Structural and magnetic properties of LiMn1.5Fe0.5O4 spinel oxide

Li, Yang; Ma, Boyu; Chen, Ning; Lu, Jun; Wang, Aihua; Liu, Lihua; Liu, Yang; Wang, Weipeng; Li, Xiaoxiang; Cardona, Yenny; Uwakweh, O. N. C.; Rong, Chuanbing; Gao, Jie; Lu, Junqiang; Xu, Zhaojun; Ma, Xingqiao

doi:10.1016/j.physb.2010.08.050

Cited by 10 publications

(10 citation statements)

References 26 publications

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“…It is worth noting that the DM interactions in single Mn(IV) 3 Mn(III) tetrahedron are asymmetric due to the difference in the magnitude between the Dzyaloshinskii vectors within the Mn(III)–O–Mn(IV) bond and within the Mn(IV)–O–Mn(IV) bond and the difference between the distinct spin states for Mn ions (see Figure S8 for details). In the Heisenberg antiferromagnets of CdCr 2 O 4 and the x = 0.07 phase, having symmetrical tetrahedral structures, a spin-Peierls-like lattice distortion stabilizes the collinear or coplanar magnetic ground state. , It has been reported that a spinel Li 0.5 Mn(IV)Mn(III) 0.5 Fe(III) 0.5 O 4 exhibits an AFM order with a similar anomaly in χ′ –T curves . In particular, the isotopological Cu 2 OSeO 3 , whose space group ( P 2 1 3) is the same as that of Li 0.50 Mn 2 O 4 , gives rise to a complex noncollinear ferrimagnetic configuration; the DM interactions in this space group with the absence of both inversion and mirror symmetries result in a chiral skyrmionic helimagnet. , …”

Section: Resultsmentioning

confidence: 99%

“…45,46 It has been reported that a spinel Li 0.5 Mn(IV)Mn(III) 0.5 Fe(III) 0.5 O 4 exhibits an AFM order with a similar anomaly in χ′−T curves. 47 In particular, the isotopological Cu 2 OSeO 3 , whose space group (P2 1 3) is the same as that of Li 0.50 Mn 2 O 4 , gives rise to a complex noncollinear ferrimagnetic configuration; the DM interactions in this space group with the absence of both inversion and mirror symmetries result in a chiral skyrmionic helimagnet. 48,49 The spin-glass state is absent in the x = 0.07 sample, but a sharp, frequency-independent peak occurs at T N = 30 K in the χ′−T plots (see Figure 3c).…”

Section: ■ Introductionmentioning

confidence: 99%

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Electrochemical Tuning-Induced Magnetic Transitions in Geometrically Frustrated Spinel Li_xMn₂O₄ (0.07 ≤ x ≤ 0.93)

2021

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Precise tuning of the magnetic states of geometrically frustrated materials remains a critical challenge, as this process will not only promote understanding of fundamental magnetism but also accelerate the discovery of new materials with unprecedented magnetic behaviors. In this article, we present a study of the tuning magnetic properties of spinel LiMn2O4 by electrochemical oxidation/reduction in a lithium battery. The ex-situ magnetic susceptibility and specific heat measurements were performed on electrochemically modified Li x Mn2O4 with 0.07 ≤ x ≤ 0.93 to monitor the evolution of magnetic phase transitions and identify the new magnetic intermediate state. The results showed that the strong frustrated Li0.93Mn2O4 is in a spin-glass ground state, while the weak frustrated Li0.07Mn2O4 (or λ-MnO2) exhibits long-range antiferromagnetic order. In addition, a unique magnetic ground state of noncollinear antiferromagnetic order was found in the intermediate phase Li0.50Mn2O4 below 16 K, which was unveiled for the first time in the spinel Li x Mn2O4 system. The results of our work suggest that the nontrivial magnetic order may arise from the symmetry-broken spin states in a geometrically frustrated lattice and could be easily achieved by an electrochemical method but more difficult to prepare via traditional chemical methods.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Electrochemical Tuning-Induced Magnetic Transitions in Geometrically Frustrated Spinel Li_xMn₂O₄ (0.07 ≤ x ≤ 0.93)

2021

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“…[ 1–4 ] Among the components of LIBs, the cathode material is the main provider of Li‐ion and the key factor that affects the performance of the battery. [ 5,6 ] Therefore, the modification of the cathode material plays a key role in improving the electrochemical performance of LIBs.…”

Section: Introductionmentioning

confidence: 99%

First‐Principles Study of the Structure and Electronic Properties of Ti‐Doped LiCoO₂

Zhu

et al. 2020

Physica Status Solidi (b)

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Herein, the structure and electronic properties of Ti‐doped LiCoO2 have been studied systematically using the first‐principles projector augmented wave (PAW) method based on density functional theory (DFT). The structure is distorted due to the presence of Co2+ after Ti doping. When the concentration of dopant Ti is less than 5.6%, the volume change of unit cell is independent of the Ti‐doped concentration, but at higher dopant Ti concentration, the volume of unit cell increases with increase of dopant Ti concentration. Meanwhile, it is also found that the Li‐ion diffusion rate and electronic conductivity are improved, and the concentration of dopant Ti has little effect on the redox potential. These results can promote Ti‐doped layered Li transition metal oxide cathode materials’ studies and improve layered Li transition metal oxide cathode materials design for Li‐ion batteries (LIBs).

