Synthesis of single phase rhombohedral LaNiO3 at low temperature and its characterization

Biswas, Mridula

doi:10.1016/j.jallcom.2009.02.099

Cited by 17 publications

(8 citation statements)

References 35 publications

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“…However, unfortunately, these materials prefer to undergo centrosymmetric distortions, rather than a polar one. Specifically, at room temperature LaCoO 3 and LaNiO 3 exhibit rhombohedral distortions [47,48], whereas LaFeO 3 is orthorhombic [38]. The importance of competitive distortions in the d 0 rule has already been stressed previously [1].…”

Section: Lasco3mentioning

confidence: 92%

Multiferroic crossover in perovskite oxides

et al. 2016

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Recently, the perovskite BiCoO$_3$ has been shown experimentally to be isostructural with PbTiO$_3$, while simultaneously the $d^6$ Co$^{3+}$ ion has a high spin ground state with $C$-type antiferromagnetic ordering. Using hybrid density functional calculations, we investigate the atomic, electronic and magnetic structure of BiCoO$_3$ to elucidate the origin of the multiferroic state. To begin with, we perform a qualitative trend sudy of the role of $d$ electrons in affecting the tendency for perovskite materials to exhibit a ferroelectric distortion; this work initially explores a qualitative trend study in artificial cubic and tetragonal LaBO$_3$ perovskites. We choose La as the A-cation so as to remove the effects of Bi $6s$ hybridization. Through first-principles calculations of the LaBO$_3$ series, where B is a $d^0 - d^8$ cation from the $3d$-block, the trend study reveals that increasing the $d$ orbital occupation initially removes the tendency for a polar distortion, as expected. However, for high spin $d^5-d^7$ and $d^8$ cations a strong ferroelectric instability is recovered. We explained this effect in terms of the pseudo Jahn-Teller theory for ferroelectricity. It is shown that, in some cases, unpaired electron spins actually drive ferroelectricity, rather than inhibit it, which represents a shift in the understanding of how ferroelectricity and magnetism interact in perovskite oxides. It follows, that for the case of BiCoO$_3$, the Co$^{3+}$ ion plays a major role in the ferroelectric lattice instability. Importantly, the ferroelectric polarization is greatly enhanced when the Co$^{3+}$ ion is in the high spin state, when compared to the nonmagnetic, low spin state, and a large coupling of the electrical and magnetic polarization is present. Importantly, it is demonstrated that the ground spin state is switched by reducing the internal ferroelectric polarization

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Section: Lasco3mentioning

confidence: 92%

Multiferroic crossover in perovskite oxides

et al. 2016

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“…The sample shows a bandgap-narrowing at roughly 2.42 eV, which can effectively absorb visible light. However, the sample LaNiO 3 calcined at 1073 K showed no bandgap, indicating the rhombohedral LaNiO 3 does not display any optical absorption [23]. The energy values of different samples are summarized in Table 1.…”

Section: Tem and Drs Measurementmentioning

confidence: 99%

Effect of H2/CO2 mixture gas treatment temperature on the activity of LaNiO3 catalyst for hydrogen production from formaldehyde aqueous solution under visible light

Jia

Fang

2010

Journal of Alloys and Compounds

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“…In addition, the catalytic activity for oxygen reduction is as high as that of a platinum catalyst [17]. Therefore, LNO perovskites have been investigated as a functional oxide layer in various applications for superior chemical and electrical properties [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Rapid Fabrication of Chemical Solution-Deposited Lanthanum Nickelate Thin Films via Intense Pulsed-Light Process

et al. 2019

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In this paper, we demonstrate the practicality and feasibility of the flash light-sintering method to fabricate the ceramic material perovskite structure for lanthanum nickel oxide (LaNiO3; LNO) thin films using flash light irradiation equipment. LNO thin films are deposited on an Si wafer and Al2O3 substrate via the chemical solution deposition (CSD) method and sintered by a thermal and flash light-irradiation process with a bottom heater. The properties of flash light-sintered LNO thin films are compared with those of thermally sintered films. The surface morphology, crystal development, and electric conductivity of the LNO thin films are measured by field-emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), and a four-point probe, respectively. Flash light sintering was accomplished in milliseconds. Through the comparison of thermal sintering and flash light-sintering results, it was confirmed that perovskite LNO thin films deposited by the CSD method can be fabricated by flash light sintering. We show that the flash light sintering method can solve several inherent issues of the conventional thermal sintering method.

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Synthesis of single phase rhombohedral LaNiO3 at low temperature and its characterization

Cited by 17 publications

References 35 publications

Multiferroic crossover in perovskite oxides

Multiferroic crossover in perovskite oxides

Effect of H2/CO2 mixture gas treatment temperature on the activity of LaNiO3 catalyst for hydrogen production from formaldehyde aqueous solution under visible light

Rapid Fabrication of Chemical Solution-Deposited Lanthanum Nickelate Thin Films via Intense Pulsed-Light Process

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