Weak ferromagnetism and magnetoelectric effect in multiferroic x Ba 0.95 Sr 0.05 TiO 3 –(1− x )BiFe 0.9 Gd 0.1 O 3 relaxors

Miah, M.J.; Khan, M. N. I.; Hossain, A.K.M. Akther

doi:10.1016/j.jmmm.2015.10.083

Cited by 42 publications

(4 citation statements)

References 54 publications

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“…The intergranular porosity is significantly affected by grain size [60]. The porosity in the prepared samples, which may be generated and developed during sintering, exhibited an inverse pattern with bulk density (B), as the presence of pores in these samples may cause variation in bonding among the components of the compositions, resulting in a shift in the interatomic distance, which in turn increased the volume of the unit cell and lowered density [61,62]. 94% and a minimum density of 6.768 g cm −3 .…”

Section: Porositymentioning

confidence: 99%

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Mahmud

Ahamed

Khan

2022

Mater. Res. Express

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In this research, structural, magnetic, electrical, and optical properties of Al3+ substituted Ba0.6Sr0.4Ti1-xAlxO3 ceramics (where x = 0.00 to 0.20) have been investigated and discussed. The ceramic samples have been successfully synthesized by the conventional solid-state reaction method. The crystallinity of the prepared samples has been confirmed by X-ray peak broadening techniques such as the Williamson Hall (W-H) plot technique and the Scherrer method. The lattice constant "a", showing a significant drop as Al concentration increases, varies from 3.9420A to 3.9210A. The FTIR spectrum revealed a prominent peak between 435 cm−1 to 540 cm−1, without showing any secondary phase. Raman spectroscopic analysis showed that the prepared samples are in cubic phase with no phase transition. The shifting of a dominating peak in Raman at 580 cm-1 is due to the development of AlTi defects. VSM analysis at room temperature showed the ferromagnetic characteristics of all the samples. The highest value of the anisotropic constant (Ka~39.933 emu/cm3) has been seen at x=0.10. The real component of initial permeability is almost constant for the frequency range of about 75 MHz, and above this frequency range, it quickly reduces. At the high-frequency range, the prepared samples show an excellent relative quality factor due to the low dielectric loss, notably when x = 0.05. The prepared perovskites exhibited minimum eddy current loss characteristics due to the increment of AC resistivity at x=0.20. UV–visible spectroscopy shows a significant change in the energy bandgap from 3.23 eV to 3.04 eV with the doping concentrations.

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Section: Porositymentioning

confidence: 99%

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Mahmud

Ahamed

Khan

2022

Mater. Res. Express

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“…The value of tan M δ remains constant after 1 MHz for all the cases. tan M δ arises due to the lag of domain wall motion with respect to the applied field and creates imperfections in the crystal lattice [7].…”

Section: Complex Initial Permeabilitymentioning

confidence: 99%

Sintering Temperature Dependent Magnetic and Dielectric Properties of Polycrystalline xBa0.95Sr0.05TiO3-(1 - x)BiFe0.90Gd0.10O3 Ceramics

Miah¹,

Mouri²,

Ahad³

et al. 2020

JAMP

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Polycrystalline xBa 0.95 Sr 0.05 TiO 3 -(1 − x)BiFe 0.90 Gd 0.10 O 3 ceramics were prepared by standard solid state reaction technique using the solid solution of BaCO 3 , SrCO 3 , TiO 2 , Bi 2 O 3 , Fe 2 O 3 and Gd 2 O 3 . The compound is a BiFeO 3 based multiferroic material which contains both magnetic and electric properties. The synthesized ceramics noticed better properties than xBaTiO 3 -(1 − x)BiFeO 3 because of adding rare earth element Gd which have higher magnetic moment than Fe. The prepared samples were sintered at 900˚C, 950˚C and 1000˚C for 1 h. The effect of sintering temperature on density of the compound, complex initial permeability, dielectric properties and complex impedance analysis was reported in this article. Density of the ceramics was found to be enhanced with the rise in sintering temperature which implied porosity of the compound decreased when sintering temperature was increased. Enhanced complex initial permeability was noticed for the samples up to 950˚C and this might be attributed to reducing the motion of domain wall when the ceramics were sintered above 950˚C. Value of dielectric constant increased whereas dielectric loss decreased and these modifications might be expected because of changing density and grain size due to the variation of sintering temperature. Grain resistance (resistance due to grains) was determined from complex impedance analysis and it reduced with the rise in sintering temperature. The studied multiferroic material exhibited weak ferromagnetism but is an alternative product of environmental hazard lead (Pb) based multiferroic material and it is expected to be environment friendly.

