Unravelling the role of Bi-substitution on vibronic ferromagnetism in La2−xBixMnCoO6 (x = 0, 0.5 and 1)

Haque, Ariful; Das, Radhamadhab; Ghosh, D.; Lebedev, Oleg I.; Ray, Partha Pratim; Kundu, Asish K.; Seikh, Md. Motin

doi:10.1016/j.jmmm.2020.167159

Cited by 7 publications

(23 citation statements)

References 52 publications

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“…for fully ordered La 2 Mn 4+ Co 2+ O 6 . 7,25 Still, there are about 1% antisite Co 2+ and Mn 4+ . This confirms the long range-type magnetic ordering and full stoichiometry of the parent La 2 MnCoO 6 phase.…”

Section: ■ Experimental Detailsmentioning

confidence: 98%

“…This is the well-established paramagnetic to ferromagnetic transition due to long-range ferromagnetic Mn 4+ OCo 2+ (e g 0 Oe g 2 ) superexchange interaction in the ordered La 2 MnCoO 6 . 7,13,25,38,46 It was shown that T C = 225 K corresponds to the fully oxygen stoichiometric phase. 7 There is a large thermomagnetic irreversibility between ZFC and FC data.…”

Section: ■ Experimental Detailsmentioning

confidence: 99%

“…This was attributed to the partial disordering of the cations or the vibronic ferromagnetic coupling between the intermediate-spin-state Co 3 + and high-spin Mn 3 + ions. 7,11,[14][15][16][17][18][19]25,46 Accordingly, La 2 MnCoO 6 was reported to manifest multiple magnetic transitions in both the ZFC and FC data. 13,48 The lack of such additional anomaly in dc-magnetization for the x = 0 sample below T C suggests the prevalence of well-known long range-type magnetic ordering of our sample.…”

Section: ■ Experimental Detailsmentioning

confidence: 99%

“…There is also the interaction Co 2+ + Mn 4+ = Co 3+ + Mn 3+ , which is biased to left by about 0.2 eV. 7,25 Thus, there is obvious changes in the Co 2+ /Co 3+ and Mn 4+ /Mn 3+ ratio with Cu doping. Such changes in cationic valence are supported from the XPS analysis discussed in the preceding section.…”

Section: ■ Experimental Detailsmentioning

confidence: 99%

“…It arises from the quasi-static e g 1 Oe g 1 superexchange interaction between Mn 3+ and intermediate-spin Co 3+ that is manifested by magnetic transition at lower temperatures. 7,13,25 Here, Mn 3+ (d 4 : t 2g ) with both asymmetrically filled t 2g and e g levels. The genesis of Mn 3+ OCo 3+ (e g 1 Oe g 1…”

Section: ■ Introductionmentioning

confidence: 99%

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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: ■ Experimental Detailsmentioning

confidence: 98%

Section: ■ Experimental Detailsmentioning

confidence: 99%

Section: ■ Experimental Detailsmentioning

confidence: 99%

Section: ■ Experimental Detailsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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

et al. 2021

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The exchange bias effect and Griffiths phase in La1.5Sr0.5Co1-Ni MnO6: The impact of the divalent Ni

Zhang

Wang

Chen

et al. 2023

Current Applied Physics

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Inducing the cocktail effect in yolk-shell high-entropy perovskite oxides using an electronic structural design for improved electrochemical applications

Nan

et al. 2023

Chemical Engineering Journal

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Unravelling the role of Bi-substitution on vibronic ferromagnetism in La2−xBixMnCoO6 (x = 0, 0.5 and 1)

Cited by 7 publications

References 52 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

The exchange bias effect and Griffiths phase in La1.5Sr0.5Co1-Ni MnO6: The impact of the divalent Ni

Inducing the cocktail effect in yolk-shell high-entropy perovskite oxides using an electronic structural design for improved electrochemical applications

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Unravelling the role of Bi-substitution on vibronic ferromagnetism in La2−xBixMnCoO6 (x = 0, 0.5 and 1)

Cited by 7 publications

References 52 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

The exchange bias effect and Griffiths phase in La1.5Sr0.5Co1-Ni MnO6: The impact of the divalent Ni

Inducing the cocktail effect in yolk-shell high-entropy perovskite oxides using an electronic structural design for improved electrochemical applications

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Product

Resources

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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