Landau analysis of the symmetry of the magnetic structure and magnetoelectric interaction in multiferroics

Harris, A. B.

doi:10.1103/physrevb.76.054447

Cited by 142 publications

(66 citation statements)

References 74 publications

(191 reference statements)

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“…7) will proceed by either a reversal of the checkerboard charge ordering on the B-site or by a reversal of a lattice mode that influences the A -site charge ordering. Calculation of the polarization from our P nn2 model in the point charge approximation using average formal valence states for A -and B-sites and our crystallographic coordinates reveals a theoretical spontaneous polarization of 8 are indeed comparable to what we find here from our point charge calculations.…”

Section: Charge Ordering and Improper Ferroelectric Couplingsupporting

confidence: 76%

“…For the most part, experimental studies have hence been confined to Ti-, Pb-, or Bi-containing perovskites, where a strong desire for these cations to undergo a second-order Jahn-Teller distortion provides a local driving force for the resulting proper ferroelectricity. On the other hand, in the field of improper ferroelectrics, remarkable progress has been made in understanding the coupling mechanisms that arise from lattice and magnetic instabilities [8][9][10]. For instance, recent work in the closely related layered Ruddlesden-Popper perovskites has led to theoretical predictions of improper ferroelectricity arising due to the coupling of two tilt modes of BO 6 octahedra [2] to a third polar instability.…”

Section: Introductionmentioning

confidence: 99%

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Improper ferroelectric polarization in a perovskite driven by intersite charge transfer and ordering

Chen

Wang

et al. 2018

Phys. Rev. B

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It is of great interest to design and make materials in which ferroelectric polarization is coupled to other order parameters such as lattice, magnetic, and electronic instabilities. Such materials will be invaluable in next-generation data storage devices. Recently, remarkable progress has been made in understanding improper ferroelectric coupling mechanisms that arise from lattice and magnetic instabilities. However, although theoretically predicted, a compact lattice coupling between electronic and ferroelectric (polar) instabilities has yet to be realized. Here we report detailed crystallographic studies of a perovskite Hg A MnO 12 that is found to exhibit a polar ground state on account of such couplings that arise from charge and orbital ordering on both the A -and B-sites, which are themselves driven by a highly unusual Mn A -Mn B intersite charge transfer. The inherent coupling of polar, charge, orbital, and hence magnetic degrees of freedom make this a system of great fundamental interest, and demonstrating ferroelectric switching in this and a host of recently reported hybrid improper ferroelectrics remains a substantial challenge.

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Section: Charge Ordering and Improper Ferroelectric Couplingsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Improper ferroelectric polarization in a perovskite driven by intersite charge transfer and ordering

Chen

Wang

et al. 2018

Phys. Rev. B

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“…[5][6][7][8] The Ni 3 V 2 O 8 ͑NVO͒ oxide represents magnetic insulator with orthorhombic crystal structure ͑space group Cmca No. 64͒.…”

Section: Introductionmentioning

confidence: 99%

V51NMR study of the kagome staircase compoundNi3V2
Ogloblichev
¹
,
Kumagai
²
,
Verkhovskiǐ
³

et al. 2010
Phys. Rev. B
12
2
5
0
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We used 51 V NMR to study magnetic ordering in the Ni 3 V 2 O 8 single crystal with a Kagome staircase structure of Ni atoms. The NMR spectra were measured in the temperature range T = ͑3 -300͒ K and magnetic fields H = ͑2 -9.4͒ T directed along the main a , b , c axes of the orthorhombic ͑Cmca͒ crystal. The local magnetic field at the 51 V NMR probe determines position and the shape of the corresponding NMR line. These parameters yield an unique information, respectively, on the uniform and the staggered spin components of the ordered Ni. The NMR data collected at H Ն 2 T are considered in line with predictions of the representation theory ͓A. Harris, Phys. Rev. B 76, 054447 ͑2007͔͒ with a result that incommensurate amplitude-modulated structure of the spine Ni s spins acquires in the high-temperature incommensurate ͑HTI͒ phase two prominent nearly equal spin components S a Ϸ S c ӷ S b instead of the longitudinal incommensurate spin-density wave ͑SDW͒ order with S a ӷ S c , S b as it was deduced from neutron-diffraction data ͓M. Kenzelmann et al., Phys. Rev. B 74, 014429 ͑2006͔͒. No noticeable variation of SDW polarization in the ab plane was detected below the HTI-low-temperature incommensurate ͑LTI͒ transition. In both the HTI and LTI phases two almost equal spin components of the Ni s spins S a Ϸ S c ӷ S b exist at H Ͻ 4.7 T. Their phasing is still not determined. The bulk magnetization in these phases is explained by contribution of the cross-tie Ni c spins which antiferromagnetic structure in the LTI phase is canted along H.