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“…Composites like xBa 0.95 Sr 0.05 TiO 3 -(1Àx)BiFe 0.9 Gd 0.1 O 3 , prepared by SSRM, give a ME ¼ 1.67 mV cm À1 Oe À1 . 39 In this group, we also include our 0.5CoFe 2 O 4 -0.5BaTiO 3 reference composite (SSRM) with a ME ¼ 1.1 mV cm À1 Oe À1 and the previously published a ME ¼ 0.52 mV cm À1 Oe À1 about the same composite formed by nanopowders. 40 It is interesting to note how a ME decreases when the grain size is reduced.…”

Section: -5mentioning

confidence: 99%

Ferromagnetic and multiferroic interfaces in granular perovskite composite xLa0.5Sr0.5CoO3-(1−x)BiFeO3

Lohr

López

Saleta

et al. 2016

Journal of Applied Physics

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Nanopowder of ferromagnetic La0.5Sr0.5CoO3 (LSCO) and multiferroic BiFeO3 (BFO) were synthesized by spray pyrolysis method. Different compositions of multiferroic xLSCO-(1−x)BFO composites were synthesized at 800 °C for 2 h. Scanning electron microscopy and energy dispersive spectroscopy elemental mapping were performed to study the morphology of composites. Ferri/ferromagnetic responses above TC (LSCO) are observed, which are associated with the interfaces LSCO/BFO. This interface presents a different behavior compared to the original perovskites, and the magnitude of the magnetization depends on x. Electrical DC conductivity as a function of temperature for LSCO nanopowder (x = 1) presents a different behavior than that reported in bulk material. For x = 1 and 0.9, the model by Glazman and Matveev [Zh. Eksp. Teor. Fiz. 94, 332 (1988)] is proposed to describe the electrical conductivity. On the other hand, x = 0, 0.1, and 0.5 present a variable range hopping behavior. Complex impedance spectroscopy as a function of frequency indicates a pure resistive behavior for x ≥ 0.5 compositions, while a complex resistive-capacitive behavior is observed for low x values (0, 0.1). In these samples, low values of magnetoelectric coupling were measured with an AC lock-in technique.

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Weak ferromagnetism and magnetoelectric effect in multiferroic x Ba 0.95 Sr 0.05 TiO 3 –(1− x )BiFe 0.9 Gd 0.1 O 3 relaxors

Cited by 42 publications

References 54 publications

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Sintering Temperature Dependent Magnetic and Dielectric Properties of Polycrystalline xBa<sub>0.95</sub>Sr<sub>0.05</sub>TiO<sub>3</sub>-(1 - x)BiFe<sub>0.90</sub>Gd<sub>0.10</sub>O<sub>3</sub> Ceramics

Ferromagnetic and multiferroic interfaces in granular perovskite composite xLa0.5Sr0.5CoO3-(1−x)BiFeO3

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Weak ferromagnetism and magnetoelectric effect in multiferroic x Ba 0.95 Sr 0.05 TiO 3 –(1− x )BiFe 0.9 Gd 0.1 O 3 relaxors

Cited by 42 publications

References 54 publications

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba0.6Sr0.4Ti1-xAlxO3 ceramics via Sr and Al Co-doping engineering

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba0.6Sr0.4Ti1-xAlxO3 ceramics via Sr and Al Co-doping engineering

Sintering Temperature Dependent Magnetic and Dielectric Properties of Polycrystalline xBa&lt;sub&gt;0.95&lt;/sub&gt;Sr&lt;sub&gt;0.05&lt;/sub&gt;TiO&lt;sub&gt;3&lt;/sub&gt;-(1 - x)BiFe&lt;sub&gt;0.90&lt;/sub&gt;Gd&lt;sub&gt;0.10&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Ceramics

Ferromagnetic and multiferroic interfaces in granular perovskite composite xLa0.5Sr0.5CoO3-(1−x)BiFeO3

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Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Sintering Temperature Dependent Magnetic and Dielectric Properties of Polycrystalline xBa<sub>0.95</sub>Sr<sub>0.05</sub>TiO<sub>3</sub>-(1 - x)BiFe<sub>0.90</sub>Gd<sub>0.10</sub>O<sub>3</sub> Ceramics