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“…Therefore, synthesizing high-quality spinel LiCoTiO 4 crystals simply and cost-effectively remains a challenge. Although various lithium-containing spinel crystals (including LiMn 1.5 Ni 0.5 -O 4 , 1,17 LiMn 2 O 4 , 4,18 LiCr 0.5 Mn 1.5 O 4 , 19 LiMn 1.5 Fe 0.5 O 4 , 20 etc.) usually with special (truncated) octahedral morphologies have been obtained, detailed investigations of the corresponding formation mechanisms are still needed.…”

Section: Introductionmentioning

confidence: 99%

High-quality spinel LiCoTiO₄single crystals with co-exposed {111} and {110} facets: flux growth, formation mechanism, magnetic behavior and their application in photocatalysis

Guo

2016

CrystEngComm

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Novel spinel LiCoTiO 4 single crystals with co-exposed {111} and {110} facets were grown for the first time using a facile LiCl flux method. The obtained cubic-phase LiCoTiO 4 crystals exhibit high crystallinity and regular octahedron-like geometric morphology. In this method, LiCl was used not only as an effective lithium source without any additives but also as the optimum molten medium compared with LiCl-NaCl and LiCl-KCl eutectic mixtures. The formation mechanism responsible for the flux-grown spinel LiCoTiO 4 crystals with co-exposed {111} and {110} facets was also proposed. Moreover, the spinel LiCoTiO 4 crystals showed a weak ferrimagnetic behavior with some antiferromagnetic effects. Photocatalytic tests revealed that the pure LiCoTiO 4 sample had a relatively low photocatalytic activity although it had a relatively narrow band-gap energy (1.58 eV) corresponding well to the broad visible spectrum. However, the spinel LiCoTiO 4 crystal could serve as an efficient visible-light sensitizer, and when coupled with graphitic carbon nitride (g-C 3 N 4 ) nanosheets, the novel LiCoTiO 4 /g-C 3 N 4 composites exhibited higher activity than pure g-C 3 N 4 for the photocatalytic degradation of organic pollutants under simulated sunlight. A possible mechanism for the improved photocatalytic performance was also proposed. Overall, our present work opens a new approach to fabricating other lithiated transition-metal oxide spinel crystals for broad industrial applications.

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Structural and magnetic properties of LiMn1.5Fe0.5O4 spinel oxide

Cited by 10 publications

References 26 publications

Electrochemical Tuning-Induced Magnetic Transitions in Geometrically Frustrated Spinel Li_xMn₂O₄ (0.07 ≤ x ≤ 0.93)

Electrochemical Tuning-Induced Magnetic Transitions in Geometrically Frustrated Spinel Li_xMn₂O₄ (0.07 ≤ x ≤ 0.93)

First‐Principles Study of the Structure and Electronic Properties of Ti‐Doped LiCoO₂

High-quality spinel LiCoTiO₄single crystals with co-exposed {111} and {110} facets: flux growth, formation mechanism, magnetic behavior and their application in photocatalysis

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Structural and magnetic properties of LiMn1.5Fe0.5O4 spinel oxide

Cited by 10 publications

References 26 publications

Electrochemical Tuning-Induced Magnetic Transitions in Geometrically Frustrated Spinel LixMn2O4 (0.07 ≤ x ≤ 0.93)

Electrochemical Tuning-Induced Magnetic Transitions in Geometrically Frustrated Spinel LixMn2O4 (0.07 ≤ x ≤ 0.93)

First‐Principles Study of the Structure and Electronic Properties of Ti‐Doped LiCoO2

High-quality spinel LiCoTiO4single crystals with co-exposed {111} and {110} facets: flux growth, formation mechanism, magnetic behavior and their application in photocatalysis

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Product

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Electrochemical Tuning-Induced Magnetic Transitions in Geometrically Frustrated Spinel Li_xMn₂O₄ (0.07 ≤ x ≤ 0.93)

Electrochemical Tuning-Induced Magnetic Transitions in Geometrically Frustrated Spinel Li_xMn₂O₄ (0.07 ≤ x ≤ 0.93)

First‐Principles Study of the Structure and Electronic Properties of Ti‐Doped LiCoO₂

High-quality spinel LiCoTiO₄single crystals with co-exposed {111} and {110} facets: flux growth, formation mechanism, magnetic behavior and their application in photocatalysis