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“…In previous work, MFE was discussed on the basis of a phenomenological model according to which the chirality in RFMO itself breaks the inversion symmetry [3,4]. Later on, however, it was pointed out that the spin helicity along the c axis may also contribute to MFE [8].…”

mentioning

confidence: 95%

“…Recently, magnetoferroelectricity (MFE), which deals with the phenomenon of the simultaneous appearance of electrical polarization and magnetic ordering [2], has been observed in some TLAFMs with an electrical polarization P perpendicular to the spin rotational plane and discussed in the context of inversion symmetry breaking by chirality [3][4][5][6][7][8][9]. In CuCrO 2 [5], P is induced parallel to the triangular plane in the out-of-plane 120°ordering state below T N ¼ 23.6 K [6].…”

mentioning

confidence: 98%

Spin-Chirality-Driven Ferroelectricity on a Perfect Triangular Lattice Antiferromagnet

et al. 2014

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Magnetic field (B) variation of the electrical polarization P(c) (∥c) of the perfect triangular lattice antiferromagnet RbFe(MoO(4))(2) is examined up to the saturation point of the magnetization for B⊥c. P(c) is observed only in phases for which chirality is predicted in the in-plane magnetic structures. No strong anomaly is observed in P(c) at the field at which the spin modulation along the c axis, and hence the spin helicity, exhibits a discontinuity to the commensurate state. These results indicate that the ferroelectricity in this compound originates predominantly from the spin chirality, the explanation of which would require a new mechanism for magnetoferroelectricity. The obtained field-temperature phase diagram of ferroelectricity agree well with those theoretically predicted for the spin chirality of a Heisenberg spin triangular lattice antiferromagnet.

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Landau analysis of the symmetry of the magnetic structure and magnetoelectric interaction in multiferroics

Cited by 142 publications

References 74 publications

Improper ferroelectric polarization in a perovskite driven by intersite charge transfer and ordering

Improper ferroelectric polarization in a perovskite driven by intersite charge transfer and ordering

V51NMR study of the kagome staircase compoundNi3V2
Ogloblichev
¹
,
Kumagai
²
,
Verkhovskiǐ
³

et al. 2010
Phys. Rev. B
12
2
5
0
View full text Add to dashboard Cite

Spin-Chirality-Driven Ferroelectricity on a Perfect Triangular Lattice Antiferromagnet

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Landau analysis of the symmetry of the magnetic structure and magnetoelectric interaction in multiferroics

Cited by 142 publications

References 74 publications

Improper ferroelectric polarization in a perovskite driven by intersite charge transfer and ordering

Improper ferroelectric polarization in a perovskite driven by intersite charge transfer and ordering

V51NMR study of the kagome staircase compoundNi3V2Ogloblichev1, Kumagai2, Verkhovskiǐ3 et al. 2010Phys. Rev. B12250View full textAdd to dashboardCite

Spin-Chirality-Driven Ferroelectricity on a Perfect Triangular Lattice Antiferromagnet

Contact Info

Product

Resources

About

V51NMR study of the kagome staircase compoundNi3V2
Ogloblichev
¹
,
Kumagai
²
,
Verkhovskiǐ
³

et al. 2010
Phys. Rev. B
12
2
5
0
View full text Add to dashboard Cite