Erratum: Extraordinarily large intrinsic magnetodielectric coupling of the Tb member within the Haldane spin-chain family 
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 [Phys. Rev. B 96, 014418 (2017)]

Upadhyay, Sanjay Kumar; Paulose, P. L.; Sampathkumaran, E. V.

doi:10.1103/physrevb.99.099902

Cited by 8 publications

(14 citation statements)

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“…Another example is a family of Haldane spin-chain R2BaNiO5 magnets with different rare-earth ions (R = Gd, Dy, Ho, Tb, and Er). The correlation between the Neel temperature and magnetodielectric response near the transition to the magnetoelectric phase was reported in [9], where the single-ion anisotropy of a rare-earth ion was shown to be responsible for the magnetodielectric effect in these compounds. The correlation between the magnetoanisotropic and magnetodielectric properties was found in the Cu3B2O6 compound [10].…”

Section: Introductionmentioning

confidence: 90%

Magnetic and thermodynamic properties and spin-flop-driven magnetodielectric response of the antiferromagnetic Pb2Fe2Ge2O9 single crystals

Pankrats

Balaev

Nikitin

et al. 2019

Journal of Magnetism and Magnetic Materials

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Orthorhombic Pb2Fe2Ge2O9 antiferromagnetic single crystals have been synthesized by a modified pseudo-flux technique and their magnetic, thermodynamic, and magnetodielectric properties have been investigated. It has been found that, below the Neel temperature (45.2 K), iron moments are arranged in a canted antiferromagnetic structure with a weak ferromagnetic moment parallel to the a axis. According to the specific heat measurement data, the TN value remains invariable in applied magnetic fields of up to 5 T within the experimental accuracy. The magnetic entropy in the investigated crystals attains 2Rln(2S+1) right above TN, which is indicative of a purely magnetic nature of the transition. It has been shown that the weak ferromagnetic moment is induced by the interplay between the single-ion anisotropy and antisymmetric Dzyaloshinskii-Moriya exchange interaction, with the latter contribution being dominant. It has been established from the angular dependences of the magnetization in three orthorhombic planes that the symmetries of the magnetic and crystal structure are identical. The magnetodielectric properties of the Pb2Fe2Ge2O9 single crystals have been studied at different mutual orientations of the electric and magnetic fields. The most prominent anomalies have been observed in the vicinity of the spin-flop transition in a magnetic field applied along the c axis.

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Section: Introductionmentioning

confidence: 90%

Magnetic and thermodynamic properties and spin-flop-driven magnetodielectric response of the antiferromagnetic Pb2Fe2Ge2O9 single crystals

Pankrats

Balaev

Nikitin

et al. 2019

Journal of Magnetism and Magnetic Materials

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“…The Haldane-chain oxides, R2BaNiO5, form another family, where strong 3d-4f correlation exist via Ni-O-R-O-Ni super-exchange paths, and recently have received considerable attention with respect to multiferroicity and ME coupling. [20][21][22][23][24][25] In this series, magnetism-induced ferroelectricity with strong ME coupling is proposed for Dy2BaNiO5, 21 whereas ferroelectricity is observed at temperatures well above long-range ordering for many other members (R= Ho, Er, etc.). 20,22 The light rare-earth Nd-member does neither exhibit ferroelectricity nor ME coupling.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of magnetodielectric coupling in 6H-perovskites Ba3RRu2O9 for heavier rare-earth cations ( R=Ho<

Basu

Caignaert

Ghara³

et al. 2019

Phys. Rev. Materials

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The role of rare-earth (R) ions on the magnetodielectric (MD) coupling is always intriguing and markedly different for different systems. Although many reports are available concerning this aspect in frustrated 3dtransition metal oxides, no such reports exist on higher d (4d/5d)-orbital based systems due to the rare availability of highly insulating 4d/5d-systems. Here, we systematically investigated the magnetic, dielectric, ferroelectric and magnetodielectric behavior of the 6H-perovskites Ba3RRu2O9 for different R-ions, namely, R= Sm, Tb and Ho, which magnetically order at 12, 9.5 and 10.2 K respectively. For R=Tb and Ho, the temperature and magnetic-field dependent complex dielectric constant traces the magnetic features, which manifests MD coupling in this system. A weak magnetic-field (H) induced transition is observed for ~30 kOe, which is clearly captured in H-dependent dielectric measurements. No MD coupling is observed for Ba3SmRu2O9. The MD coupling is enhanced by a factor of 3 and 20 times for R=Tb and Ho, respectively, when compared to that of the Nd-counterpart. These results evidence the gradual enhancement of MD coupling with the introduction of heavier R-ions in this series, which is attributed to their larger moment values. Our investigation establishes dominating 4d(Ru)-4f(R) magnetic correlation in this series for the heavier R-members.

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“…The conclusion is based on the neutron powder diffraction (NPD) studies on Tb2BaNiO5 (space group: Immm, see Ref. 27 for crystal structure), which was shown to be an 'exotic' multiferroic below 25 K recently [26]. Density functional theoretical (DFT) calculations were carried out to support canted magnetic ground state, derived from NPD.…”

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Existence of a critical canting angle of magnetic moments to induce multiferroicity in the Haldane spin-chain system Tb2BaNiO5

et al. 2019

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We report an unusual canted magnetism due to 3d and 4f electrons, occupying two different crystallographic sites, with its consequence to electric dipole order. This is based on neutron powder diffraction measurements on Tb2BaNiO5 (orthorhombic, Immm centrosymmetric space group), exhibiting Néel order below (TN=) 63 K, to understand multiferroic behavior below 25 K. The magnetic structure is made up of Ni and Tb magnetic moments, which are found to be mutually canted in the entire temperature range below TN, though collinearity is seen within each sublattice, as known in the past. First-principles density functional theory calculations (GCA+SO and GGA+U+SO approximations) support such a canted ground state. The intriguing finding, being reported here, is that there is a sudden increase in this Tb-Ni relative canting angle at the temperature (that is, at 25 K) at which spontaneous electric polarization sets in, with bond distance and bond angle anomalies. This finding emphasizes the need for a new spin-driven polarization mechanismthat is, a critical canting angle coupled with exchangestriction -to induce multiferroicity in magnetic insulators with canted spins.

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Erratum: Extraordinarily large intrinsic magnetodielectric coupling of the Tb member within the Haldane spin-chain family R2BaNiO5 [Phys. Rev. B 96, 014418 (2017)]

Abstract: The change in electric polarization P, plotted in Fig. 4(b), has to be multiplied by 10. This correction does not influence the interpretation and conclusion of the paper.

Cited by 8 publications

References 0 publications

Magnetic and thermodynamic properties and spin-flop-driven magnetodielectric response of the antiferromagnetic Pb2Fe2Ge2O9 single crystals

Magnetic and thermodynamic properties and spin-flop-driven magnetodielectric response of the antiferromagnetic Pb2Fe2Ge2O9 single crystals

Enhancement of magnetodielectric coupling in 6H-perovskites Ba3RRu2O9 for heavier rare-earth cations ( R=Ho<

Existence of a critical canting angle of magnetic moments to induce multiferroicity in the Haldane spin-chain system Tb2BaNiO5

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