Thermal Conductivity and Magnon-Phonon Resonant Interaction in Antiferromagnetic Fe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cl</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Laurence, G.; Petitgrand, D.

doi:10.1103/physrevb.8.2130

Cited by 55 publications

(16 citation statements)

References 32 publications

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“…Because of the coupling between off diagonal spin components, V contains as well linear terms in the spin-wave operators. In the magnetically ordered phase, these linear terms are known to give rise to a resonant interaction and in turn to the hybridization of the phonon and the spin waves [24,28]. For simplicity, we consider here only the coupling with the studied transverse phonon branch and obtain the following Hamiltonian: H 0 H q a q a q V, where q corresponds to the 200 K phonon dispersion deduced from experiments.…”

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confidence: 99%

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Spin Phonon Coupling in Hexagonal MultiferroicYMnO3

et al. 2007

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Inelastic neutron scattering measurements have been performed on YMnO3, aiming to study the interplay between spin and lattice degrees of freedom in this hexagonal multiferroic material. Our study provides evidence for a strong coupling between magnons and phonons, evidenced by the opening of a gap below T(N) in the dispersion of the transverse acoustic phonon mode polarized along the ferroelectric axis. The resulting upper phonon branch is found to lock on one of the spin-wave modes. These findings are discussed in terms of a possible hybridization between the two types of elementary excitations.

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confidence: 99%

“…Indeed, in these materials, a valuable interpretation of both anomalous behavior of the thermal conductivity [24] and neutron scattering data [25,26] has been proposed on the basis of single-ion magnetostriction, arising from modulation of the crystalline field by the motion of nonmagnetic ions [27]. @r .…”

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Spin Phonon Coupling in Hexagonal MultiferroicYMnO3

et al. 2007

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“…Some clues can be found by considering, for example, similarities of the present experiments with ferrous halides [26]. Indeed, in these materials, a valuable picture of both anomalous behaviour of the thermal conductivity [27] and neutron scattering data [28,29] has been proposed on the basis of single-ion magnetostriction, arising from modulation of the crystalline field by the motion of nonmagnetic ions [30]. This interaction couples the spins and the atomic displacements via the local deformation, being in turn linear in the creation and annihilation of phonon operators.…”

Section: Introductionmentioning

confidence: 96%

“…In addition, it involves products of two off-diagonal spin components, giving rise to linear terms in the spin wave operators as well. In the magnetically ordered phase, these linear terms are known to give rise to a resonant interaction and in turn to the hybridization of the phonon and the spin waves [27,31]. In the case of YMnO 3 , considering only the coupling with the studied transverse phonon branch, the model basically predicts the hybridization between the phonon and the spin wave mode 3.…”

Section: Introductionmentioning

confidence: 98%

Spin lattice coupling in multiferroic hexagonal YMnO3

Petit¹,

Pailhés²,

Fabrèges³

et al. 2008

Pramana - J Phys

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Aiming to shed light on the possible existence of hybrid phonon-magnon excitations in multiferroic manganites, neutron scattering measurements have been undertaken at LLB and ILL on the particular case of hexagonal YMnO3. Our experiments focused on a transverse acoustic phonon mode polarized along the ferroelectric axis. The neutron data show that below the magnetic transition, this particular phonon mode splits in two different branches. The upper branch is found to coincide with a spin wave mode. This manifestation of a strong spin-lattice coupling is discussed in terms of a possible hybridization between the two types of elementary excitations, the phonon and magnons.

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“…Introduction. -The magneto-elastic coupling associated with the crystalline field has been extensively studied in FeC12-Some original dynamic [1][2][3][4][5][6][7][8] and static [9, 10 and 17] effects due to this coupling have been observed and described by different authors. In this article we predict the existence of some additional static effects due to this coupling.…”

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confidence: 99%