Coupled magnetic and ferroelectric states in the distorted honeycomb system 
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Panja, Soumendra Nath; Harnagea, Luminita; Kumar, Jitender; Mukharjee, Prashanta K.; Nath, R.; Nigam, A. K.; Nair, Sunil

doi:10.1103/physrevb.98.024410

Cited by 20 publications

(15 citation statements)

References 25 publications

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“…Our measurements reveal that Mn 3 WO 6 is a spin-induced multiferroic material, fully analogous to the isostructural Mn 3 TeO 6. This finding and the recently reported Fe 4 Nb 2 O 9 and Fe 4 Ta 2 O 9 “429” compounds − confirm that magnetic oxides crystallizing in trigonal structures provide a potential source of multiferroic and/or magnetoelectric candidates. In contrast to the corundum and its derivatives members, this Mn 3 WO 6 polymorph crystallizing in the Mg 3 TeO 6 structure does not contain pairs of face-shared MnO 6 octahedra.…”

Section: Discussionsupporting

confidence: 76%

Spin-Induced Multiferroic Behavior in Centrosymmetric Mn₃WO₆

et al. 2020

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The Mn 3 WO 6 oxide, prepared by a solid-state reaction at ambient pressure, is found to crystallize at room temperature in the centrosymmetric R3̅ trigonal structure of Mg 3 TeO 6 . By X-ray absorption spectroscopy (XAS) at the Mn-L 2,3 edges, a divalent oxidation state for manganese is established, consistent with W 6+ and O 2− , which fits with the value extracted from analyzing the paramagnetic regime. Interestingly, anomalies in dielectric and pyroelectric measurements can be observed concomitant with the antiferromagnetic transition at T N ≈ 25 K. The corresponding electrical polarization, P = ±15 μC m −2 below T N , can be inverted by opposite poling, which confirms that Mn 3 WO 6 is a spin-induced multiferroic (MF) material.

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Section: Discussionsupporting

confidence: 76%

Spin-Induced Multiferroic Behavior in Centrosymmetric Mn₃WO₆

et al. 2020

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“…Recently, the family of A 4 M 2 O 9 (A = Fe, Co, Mn and M = Nb, Ta) materials has attracted profound research interest owing to the observation of novel LME effect [9][10][11][12][13][14][15][16][17]. At ambient conditions, these materials crystallize in a trigonal P-3c1 centrosymmetric space group, analogous to the magnetoelectric corundum-type Cr 2 O 3 [18].…”

Section: Introductionmentioning

confidence: 99%

Low-temperature crystal and magnetic structures of the magnetoelectric material Fe4Nb2O9

Jana

Sheptyakov

et al. 2019

Phys. Rev. B

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Fe 4 Nb 2 O 9 was recently reported to be a new magnetoelectric material with two distinct dielectric anomalies located at T N ≈ 90 K for an antiferromagnetic transition and T str ≈ 77 K of unknown origin, respectively. By analyzing low-temperature neutron-powder-diffraction data, here we determined its magnetic structure below T N and uncovered the origin of the second dielectric anomaly as a structural phase transition across T str . In the antiferromagnetically ordered state below T N , both Fe1 and Fe2 magnetic moments lying within the weakly and strongly buckled honeycomb layers are arranged in a fashion that the three nearest neighbors are directed oppositely. Upon cooling below T str , the symmetry of crystal structure is lowered from trigonal P-3c1 to monoclinic C2/c, in which a weak sliding of the metal octahedral planes introduces a monoclinic distortion of ∼1.7 • . The magnetic structure is preserved in the low-temperature monoclinic phase, and the Fe magnetic moment increases from 2.1(1)μ B at 95 K to 3.83(4)μ B at 10 K assuming an equal moment configuration at Fe1 and Fe2 sites. The magnetic point group and linear magnetoelectric tensor at each temperature region are determined. From a symmetry-related tensor analysis, the microscopic origins of the magnetoelectric effects between T N and T str are proved to be spin-current and d-p hybridization mechanisms.

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“…In that respect, isostructural FNO and FTO exhibit much higher T N , T N = 90 K and T N = 85 K for M'=Nb [3][4][5] and M'=Ta, [6,7] respectively. As for the cobalt based '429', FNO and FTO crystallographic parameters are rather similar, with again the T N of the tantalate lower than that of the niobiate.…”

Section: Introductionmentioning

confidence: 93%

“…In the FTO case, the magnetic and ME behaviours are even more complex with a structural transition below T N , setting in at T S = 30 K, below which a difference is observed in the ME properties: FTO being a type II multiferroic (spontaneous electric polarization (P) coexisting with AF) below T S = 30 K, it exhibits LME properties only between T S and T N . [6,7] Accordingly, α ME for FTO can be determined only for 30 K < T < 85 K. For instance, at T = 50 K, [6] a temperature at which CNO and CTO are paramagnetic, a calculated α ME value of 27.9 ps/m is obtained, surpassing those of CNO, CTO and FNO at lower temperature. The main characteristic structural and physical parameters of FNO, FTO, CNO and CTO, are summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Structural, magnetic and magnetoelectric properties of Co₂Fe₂Ta₂O₉, a T_N=53 K honeycomb antiferromagnet

Maignan

Martin

2022

Zeitschrift anorg allge chemie

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The bimetallic oxides of general M4M’2O9 formula, where M=Fe, Co, Mn and M’=Nb or Ta, form a family of linear magnetoelectric materials, for which properties depend on the nature of the M,M’ pair. In the present study, the structural, magnetic and magnetoelectric properties of a new member, Co2Fe2Ta2O9, synthesized in polycrystalline form, are reported. This compound crystallizing in the P‐3c1 trigonal ‘429’ structure (a=5.2009 (1) Å, c=14.1986(1) Å and V=332.613(2) Å3) is found to be antiferromagnetic below TN=53 K. Although the structural features are intermediate between the Co4Ta2O9 and Fe4Ta2O9 limit members, a very different magnetoelectric behaviour is observed. In order to reveal the differences between M4M’2O9 with M=Fe or Co or mixed and M’=Ta or Nb, a comparison between these six compounds is proposed.

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Coupled magnetic and ferroelectric states in the distorted honeycomb system Fe4Ta2O9

Cited by 20 publications

References 25 publications

Spin-Induced Multiferroic Behavior in Centrosymmetric Mn₃WO₆

Spin-Induced Multiferroic Behavior in Centrosymmetric Mn₃WO₆

Low-temperature crystal and magnetic structures of the magnetoelectric material Fe4Nb2O9

Structural, magnetic and magnetoelectric properties of Co₂Fe₂Ta₂O₉, a T_N=53 K honeycomb antiferromagnet

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Coupled magnetic and ferroelectric states in the distorted honeycomb system Fe4Ta2O9

Cited by 20 publications

References 25 publications

Spin-Induced Multiferroic Behavior in Centrosymmetric Mn3WO6

Spin-Induced Multiferroic Behavior in Centrosymmetric Mn3WO6

Low-temperature crystal and magnetic structures of the magnetoelectric material Fe4Nb2O9

Structural, magnetic and magnetoelectric properties of Co2Fe2Ta2O9, a TN=53 K honeycomb antiferromagnet

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Product

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Spin-Induced Multiferroic Behavior in Centrosymmetric Mn₃WO₆

Spin-Induced Multiferroic Behavior in Centrosymmetric Mn₃WO₆

Structural, magnetic and magnetoelectric properties of Co₂Fe₂Ta₂O₉, a T_N=53 K honeycomb antiferromagnet