Anisotropic spin-wave excitations in multiferroic 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>BiFeO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>

Zhang, Depei; Dissanayake, Sachith; Winn, Barry; Matsuda, M.; Ito, T.; Fishman, Randy Scott

doi:10.1103/physrevb.105.144426

Cited by 2 publications

(5 citation statements)

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“…This result is consistent with that in Ref. [11], in which the intensity ratio is about 1.5 between 3 and 6 meV. The low-energy excitations below 1 meV were reported to have larger contribution from the in-plane modes [11].…”

Section: Resultssupporting

confidence: 93%

“…The intensities have a maximum around 5 meV. This is consistent with the previous result that shows a broad maximum around 4 meV [11]. The ratio of the NSF and SF intensities is shown in Fig.…”

Section: Resultssupporting

confidence: 92%

“…[11], in which the intensity ratio is about 1.5 between 3 and 6 meV. The low-energy excitations below 1 meV were reported to have larger contribution from the in-plane modes [11]. The ratio of the NSF and SF intensities (I NSF /I SF ) is ∼0.5 at 0.6 meV and gradually increases to ∼1 at 1.5 meV.…”

Section: Resultsmentioning

confidence: 97%

“…Two single magnetic domained crystals with the dimensions of 3ϕ×10 mm 3 were comounted in the (HHL) hex scattering plane, which corresponds to the cycloidal plane approximately. The crystals are the same ones used for the previous neutron polarization analysis [11]. The crystal structure is hexagonal R3c with the lattice parameters of a hex ≈ 5.58 Å and c hex ≈13.86 Å at room temperature [15].…”

Section: Methodsmentioning

confidence: 99%

“…The magnetic excitations were also measured using inelastic unpolarized neutron scattering technique [8,9,10] in order to determine the magnetic exchange interactions and anisotropies. Very recently, the anisotropy of the magnetic excitations have been evaluated using the neutron polarization analysis [11]. The anisotropic magnetic excitations below 6 meV were observed clearly.…”

Section: Introductionmentioning

confidence: 99%

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Neutron polarization analysis of the anisotropic spin wave excitations in multiferroic BiFeO₃

Matsuda

Dissanayake

2023

J. Phys.: Conf. Ser.

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A multiferroic material BiFeO3 shows a cycloidal spin structure below 640 K. Anisotropy of the magnetic excitations below 6 meV was previously studied using neutron polarization analysis (Zhang et al. 2022 Phys. Rev. B 105 144426). The magnetic excitations in and out of the cycloidal plane were separated and compared to those calculated based on the linear spin-wave theory. The overall feature of the observed excitations was found to be consistent with those calculated. Further polarized neutron study with extended energy range has been performed. The anisotropy of the magnetic excitations is present at least up to 15 meV. The out-of-plane mode is constantly more intense by ∼50% than the in-plane mode in the energy range between 3 and 15 meV. The anisotropic excitations in the wide energy range are unexpected since multiple in-plane and out-of-plane modes are mixed at higher energies and the excitations are expected to become more isotropic.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 92%