Effect of anionic substitution on the structural and magneto-electrical properties of La–Ca–Mn–O perovskite manganites

Altintas, S.P.; Mahamdioua, N.; Amira, A.; Terzioğlu, C.

doi:10.1016/j.jmmm.2014.05.010

Cited by 10 publications

(4 citation statements)

References 42 publications

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“…In the work of S.P. Altintas et al [19], the authors presented similar, homogeneous elements distribution for LCMO synthesized in the same preparation conditions but higher temperature 1623 K.…”

Section: Resultsmentioning

confidence: 77%

Archives of Metallurgy and Materials

Bara,

Dzik,

Feliksik

et al. 2020

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MnO 3 polycrystalline were synthesized from La 2 O 3 , CaO and MnO 2 powder mixture using a solid state reaction technique. The compound powders were obtained through the free sintering method at different temperatures and sintering times in order to study the influence of technological conditions on Ca doped La manganites. The most important physical features as structure, microstructure and morphology were described after X-ray diffraction investigation. Photographs of the specimen fractures were taken with SEM (scanning electron microscope) and they revealed high porosity of the tested material and great tendency for its grains to create agglomerates. Influence of doping and technological conditions on lattice parameters were studied by means of Rietvield analysis. The XRD measurements reveal that La 0,7 Ca 0,3 MnO 3 has orthorhombic symmetry with Pnma space group.

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Section: Resultsmentioning

confidence: 77%

Archives of Metallurgy and Materials

Bara,

Dzik,

Feliksik

et al. 2020

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“…Recently, there has been growing interest in the study of layered perovskites, which possess a wide variety of interesting properties, including superconductivity, colossal magnetoresistance (CMR) [1,2], ferroelectricity, and catalytic activity [3][4][5][6][7][8][9][10][11][12]. Layered perovskites are intergrowths of perovskite and other structures, and they consist of two dimensional (2D) perovskite slabs interleaved with cations or cationic structural units.…”

Section: Introductionmentioning

confidence: 99%

Structural, Electronic, and Mechanical Properties of A₃Mn₂O₇(A = Sr, Ca): Ab Initio Calculation

et al. 2019

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In the present study, the structural, electronic, optical, and mechanical properties of the Ruddlesden-Popper type oxide compounds are investigated by means of density functional theory. In our calculation, spin polarized electron band structures and density of the state were identified by adding to the spin contribution of the Mn-atom. For A 3 Mn 2 O 7 compounds, the real and imaginary parts of the dielectric function and other optical properties, such as energy loss function, effective number of valence electrons, and effective optical dielectric constant, were calculated accordingly. In addition, the bulk modules, shear modules, Young's modulus and Poisson ratios, anisotropy factors, sound velocities, and Debye temperatures for these compounds were calculated too.

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“…Substitution of a second anion having different size and charge is emerging as another promising route to control perovskite properties. − For example, fluorination of a thin film of SrFeO 3−δ reduced the film’s electrical resistance by 5 orders of magnitude, and fluorination of NdNiO 3 changed it from a metal to a semiconductor with 2.1 eV band gap . In La 0.7 Ca 0.3 MnO 3−δ F x , fluorination to x = 0.6 increased the ferromagnetic Curie temperature from 258 to 269 K, while also raising the metal–insulator transition temperature by 16 K . Substitution with nitride has also been shown to affect the band gap, electric polarity, and photocatalytic properties; however, anion substitution has not yet been used to create a room-temperature multiferroic.…”

Section: Introductionmentioning

confidence: 99%

“…21−23 For example, fluorination of a thin film of SrFeO 3−δ reduced the film's electrical resistance by 5 orders of magnitude, 24 and fluorination of NdNiO 3 changed it from a metal to a semiconductor with 2.1 eV band gap. 25 In La 0.7 Ca 0.3 MnO 3−δ F x , fluorination to x = 0.6 increased the ferromagnetic Curie temperature from 258 to 269 K, while also raising the metal−insulator transition temperature by 16 K. 26 Substitution with nitride has also been shown to affect the band gap, 27 electric polarity, 28 and photocatalytic properties; 29 however, anion substitution has not yet been used to create a room-temperature multiferroic. In this article, we report results from first-principles density functional theory (DFT) calculations showing anion substitution as a means to create Fe-based multiferroics with strong polarization and robust magnetic ordering above room temperature.…”

Section: ■ Introductionmentioning

confidence: 99%

Multiferroism in Iron-Based Oxyfluoride Perovskites

2018

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Multiferroic materials with simultaneous magnetic and ferroelectric ordering that persist above room temperature are rare. Using first-principles density functional theory calculations, we demonstrate fluorination of oxygen-deficient AA'FeO perovskites, where A and A' are cations with +3 and +2 oxidation states, respectively, and have a layered ordering, as an effective strategy to obtain room-temperature multiferroics. We show that by controlling the size of the A and A' cations, it is possible to stabilize a noncentrosymmetric phase arising due to the hybrid improper ferroelectricity mechanism, with polarization as high as 13 μC/cm. The fluorination also stabilizes Fe in +3 oxidation state, which results in superexchange interactions that are strong enough to sustain magnetic order well above room temperature. We also show the presence of a magnetoelectric coupling wherein the switching mode that reverses the direction of the spontaneous polarization also affects the strength of the magnetic interactions. The results show that low-temperature fluorination of anion-deficient perovskites with layered cation ordering can be an effective approach to design new multiferroics.

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Effect of anionic substitution on the structural and magneto-electrical properties of La–Ca–Mn–O perovskite manganites

Cited by 10 publications

References 42 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Structural, Electronic, and Mechanical Properties of A₃Mn₂O₇(A = Sr, Ca): Ab Initio Calculation

Multiferroism in Iron-Based Oxyfluoride Perovskites

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Effect of anionic substitution on the structural and magneto-electrical properties of La–Ca–Mn–O perovskite manganites

Cited by 10 publications

References 42 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Structural, Electronic, and Mechanical Properties of A3Mn2O7(A = Sr, Ca): Ab Initio Calculation

Multiferroism in Iron-Based Oxyfluoride Perovskites

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Structural, Electronic, and Mechanical Properties of A₃Mn₂O₇(A = Sr, Ca): Ab Initio Calculation