering conditions

Cited by 11 publications

References 37 publications

A comparative study on the dielectric and multiferroic properties of Co0.5Zn0.5Fe2O4/Ba0.8Sr0.2TiO3 composite ceramics

A comparative study on the dielectric and multiferroic properties of Co0.5Zn0.5Fe2O4/Ba0.8Sr0.2TiO3 composite ceramics

Effect of sintering temperatures on the magnetoelectric properties of Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 ceramics

Structure, dielectric, magnetic and magnetoelectric coupling properties of xPbTiO3/(1-x)NiFe2O4 composite ceramics

Contact Info

Product

Resources

About