Improved magnetic performance of Co-doped La2NiMnO6 ceramics prepared at low temperature

Gan, Hui; Wang, Chuanbin; Shen, Qiang

doi:10.1016/j.jeurceramsoc.2020.01.028

Cited by 16 publications

(5 citation statements)

References 52 publications

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“…A significantly greater difference in ionic radii of Ni 3+ and Fe 3+ as compared to Mn 3+ and Fe 3+ in this case, apparently, is the main cause of the predominant substitution of manganese ion octahedral sites for iron ions. It should be noted that the result obtained contradicts to some extent to the conclusion made in [13,14] where the authors concluded that doping La 2 NiMnO 6 double perovskite with d-elements takes place as a result of Ni substitution in octahedral sites. The explanation of this discrepancy may be the fact that in the given papers the substitution of ions in octahedral sites of La 2 NiMnO 6 double perovskite was performed by other methods and for other d-elements.…”

Section: Findings and Discussioncontrasting

confidence: 72%

“…In these compounds, cation sublattices of d-elements -B and B , as a rule, have the capability of ferromagnetic or antiferromagnetic ordering [11], which determines, to a great extent, the formation of physical properties of materials based on them. B and B elements variation or their partial substitution for other elements may significantly affect the properties of materials [12][13][14]. Changing the properties by the partial substitution of ions in octahedral sublattices may also be defined by the peculiarities of the electronic structure of substituting cations and by their impact on the redistribution of major cations -B and B -to octahedral sites, as, for example, in the case of phases having a chrysoberyl structure BeM eM e O 4 described in [15].…”

Section: Introductionmentioning

confidence: 99%

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Formation of nanocrystalline particles on the basis of La2(Ni,Mn,Fe)2O6 variable composition phases having a structure of double perovskite under conditions of solution combustion

Averkiev¹,

Larina²,

Shevaleevskiy³

et al. 2022

Nanosystems: Phys. Chem. Math.

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Nanocrystalline particles on the basis of La 2 (Ni,Mn,Fe) 2 O 6 variable composition phases of a double perovskite structure have been produced by glycine-nitrate combustion. The size of crystallites grows from 5 to 45 nm with an increase in iron content of synthesized particles. It is demonstrated that iron unevenly builds into octahedral sites of nickel and manganese ions substituting mainly manganese ions. At the same time, the dependence of double perovskite unit cell volume on the iron ions concentration is well described by Retgers' law. KEYWORDS double perovskite, nanocrystals, solution combustion, photovoltaics. ACKNOWLEDGEMENTS The authors express their gratitude to V. V. Gusarov for the attention he paid to the work. X-ray diffraction and SEM was performed using the equipment of the Engineering Center of Saint Petersburg State Institute of Technology. This study was financially supported by the Russian Science Foundation (project no. 20-63-47016). FOR CITATION Averkiev D.D., Larina L.L., Shevaleevskiy O.I., Almjasheva O.V. Formation of nanocrystalline particles on the basis of La 2 (Ni,Mn,Fe) 2 O 6 variable composition phases having a structure of double perovskite under conditions of solution combustion.

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Section: Findings and Discussioncontrasting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Formation of nanocrystalline particles on the basis of La2(Ni,Mn,Fe)2O6 variable composition phases having a structure of double perovskite under conditions of solution combustion

Averkiev¹,

Larina²,

Shevaleevskiy³

et al. 2022

Nanosystems: Phys. Chem. Math.

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“…Figure 4b shows the distribution of Raman spectral peaks obtained from the superlattice films with different strains. Strong modes around 650 and 530 cm −1 are assigned to symmetric stretching (S) and antisymmetric stretching (AS) vibrations of the (Ni/Co/Mn)O 6 octahedra, respectively 49 . Strain has a significant effect on the Raman vibration modes.…”

Section: Resultsmentioning

confidence: 99%

Experimental demonstration of tunable hybrid improper ferroelectricity in double-perovskite superlattice films

Jiang,

Niu,

Wang

et al. 2024

Nat Commun

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Hybrid improper ferroelectricity can effectively avoid the intrinsic chemical incompatibility of electronic mechanism for multiferroics. Perovskite superlattices, as theoretically proposed hybrid improper ferroelectrics with simple structure and high technological compatibility, are conducive to device integration and miniaturization, but the experimental realization remains elusive. Here, we report a strain-driven oxygen octahedral distortion strategy for hybrid improper ferroelectricity in La2NiMnO6/La2CoMnO6 double-perovskite superlattices. The epitaxial growth mode with mixed crystalline orientations maintains a large strain transfer distance more than 90 nm in the superlattice films with lattice mismatch less than 1%. Such epitaxial strain permits sustainable long-range modulation of oxygen octahedral rotation and tilting, thereby inducing and regulating hybrid improper ferroelectricity. A robust room-temperature ferroelectricity with remnant polarization of ~ 0.16 μC cm−2 and piezoelectric coefficient of 2.0 pm V−1 is obtained, and the density functional theory calculations and Landau-Ginsburg-Devonshire theory reveal the constitutive correlations between ferroelectricity, octahedral distortions, and strain. This work addresses the gap in experimental studies of hybrid improper ferroelectricity for perovskite superlattices and provides a promising research platform and idea for designing and exploring hybrid improper ferroelectricity.

