Spin-phonon coupling in Y2NiMnO6 double perovskite probed by Raman spectroscopy

Filho, Raimundo Bezerra Macedo; Ayala, A. P.; Paschoal, Carlos William de Araujo

doi:10.1063/1.4804988

Cited by 67 publications

(42 citation statements)

References 38 publications

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“…The anomalous behaviour of the phonon wavenumber has been observed in other perovskites with magnetic transition, which is associated with magnetic ordering induced renormalization of phonon modes and is proportional to spin–spin correlation function ⟨S i . S j ⟩ for the nearest neighbour spin localized at the i th and j th sites.…”

Section: Introductionmentioning

confidence: 84%

Spin–phonon coupling in HoCr_1 − xFe_xO₃ (x = 0 and 0.5) compounds

Kotnana

Sathe

Jammalamadaka

2018

J Raman Spectroscopy

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We report on the temperature dependent Raman scattering studies of polycrystalline HoCr1 − xFexO3 (x = 0 and 0.5) compounds. No signature of phonon mode related to structural phase transition is evident in the investigated temperature range in both the compounds. The thermal evolution of phonon spectra indicates a deviation of B3g(3) mode from the expected anharmonic behaviour below magnetic ordering temperature TN in HoCrO3 compound. This behaviour is attributed to spin–phonon coupling, which is due to the modulation of super exchange integral by lattice vibration. On the other hand, the anomalous behaviour of Ag mode and its line‐width around magnetic ordering in HoCr0.5Fe0.5O3 compound suggest the spin–phonon coupling. Apart from that, a clear deviation of wavenumber pertinent to B2g(1) mode suggests the possibility to observe ferroelectricity in HoCr0.5Fe0.5O3 compound. We believe that the present results would be helpful in obtaining new materials with multiferroicity near room temperature.

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Section: Introductionmentioning

confidence: 84%

Spin–phonon coupling in HoCr_1 − xFe_xO₃ (x = 0 and 0.5) compounds

Kotnana

Sathe

Jammalamadaka

2018

J Raman Spectroscopy

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“…In addition to La2NiMnO6, spin-phonon coupling was already observed in Pr2NiMnO6 (PNMO) 11 , Tb2NiMnO6 (TNMO) 12 and Y2NiMnO6 (YNMO) 13 , all in ceramic samples. In the TNMO case, the authors observed a weak spin-phonon coupling, which could not be observed in the stretching phonon position, as it is usually observed in double perovskite, but just in its linewidth 12 .…”

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confidence: 93%

Role of rare-earth ionic radii on the spin–phonon coupling in multiferroic ordered double perovskites

Filho¹,

Barbosa²,

Reichlová³

et al. 2015

Mater. Res. Express

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In this paper we investigated the influence of the rare-earth ionic radii on the spinphonon coupling in RE2NiMnO6 double perovskites by Raman spectroscopy. Spinphonon in dense Nd2NiMnO6 and Gd2NiMnO6 ceramics were investigated by Raman spectroscopy at low temperatures. The magnitude of the coupling observed in comparison with other isostructural compounds shows that it is not influenced by the rareearth ionic radius, as well as the deviation of the position of the stretching phonon in the ferromagnetic phase with relation to the anharmonic contributions follows a power law.

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“…3,10,11 Recent progress in this field showed that various A site (Lu, Y, and Tb) based double perovskites displayed promising dielectric, magnetic, and magnetodielectric responses. [12][13][14][15] DyMnO 3 , an end member of Dy 2 NiMnO 6 , showed ferroelectricity correlated to the spin-lattice coupling and spiral order of Mn-spins. 16,17 On the other hand, the other end member DyNiO 3 nickelates has been reported to show an unusual antiferromagnetic (AF) order.…”

Section: Introductionmentioning

confidence: 99%