Structural, magnetic and electronic properties of iron doped barium strontium titanate

Kaur, Anumeet; Singh, Anupinder; Singh, Lakhwant; Mishra, S. K.; Babu, P. D.; Asokan, K.; Kumar, Sanjeev; Chen, C. L.; Yang, Kai-Shiun; Wei, Da‐Hua; Dong, Chung‐Li; Wang, C. H.; Wu, Maw–Kuen

doi:10.1039/c6ra21458d

Cited by 27 publications

(3 citation statements)

References 19 publications

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“…These results are in consistent with result of other researchers. 19,20 The dips, m 3 and m 4 , around 870 cm À1 and 965 cm À1 appear to be more prominent in Gd-doped PLZT samples corresponding to formation of new bonds due to (Gd) dopant 21 All data are shown in Table 2. Figure 3A represents the HR-TEM micrograph for Pb 0.92 La 0.06 Gd 0.02 (Zr 0.52 Ti 0.48 )O 3 with the plane spacing magnified in the inset.…”

Section: Infrared Studiesmentioning

confidence: 99%

Dielectric and piezoelectric performance of gadolinium‐doped lead lanthanum zirconate titanate

Mansour

Eid

El-Latif

et al. 2017

Int J Applied Ceramic Tech

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In this article, polycrystalline samples of Gd3+ ion‐modified lead lanthanum zirconate titanate PLGZT: (Pb0.94‐xGdxLa0.06)(Zr0.52Ti0.48)O3; x = 0, 2, 4, 6, and 8% have been prepared by the sol‐gel autocombustion strategy. The structural properties of the prepared samples were analyzed by X‐ray diffraction profile (XRD), Fourier transform infrared spectra (FT‐IR), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The samples were assigned to pure PZT perovskite tetragonal structure. Ag electrodes were made on both sides of the disks for measurements of electrical and dielectric properties at different temperatures ranging from 30 to 500°C at various frequencies. The maximum dielectric constant, Curie temperature (TC), dielectric loss at TC, and the piezoelectric charge coefficient d33 ranges of the investigated samples were found to be 1850 to 2420, 350 to 399°C, 0.023 to 0.026, and 299 to 532 pC/N, respectively. Higher coefficients were reached for the 4 % Gd substitution. Finally, the obtained results indicate that these materials can be good candidates for ultrasonic transducers.

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Section: Infrared Studiesmentioning

confidence: 99%

Dielectric and piezoelectric performance of gadolinium‐doped lead lanthanum zirconate titanate

Mansour

Eid

El-Latif

et al. 2017

Int J Applied Ceramic Tech

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“…Researchers have experimented with BT and BST in the presence of a variety of dopants, including Bi [25], Ca [26], Dy [27], Er [28], Eu [29], Fe [30], Ho [31], Hf [32], La [33], Nb [34], Rh [35], Sb [36], Sn [37], V [18], Y [38], Zn [39], and Zr [40]. Some existing ceramics have been developed using strontium doped with barium titanate [41][42][43]. Some have been developed using aluminum doped with barium titanate [44].…”

Section: Introductionmentioning

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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“…Barium strontium titanate ((Ba 1-x Sr x ) TiO 3 , BST), as an infinite solid solution of BaTiO 3 and SrTiO 3 , maintains perovskite structure (ABO 3 ) similar to BaTiO 3 , and has outstanding properties such as high dielectric constant, low dielectric loss and excellent ferroelectric properties [1][2]. In addition, its Curie temperature can be adjusted over a wide range of temperature by changing Ba/Sr ratio, making the BST systems become one of the basic ceramic materials for ceramic capacitors [3].…”

Section: Introductionmentioning

confidence: 99%

Dielectric and Ferroelectric Properties of Ho<sub>2</sub>O<sub>3</sub> Doped Barium Strontium Titanate Ceramicsq

Zhang¹

2019

IJMSA

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The crystalline structure, surface morphology, dielectric and ferroelectric properties of 0~10wt% Ho 2 O 3 doped (Ba 0.75 Sr 0.25) TiO 3 ceramics prepared by conventional solid state method were studied using X-ray diffractometer, scanning electron microscopy, LCR measuring system and ferroelectric property test systems aiming for ceramic capacitor applications. It is found that proper amount of Ho 2 O 3 can refine grains of the system. With the increase of Ho 2 O 3 doping content, the average grain size of (Ba 0.75 Sr 0.25) TiO 3 ceramics decreases. When Ho 2 O 3 >8 wt%, (Ba 0.75 Sr 0.25) TiO 3 based ceramic samples are multi-phase compounds with typical perovskite structure accompanied by the appearance of cylindrical grains. The Ho 3+ ions substitute the host A sites and B sites of (Ba 0.75 Sr 0.25) TiO 3 perovskite lattice, resulting in the lattice distortion of the system and the change of the relative dielectric constant and dielectric loss at room temperature. With the increase of Ho 2 O 3 doping content, the relative dielectric constant at room temperature of the system increases first and then decreases. The maximum of relative dielectric constant at room temperature can be found in the 1 wt% Ho 2 O 3 doped (Ba 0.75 Sr 0.25) TiO 3 ceramics. When Ho 2 O 3 ＞1 wt%, the maximum of relative dielectric constant ε rmax decreases and the temperature corresponding to the maximum of relative dielectric constant T m shifts toward lower temperature with the increase of Ho 2 O 3 doping content. The (Ba 0.75 Sr 0.25) TiO 3 ceramics with high Ho 2 O 3 content show relaxor-like behavior which is characterized by the typical diffuse phase transition and frequency dispersion of dielectric constant. However, the (Ba 0.75 Sr 0.25) TiO 3 ceramics with low Ho 2 O 3 content do not exhibit permittivity frequency dispersion. According to the P-E hysteresis loops of Ho 2 O 3 doped (Ba 0.75 Sr 0.25) TiO 3 ceramics, the ferroelectricity was increased and then decreased with the increase of Ho 2 O 3 doping content. With the increase of Ho 2 O 3 doping content, the P-E relationships turn out to be straight lines, implying the paraelectric phase for (Ba 0.75 Sr 0.25) TiO 3 ceramics with high Ho 2 O 3 content.

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Structural, magnetic and electronic properties of iron doped barium strontium titanate

Abstract: Very less known magnetic and the electronic properties of iron doped barium strontium titanate are reported.

Cited by 27 publications

References 19 publications

Dielectric and piezoelectric performance of gadolinium‐doped lead lanthanum zirconate titanate

Dielectric and piezoelectric performance of gadolinium‐doped lead lanthanum zirconate titanate

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

Dielectric and Ferroelectric Properties of Ho<sub>2</sub>O<sub>3</sub> Doped Barium Strontium Titanate Ceramicsq

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Structural, magnetic and electronic properties of iron doped barium strontium titanate

Abstract: Very less known magnetic and the electronic properties of iron doped barium strontium titanate are reported.

Cited by 27 publications

References 19 publications

Dielectric and piezoelectric performance of gadolinium‐doped lead lanthanum zirconate titanate

Dielectric and piezoelectric performance of gadolinium‐doped lead lanthanum zirconate titanate

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

Dielectric and Ferroelectric Properties of Ho&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Doped Barium Strontium Titanate Ceramicsq

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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

Dielectric and Ferroelectric Properties of Ho<sub>2</sub>O<sub>3</sub> Doped Barium Strontium Titanate Ceramicsq