The effect of cation disorder on magnetic properties of new double perovskites La2Ni Co1-MnO6 (x = 0.2–0.8)

Harbi, A.; Moutaabbid, Hicham; Li, Y.; Renero-Lecuna, Carlos; Fialin, Michel; Godec, Yann Le; Benmokhtar, S.; Moutaabbid, M.

doi:10.1016/j.jallcom.2018.10.360

Cited by 24 publications

(5 citation statements)

References 46 publications

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“…33 Recently, the magnetic dilution effect in La 2 Co 1−x Mg x MnO 6 revealed similar suppression of hightemperature ferromagnetism. 34 However, the substitution of Co by Ni results in an upward shift of the high temperature T C in La 2 Ni x Co 1−x MnO 6 as per expectation since La 2 MnNiO 6 exhibits magnetic ordering at 280 K. 35 Recently, substitution of Mn by Ru in La 2 Mn 1−x Ru x CoO 6 (x = 0, 0.1, 0.2, 0.3, 0.5, 0.75, 1.0) is reported to exhibit structural transition from disordered orthorhombic (0 ≤ x ≤ 0.3) to ordered monoclinic structure for 0.5 ≤ x ≤ 1 and the ferromagnetic T C gradually decreases with the increase in Ru up to x = 0.75 eventually switching to an antiferromagnetic phase for x = 1. 36 The subtle role of structural effect, cationic disordering, and valence ratio Mn 3+ /Mn 4+ and Co 3+ /Co 2+ as well as the presence of other cations in the B-site is yet to be understood properly.…”

Section: ■ Introductionmentioning

confidence: 86%

Observation of Predominant Long-Range Ordering by Overcoming the Magnetic Frustration in Cu-Doped La₂MnCoO₆

et al. 2021

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We have investigated the effect of copper substitution on the structure, cation valence, and magnetic properties of the double p erovskit e La 2 MnCoO 6 . La 2 Mn 1−x Cu x CoO 6 (0 ≤ x ≤ 0.4) were synthesized by the sol− gel techniques and characterized by PXRD, FE-SEM, EDX, XPS, and both the dc-and ac-magnetization. There is a structural transition for copper substitution, where the monoclinic structure of the parent La 2 MnCoO 6 transformed to the rhombohedral structure. The ionic size difference between Mn 4+ (0.53 Å) and Cu 2+ (0.73 Å) may be ascribed to be the driving force behind the structural transition with an increase in Cu doping. EDX analysis confirms the nominal cationic compositions and chemical homogeneity of the samples. The copper substitution has a large impact on the valency of both the Mn and Co cations by following the charge neutrality condition: 3+ , where x is the doping concentration. There is also the Co 2+ + Mn 4+ = Co 3+ + Mn 3+ interaction. The presence of multivalent cations is evidenced from the XPS analysis. This largely influences the cationic ordering as well as the magnetic interactions. The monoclinic structure of the x = 0 and 0.1 samples show long-range ferromagnetic ordering. This is associated with the Mn 4+ OCo 2+ ferromagnetic superexchange interaction in the ordered state of Mn 4+ and Co 2+ . For small Cu doping (x = 0.1), this interaction is marginally disturbed. However, in the rhombohedral phase for x ≥ 0.2, the ferromagnetic interaction is largely suppressed with the evolution of competing antiferromagnetic interactions between the multivalent cations. Most importantly, in the panorama of multivalent mixed cations with randomness and competing exchange interactions, which are the fundamental ingredients of magnetic frustration, the antisite-disordered induced magnetic frustration for x = 0 is practically suppressed for x ≥ 0.2. The antiferromagnetic ordering over magnetic frustration can be attributed to the local lattice distortion induced by Jahn−Teller-active Cu 2+ and Mn 3+ and intermediate-spin-state Co 3+ ions.