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“…Figure 5(a) shows the Raman spectra of the LM x NMO thin films, where the information about the vibration of Ni-O-Mn octahedron and the ordering/disordering degree at B-sites can be exposed. 21,31,[45][46][47][48][49] There are two distinct spectral peaks in the range of 400-800 cm −1 : the peak located at ∼520 cm −1 corresponds to the asymmetric stretching vibration (ASV) mode of Ni 3+ -O-Mn 3+ octahedron while the peak situated at ∼640 cm −1 represents the symmetric stretching vibration (SSV) mode of Ni 2+ -O-Mn 4+ octahedron. It is obvious that the intensity of SSV mode is significantly higher than that of ASV mode, which implies that the B-site ordering plays a dominant role in the LM x NMO thin films.…”

Section: Chemical Structurementioning

confidence: 99%

Substitutional effect of Mg²⁺ on structural and magnetic properties of La₂Mg_xNi_1‐xMnO₆ double‐perovskite thin films

et al. 2023

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By doping different concentrations of Mg2+ at Ni site, the (00l)‐oriented La2MgxNi1‐xMnO6 (abbreviated as LMxNMO, x = 0, 0.1, 0.2, 0.3, 0.4) double‐perovskite thin films were epitaxially grown by pulsed laser deposition. The substitutional effect of Mg2+ on the structural and magnetic properties of the films is comprehensively investigated. It is found that with the increase of Mg‐doping concentration, the in‐plane and out‐of‐plane lattice constants as well as the cell volume of the LMxNMO thin films increase, which could be ascribed to the radius difference between Mg2+ and Ni2+/Ni3+ ions, resulting in the in‐plane compressive stress in LMxNMO films. When the Mg‐doping concentration is small (x ≤ 0.1), the doped Mg2+ tends to substitute Ni3+, which restrains the intensity of antiferromagnetic interaction between Ni3+‐O‐Mn3+, resulting in the reduced the exchange bias field as well as the increased the saturation magnetization. However, when the Mg‐doping concentration increases to x ≥ 0.2, Mg2+ becomes to mainly replace Ni2+ position, which could inhibit the super‐exchange ferromagnetic interaction between Ni2+‐O‐Mn4+ magnetic paths and thus reduce the saturation magnetization. The enhanced magnetic properties can be obtained in the LM0.1NMO double‐perovskite thin film, with a large saturation magnetization of 492.12 emu/cm3 and a high Curie temperature of 262.7 K.

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Improved magnetic performance of Co-doped La2NiMnO6 ceramics prepared at low temperature

Cited by 16 publications

References 52 publications

Formation of nanocrystalline particles on the basis of La2(Ni,Mn,Fe)2O6 variable composition phases having a structure of double perovskite under conditions of solution combustion

Formation of nanocrystalline particles on the basis of La2(Ni,Mn,Fe)2O6 variable composition phases having a structure of double perovskite under conditions of solution combustion

Experimental demonstration of tunable hybrid improper ferroelectricity in double-perovskite superlattice films

Substitutional effect of Mg²⁺ on structural and magnetic properties of La₂Mg_xNi_1‐xMnO₆ double‐perovskite thin films

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Improved magnetic performance of Co-doped La2NiMnO6 ceramics prepared at low temperature

Cited by 16 publications

References 52 publications

Formation of nanocrystalline particles on the basis of La2(Ni,Mn,Fe)2O6 variable composition phases having a structure of double perovskite under conditions of solution combustion

Formation of nanocrystalline particles on the basis of La2(Ni,Mn,Fe)2O6 variable composition phases having a structure of double perovskite under conditions of solution combustion

Experimental demonstration of tunable hybrid improper ferroelectricity in double-perovskite superlattice films

Substitutional effect of Mg2+ on structural and magnetic properties of La2MgxNi1‐xMnO6 double‐perovskite thin films

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Substitutional effect of Mg²⁺ on structural and magnetic properties of La₂Mg_xNi_1‐xMnO₆ double‐perovskite thin films