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Lawes, G.; Harris, A. B.; Kimura, T.; Rogado, N.; Cava, R. J.; Aharony, Amnon; Entin‐Wohlman, O.; Yildirim, Taner; Kenzelmann, M.; Broholm, C.; Ramirez, A. P.

doi:10.1103/physrevlett.95.087205

Cited by 648 publications

(535 citation statements)

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“…1, 19 A general discussion of the symmetry of the magnetoelectric coupling in multiferroics is considered for the specific case of FeVO 4 in the following section. Investigations on multiferroic Ni 3 V 2 O 8 thin films, in which such a trilinear coupling is believed to be responsible for the multiferroic order, 1,7 have established that the multiferroic transition temperature can be varied through the application of either ͑or both͒ magnetic and electric fields, 19 confirming the strong coupling between magnetic and dielectric degrees of freedom. Higher order magnetoelectric coupling terms quadratic in both magnetic and ferroelectric terms will give rise to magnetization-induced shift in the dielectric response.…”

Section: Introductionmentioning

confidence: 99%

“…Our result is that a nonzero-induced spontaneous polarization P ជ requires having a magnetic spiral 31 described by two order parameters which are out of phase with respect to one another. 1,7,16,18 In this low-symmetry structure there are no restrictions on the orientation of P ជ based on symmetry arguments, unlike the majority of similar magnetically induced multiferroics. 1,7,11,16,31 This paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

“…15 Phenomenologically, magnetically induced ferroelectric order developing in systems having multiple magnetic phases can be understood by considering a trilinear term in the magnetoelectric free energy, F ME , coupling the electric polarization with two distinct order parameters 1 and 2 which together break inversion symmetry so that F ME ϰ P 1 2 . 1, 7,[16][17][18] Since the free energy must transform as a scalar, there are strong symmetry restrictions on the allowed representations for 1 and 2 ; in particular, the product 1 ͑q͒ 2 ͑q͒ ‫ء‬ must be antisymmetric under spatial inversion. This trilinear coupling also predicts electric field control of a magnetic order parameter.…”

Section: Introductionmentioning

confidence: 99%

“…4 Despite this apparent restriction, a rather large number of single-phase systems have been identified as magnetoelectric multiferroics. [5][6][7] A number of microscopic mechanisms have been proposed for the development of multiferroic order, including, a magnetic Jahn-Teller distortion 8 for TbMn 2 O 5 , 9 bond and site ordering having distinct centers of inversion symmetry, 10 a microscopic mechanism leading to a spincurrent interaction, 11 the Dzyloshinskii-Moriya interaction, 12 a general anisotropic exchange striction, 13 a spin-phonon interaction, 14 and a strain-induced ferroelectricity. 15 Phenomenologically, magnetically induced ferroelectric order developing in systems having multiple magnetic phases can be understood by considering a trilinear term in the magnetoelectric free energy, F ME , coupling the electric polarization with two distinct order parameters 1 and 2 which together break inversion symmetry so that F ME ϰ P 1 2 .…”

Section: Introductionmentioning

confidence: 99%

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Magnetic structure and magnetoelectric coupling in bulk and thin filmFeVO4

2010

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We have investigated the magnetoelectric and magnetodielectric response in FeVO 4 , which exhibits a change in magnetic structure coincident with ferroelectric ordering at T N2 ≈15 K. Using symmetry considerations, we construct a model for the possible magnetoelectric coupling in this system and present a discussion of the allowed spin structures in FeVO 4 . Based on this model, in which the spontaneous polarization is caused by a trilinear spin-phonon interaction, we experimentally explore the magnetoelectric coupling in FeVO 4 thin films through measurements of the electric field-induced shift of the multiferroic phase transition temperature, which exhibits an increase of 0.25 K in an applied field of 4 MV/m. The strong spin-charge coupling in FeVO 4 is also reflected in the significant magnetodielectric shift, which is present in the paramagnetic phase due to a quartic spin-phonon interaction and shows a marked enhancement with the onset of magnetic order which we attribute to the trilinear spin-phonon interaction. We observe a clear magnetic field-induced dielectric anomaly at lower temperatures, distinct from the sharp peak associated with the multiferroic transition, which we tentatively assign to a spin-reorientation crossover. We also present a magnetoelectric phase diagram for FeVO 4 . We have investigated the magnetoelectric and magnetodielectric response in FeVO 4 , which exhibits a change in magnetic structure coincident with ferroelectric ordering at T N2 Ϸ 15 K. Using symmetry considerations, we construct a model for the possible magnetoelectric coupling in this system and present a discussion of the allowed spin structures in FeVO 4 . Based on this model, in which the spontaneous polarization is caused by a trilinear spin-phonon interaction, we experimentally explore the magnetoelectric coupling in FeVO 4 thin films through measurements of the electric field-induced shift of the multiferroic phase transition temperature, which exhibits an increase of 0.25 K in an applied field of 4 MV/m. The strong spin-charge coupling in FeVO 4 is also reflected in the significant magnetodielectric shift, which is present in the paramagnetic phase due to a quartic spin-phonon interaction and shows a marked enhancement with the onset of magnetic order which we attribute to the trilinear spin-phonon interaction. We observe a clear magnetic field-induced dielectric anomaly at lower temperatures, distinct from the sharp peak associated with the multiferroic transition, which we tentatively assign to a spin-reorientation crossover. We also present a magnetoelectric phase diagram for FeVO 4 . Disciplines Physics | Quantum Physics