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Section: ■ Introductionmentioning

confidence: 86%

Observation of Predominant Long-Range Ordering by Overcoming the Magnetic Frustration in Cu-Doped La₂MnCoO₆

et al. 2021

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“…[11,12] Harbi et al have reported effect of cation disorder and study the structural and magnetic properties of "Co" doped LNMO and confirmed that it has monoclinic structure with space group P21/n. [13] Najar et al have reported optical properties of LNMO with the substitutional doping of lanthanum manganate oxide and confirmed that optical bandgap of the material in varies from the electronic bandgap due to excitonic effects. [14] Sheikh et al have reported the theoretical DFT calculations and experimental work on Sm 2 NiMnO 6 double perovskite which is almost similar kind of materials as of LNMO and show properties for solar applications.…”

Section: Introductionmentioning

confidence: 92%

“…have reported effect of cation disorder and study the structural and magnetic properties of “Co” doped LNMO and confirmed that it has monoclinic structure with space group P21/n. [ 13 ] Najar et al. have reported optical properties of LNMO with the substitutional doping of lanthanum manganate oxide and confirmed that optical bandgap of the material in varies from the electronic bandgap due to excitonic effects.…”

Section: Introductionmentioning

confidence: 98%

Effect of Series Resistance and Temperature on PCE of Double Perovskite La₂NiMnO₆‐Based PSC

Raj

Kumar

et al. 2023

Macromolecular Symposia

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In the present work, lead-free double perovskite material La 2 NiMnO 6 is used as a light-harvesting layer in device configuration of FTO/TiO 2 /LNMO/CuI/Au and simulates through solar cell capacitance simulator (SCAPS-1D). The series resistance and operating temperature are varied from 0 to 6 𝛀 and 250 to 350 K respectively to investigate the device output under ambient atmospheric conditions. The designed perovskite solar cell (PSC) based device helps to optimize the chemical and physical parameter of PSC during the fabrication. The present study exhibits that the developed device can show maximum power conversion efficiency (PCE) of 23.07% at the device approach to zero resistance and further, at operation temperature 250 K the device has shown superior PCE 26.79%.

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“…For example, the ability of a complex oxide to accommodate disorder has been linked to its amorphization resistance. [1][2][3] Further, many functional properties of complex oxides, including conductivity, [4][5][6][7] mechanical properties, 8 energy density, 9 and magnetic properties, 10 are sensitive to the level of cation disorder in the material. Thus, it is of general interest to understand which oxides will readily disorder and which will not.…”

Section: Introductionmentioning

confidence: 99%

How inversion relates to disordering tendencies in complex oxides

Kocevski,

Pilania,

Uberuaga

2023

Phys. Chem. Chem. Phys.

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The effect of cation disorder on magnetic properties of new double perovskites La2Ni Co1-MnO6 (x = 0.2–0.8)

Abstract: The effect of cation disorder on magnetic properties of new double perovskites La 2 Ni x Co 1-x MnO 6 (x = 0.2-0.8),

Cited by 24 publications

References 46 publications

Observation of Predominant Long-Range Ordering by Overcoming the Magnetic Frustration in Cu-Doped La₂MnCoO₆

Observation of Predominant Long-Range Ordering by Overcoming the Magnetic Frustration in Cu-Doped La₂MnCoO₆

Effect of Series Resistance and Temperature on PCE of Double Perovskite La₂NiMnO₆‐Based PSC

How inversion relates to disordering tendencies in complex oxides

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The effect of cation disorder on magnetic properties of new double perovskites La2Ni Co1-MnO6 (x = 0.2–0.8)

Abstract: The effect of cation disorder on magnetic properties of new double perovskites La 2 Ni x Co 1-x MnO 6 (x = 0.2-0.8),

Cited by 24 publications

References 46 publications

Observation of Predominant Long-Range Ordering by Overcoming the Magnetic Frustration in Cu-Doped La2MnCoO6

Observation of Predominant Long-Range Ordering by Overcoming the Magnetic Frustration in Cu-Doped La2MnCoO6

Effect of Series Resistance and Temperature on PCE of Double Perovskite La2NiMnO6‐Based PSC

How inversion relates to disordering tendencies in complex oxides

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Observation of Predominant Long-Range Ordering by Overcoming the Magnetic Frustration in Cu-Doped La₂MnCoO₆

Observation of Predominant Long-Range Ordering by Overcoming the Magnetic Frustration in Cu-Doped La₂MnCoO₆

Effect of Series Resistance and Temperature on PCE of Double Perovskite La₂NiMnO₆‐Based PSC