Enhanced multiferroic properties of Co0.5Ni0.5Fe2O4/Ba0.85Sr0.15TiO3 composites based on particle size effect

Gao, Rongli; Zhang, Qingmei; Xu, Zhi; Wang, Zhenhua; Fu, Chunlin; Chen, Gang; Deng, Xiaoling; Xiang-dong, Luo; Qiu, Yang; Cai, Wei

doi:10.1007/s10854-019-01362-5

Cited by 15 publications

(9 citation statements)

References 33 publications

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“…The maximum values of the coefficient for the samples ST-1050, ST-1100, ST-1150 and ST-1200 are 8.04, 9.36, 8.32 and 7.94 mV/cm•Oe, respectively. These vales of ME coefficient are higher than previously reported values for BTO based magnetoelectric composite ceramics [44][45][46], but they are near the values obtained in our previous works [26,32]. From one point of view, the largest ME coefficient of the sample ST-1100 could be due to Figure 7.…”

Section: Magnetic Propertiessupporting

confidence: 63%

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Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

Liu

Gao

2020

PAC

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Magnetoelectric composites have attracted much attention due to their intriguing physical properties and potential applications. They might have strong magnetoelectric coupling effect above room temperature, but it mainly depends on the sintering schedule. In this paper, 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 (NZFO-BSTO) composite ceramics were prepared by conventional solid sintering method. Effects of the sintering temperature (1050, 1100, 1150 and 1200?C) on the microstructure, dielectric and multiferroic properties were investigated in detail. XRD results confirm that the prepared ceramics show bi-phase structure, which can be indexed as NZFO and BSTO. No obvious impurity phase was observed when the sintering temperature is less than 1200?C, indicating that there is no apparent chemical reaction occuring at the magnetic and ferroelectric interface. All of the samples show relatively dense and uniform structure. The mean grain size of the composites increases from 220 to 650 nm when the sintering temperature increases from 1050?C to 1200?C. The sample ST-1100 has the best frequency stability of dielectric constant, while it presents the smallest dielectric loss. All specimens present two dielectric peaks, the first one is attributed to the diffuse phase transition of BSTO, while another one generated at higher temperature corresponds to the relaxation polarization. The sample ST-1100 shows excellent ferroelectric properties, the value of remnant polarization is about 5.1 ?C/cm2 and the coercive electric field value is ~20 kV/cm. The ceramics ST-1050 and ST-1200 show larger leakage current. All samples show paramagnetic behaviour with small remnant magnetization (~0.3 emu/g) and coercive magnetic field (~30Oe). The sample ST-1100 has maximum magnetoelectric coupling coefficient of 9.6mV/cm?Oe when the magnetic field is near 1100Oe.

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Section: Magnetic Propertiessupporting

confidence: 63%

“…[16][17][18][19][20][21][22]. In this direction, various composite materials have been investigated to enhance the ME effect, including Bi 4 [23][24][25][26][27][28][29]. Although many magnetoelectric systems have been investigated there are still some problems that need to be solved in these composites.…”

Section: Introductionmentioning

confidence: 99%

Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

Liu

Gao

2020

PAC

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“…And the polarization is higher than the polarization reported in the CFO-PZT core-shell structure [26]. This is because the enhanced polarization in the core-shell composite can be attributed to the large leakage current density caused by the space charge effect [28,29]. In addition to the sample (1:6), the coercive field of other proportions of ceramics decreases as the FE phase increases.…”

Section: Ferroelectric Propertiesmentioning

confidence: 82%

“…This is due to the fact that the magnetic phase CFO in the composites plays a major magnetic role in the composites because PZT is a nonmagnetic material, and the magnetic properties of the composites should decrease as the PZT concentration increases. The difference is that the coercive force (H c ) of the molar ratio of 1:6 is the largest, one reason is the interface interaction between the two phases [28][29][30], while this statement can't be verified from the XRD and SEM results. Another factor that can influence the coercive field is the grain size and shape.…”

Section: Magnetic Propertiesmentioning

confidence: 97%

A comparative study on the structural, dielectric, ferroelectric and magnetic properties of CoFe₂O₄/PbZr_0.52Ti_0.48O₃ multiferroic composite with different molar ratios

Gao

et al. 2019

J. Phys. Commun.

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Magnetoelectric composites have attracted much attentions due to their excellent multiferroic properties at room temperature. In this paper, CoFe 2 O 4 -PbZr 0.52 Ti 0.48 O 3 (CFO-PZT) composite ceramics with different molar ratios (CFO/PZT=1:4, 1:5, 1:6 and 1:7) were prepared by conventional solid reaction method. Effects of molar ratio on the structure, dielectric, ferroelectric and magnetic properties were comparatively investigated. X-ray diffraction patterns confirmed biphase structures of the composites, which can be indexed as CFO and PZT, no other obvious phase can be found with the limitation of the XRD resolution. Scanning electron microscopy (SEM) images show that the surface of the prepared samples is not dense enough and many pores are formed, the mean grain size is about 200 nm. The same relaxation behavior was observed in the intermediate temperature range of PZT-CFO composite ceramics. At room temperature, the dielectric constant and dielectric loss of the specimen 1:4 are the highest. The leakage current of the sample 1:4 is the lowest while the sample 1:6 has the largest value. As the CFO content in the composite decreases, both the saturation (Ms) and the remnant (Mr) magnetization decrease. Among them, the sample 1:4 presents better ferroelectric and magnetic properties, the remnant polarization is 1.13 μC cm −2 , the saturation magnetization and remnant magnetization are 11.01 and 3.28 emu g −1 , respectively. The sample 1:6 has the largest coercive field (945.27 Oe) while the sample 1:7 show the smallest value (681.19 Oe). Interface interaction between CFO/PZT may be applied to explain this phenomenon.

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“…With the continuous development of information technology, multiferroic materials have a wide range of potential applications in multi-function devices such as transducers, sensors, memories, etc. [5][6][7].…”

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

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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.

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Enhanced multiferroic properties of Co0.5Ni0.5Fe2O4/Ba0.85Sr0.15TiO3 composites based on particle size effect

Cited by 15 publications

References 33 publications

Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

A comparative study on the structural, dielectric, ferroelectric and magnetic properties of CoFe₂O₄/PbZr_0.52Ti_0.48O₃ multiferroic composite with different molar ratios

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

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Enhanced multiferroic properties of Co0.5Ni0.5Fe2O4/Ba0.85Sr0.15TiO3 composites based on particle size effect

Cited by 15 publications

References 33 publications

Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

A comparative study on the structural, dielectric, ferroelectric and magnetic properties of CoFe2O4/PbZr0.52Ti0.48O3 multiferroic composite with different molar ratios

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

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A comparative study on the structural, dielectric, ferroelectric and magnetic properties of CoFe₂O₄/PbZr_0.52Ti_0.48O₃ multiferroic composite with different molar ratios