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic structure and magnetoelectric coupling in bulk and thin filmFeVO4

2010

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“…Such materials have been the subject of extensive research in recent years as these provide a platform to study the interesting physics associated with the mutual coupling between spin and lattice degrees of freedom and due to potential technological applications [1,2]. In this context, various transition metal oxides like orthomanganites [3], orthoferrites [4], nickelates and cobaltites [5], doped defossities [6], vanadites [7] etc which show multiferroic properties have been investigated. Though rare-earth orthochromites (LnCrO 3 , Ln = rare-earths) have been studied for several decades for their interesting physical properties [8][9][10][11][12][13], the interest to search for multiferroic behaviour and magnetoelectric (ME) coupling occurred during last few years only.…”

Section: Introductionmentioning

confidence: 99%

Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe_0.5Cr_0.5O₃

Sharma

Basu

Mukherjee

et al. 2016

J. Phys.: Condens. Matter

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We report the results of our investigations on the influence of partial substitution of Er and Gd for Dy on the magnetic and magnetoelectric properties of DyFe 0.5 Cr 0.5 O 3 , which is known to be a multiferroic system. Magnetic susceptibility and heat capacity data, apart from confirming the occurrence of magnetic transitions at ~ 121 and 13 K in DyFe 0.5 Cr 0.5 O 3 , bring out that the lower transition temperature only is suppressed by rare-earth substitution.Multiferroic behavior is found to persist in Dy 0.4 Ln 0.6 Fe 0.5 Cr 0.5 O 3 (Ln= Er and Gd). There is an evidence for magnetoelectric coupling in all these materials with qualitative differences in its behavior as the temperature is changed across these two transitions. Remnant electric polarization is observed for all the compounds. The most notable observation is that electric polarization is seen to get enhanced as a result of rare-earth substitution with respect to that in DyFe 0.5 Cr 0.5 O 3 . Interestingly, similar trend is seen in magnetocaloric effect, consistent with the existence of magnetoelectric coupling. The results thus provide evidence for the tuning of magnetoelectric coupling by rare-earth substitution in this family of oxides.2

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Ferroelectricity in Incommensurate Magnets

Harris

2007

Handbook of Magnetism and Advanced Magnetic Materials

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We review the phenomenology of coupled magnetic and electric order parameters for systems in which ferroelectric and incommensurate magnetic order occur simultaneously. We discuss the role that such materials might play in fabricating novel magnetoelectric devices. Then we briefly review the mean-field description of ferroelectricity and modulated magnetic ordering as a preliminary to analyzing the symmetry of the interaction between the spontaneous polarization and the order parameters describing long-range modulated magnetic ordering. As illustration we show how this formulation provides a phenomenological explanation for the observed phase transitions in Ni 3 V 2 O 8 and TbMnO 3 in which ferroelectric and magnetic order parameters simultaneously become nonzero at a single phase transition. In addition, this approach explains the fact that the spontaneous polarization only appears along a specific crystallographic direction. We analyze the symmetry of the strain dependence of the exchange tensor and show that it is consistent with the macroscopic symmetry analysis. We conclude with a brief discussion of how our approach might be relevant in understanding other systems with coupled magnetic and ferroelectric order, and more importantly, how these principles relate to the search for materials with larger magnetoelectric couplings at room temperature.

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Magnetically Driven Ferroelectric Order inNi3V2O8

Cited by 648 publications

References 17 publications

Magnetic structure and magnetoelectric coupling in bulk and thin filmFeVO4

Magnetic structure and magnetoelectric coupling in bulk and thin filmFeVO4

Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe_0.5Cr_0.5O₃

Ferroelectricity in Incommensurate Magnets

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Magnetically Driven Ferroelectric Order inNi3V2O8

Cited by 648 publications

References 17 publications

Magnetic structure and magnetoelectric coupling in bulk and thin filmFeVO4

Magnetic structure and magnetoelectric coupling in bulk and thin filmFeVO4

Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe0.5Cr0.5O3

Ferroelectricity in Incommensurate Magnets

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Product

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Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe_0.5Cr_0.5O₃