Erratum: Quasi-two-dimensional antiferromagnet on a triangular lattice<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Rb</mml:mi><mml:mi mathvariant="normal">Fe</mml:mi><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mi mathvariant="normal">Mo</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>[Phys. Rev. B<b>67</b>, 094434 (2003)]

Svistov, L. E.; Смирнов, А. Л.; Prozorova, L. A.; Petrenko, O. A.; Demianets, L. N.; Shapiro, A. B.

doi:10.1103/physrevb.74.139901

Cited by 45 publications

(77 citation statements)

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“…27(d) and (e), coinciding with a first order transition to a commensurate but still long-wavelength magnetically modulated state (revealed by the magnetization curves in Fig. 27(a) and (b)), with a propagation vector of (0, 1/4, 1) [154]. On the other hand, a magnetic field above ~5 Tesla applied along the c-axis causes a single metamagnetic transition, and suppresses the polarization along any crystallographic orientation, as shown in Fig.…”

Section: D Spiral Spin Systemsmentioning

confidence: 81%

Multiferroicity: the coupling between magnetic and polarization orders

Wang

Liu

Ren

2009

Advances in Physics

1,388

598

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[Abstract] Multiferroics, defined for those multifunctional materials in which two or more kinds of fundamental ferroicities coexist, have become one of the hottest topics of condensed matter physics and materials science in recent years. The coexistence of several order parameters in multiferroics brings out novel physical phenomena and offers possibilities for new device functions. The revival of research activities on multiferroics is evidenced by some novel discoveries and concepts, both experimentally and theoretically. In this review article, we outline some of the progressive milestones in this stimulating field, specially for those single phase multiferroics where magnetism and ferroelectricity coexist. Firstly, we will highlight the physical concepts of multiferroicity and the current challenges to integrate the magnetism and ferroelectricity into a single-phase system. Subsequently, we will summarize various strategies used to combine the two types of orders. Special attentions to three novel a) E-mail: liujm@nju.edu.cn b) E-mail: renzh@bc.edu Multiferroics 2 mechanisms for multiferroicity generation: (1) the ferroelectricity induced by the spin orders such as spiral and E-phase antiferromagnetic spin orders, which break the spatial inversion symmetry, (2) the ferroelectricity originating from the charge ordered states, and (3) the ferrotoroidic system, will be paid. Then, we will address the elementary excitations such as electromagnons, and application potentials of multiferroics. Finally, open questions and opportunities will be prospected.

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Section: D Spiral Spin Systemsmentioning

confidence: 81%

Multiferroicity: the coupling between magnetic and polarization orders

Wang

Liu

Ren

2009

Advances in Physics

1,388

598

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“…The comparison with other triangular magnets having antiferromagnetic coupling within the layers is intriguing: (including CsNiBr 3 , RbNiBr 3 , CsMnI 3 , CsMnBr 3 CsCuCl 3 , RbCuCl 3 and RbFe(MoO 4 ) 2 ). There, typically three or six ESR modes [16,17,18] are observed. This is related to the umbrellalike spin order with, for a given triangle, each spin pointing at 120…”

Section: Discussionmentioning

confidence: 99%

Spin excitations in the antiferromagnetNaNiO2

et al. 2007

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In NaNiO2 , Ni 3+ ions form a quasi two dimensional triangular lattice of S = 1/2 spins. The magnetic order observed below 20K has been described as an A type antiferromagnet with ferromagnetic layers weakly coupled antiferromagnetically. We studied the magnetic excitations with the electron spin resonance for frequencies 1-20 cm −1 , in magnetic fields up to 14 T. The bulk of the results are interpreted in terms of a phenomenological model involving bi-axial anisotropy for the spins: a strong easy-plane term, and a weaker anisotropy within the plane. The direction of the easy plane is constrained by the collective Jahn-Teller distortion occurring in this material at 480 K.

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“…The theory presented was for the zero-field case. In fact the theory for H = 0 is non-existent as far as we are aware, and that is essentially because the particular magnetic structure in a field is complex and its origin has not been elucidated, particularly concerning the incommensurate component of the spiral wave vector along the c-axis [42]. See also [43].…”

Section: Mirror Includes Abmentioning

confidence: 99%

Canted-spin-caused electric dipoles: A local symmetry theory

2011

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A pair of magnetic atoms with canted spins Sa, S b can give rise to an electric dipole moment P. Several forms for the behavior of such a moment have appeared in the theoretical literature, some of which have been invoked to explain experimental results found in various multiferroic materials. The forms that require canting of the spins are P1 ∝ R × (Sa × S b ), P2 ∝ Sa × S b , and P3 ∝ SaR · Sa − S b R · S b , where R is the relative position of the atoms and Sa, S b are unit vectors. To unify and generalize these various forms we consider P as the most general quadratic function of the spin components that vanishes whenever Sa and S b are collinear, i.e. we consider the most general expressions that require spin canting. The study reveals new forms. We generalize to the vector P, Moriya's symmetry considerations regarding the (scalar) Dzyaloshinskii-Moriya energy D · Sa × S b (which led to restrictions on D). This provides a rigorous symmetry argument which shows that P1 is allowed no matter how high the symmetry of the atoms plus environment, and gives restrictions for all other contributions. The analysis leads to the suggestion of terms omitted in the existing microscopic models, suggests a new mechanism behind the ferroelectricity found in the 'proper screw structure' of CuXO2, X=Fe,Cr, and predicts an unusual antiferroelectric ordering in the antiferromagnetically and ferroelectrically ordered phase of RbFe(MoO4)2.

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Erratum: Quasi-two-dimensional antiferromagnet on a triangular latticeRbFe(MoO4)2[Phys. Rev. B67, 094434 (2003)]

Cited by 45 publications

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Multiferroicity: the coupling between magnetic and polarization orders

Multiferroicity: the coupling between magnetic and polarization orders

Spin excitations in the antiferromagnetNaNiO2

Canted-spin-caused electric dipoles: A local symmetry theory

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