Study of spin-ordering and spin-reorientation transitions in hexagonal manganites through Raman spectroscopy

Chen, Xiang‐Bai; Hiền, Nguyễn Thị Minh; Han, Kiok; Nam, Ji Yeon; Huyen, Nguyen Thi; Shin, Seong Il; Wang, Xueyun; Cheong, Sang‐Wook; Lee, Daesu; Noh, Tae Won; Sung, N. H.; Cho, B. K.; Yang, In Sang

doi:10.1038/srep13366

Cited by 16 publications

(12 citation statements)

References 39 publications

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“…11 This technique makes it possible to record even minor crystal structure variations and to reveal the character of ion bonds, which can arise from magnetic ordering and magnetoelectric polarization. 12,13 The features of the huntite vibrational spectrum caused by the magnetic phase transitions have been studied. Adem et al 14 studied Raman spectra of the TbFe 3 (BO 3 ) 4 crystal.…”

Section: Introductionmentioning

confidence: 99%

Manifestation of magnetoelastic interactions in Raman spectra of Ho_xNd1−_xFe₃(BO₃)₄ crystals

et al. 2018

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Raman spectra of Ho[Formula: see text]NdxFe(BO3)4 ([Formula: see text], 0.75, 0.5, 0.25) have been studied in temperature range 10–400[Formula: see text]K. Two compositions ([Formula: see text], [Formula: see text]) demonstrate structural phase transition with soft mode restoration. The addition of Nd atoms increases interatomic spacing and decreases the temperature of structural phase transition. The solid solutions ([Formula: see text], 0.5, 0.25) demonstrate the emergence of the peaks corresponding to magnetoelastic interaction below Néel temperature. The order parameter of the magnetic phase transition has been determined. The equal concentrations of holmium and neodymium atoms prevent magnon soft modes condensation caused by exchange interactions in Fe–O–Fe chains are observed. Calculations confirm the data obtained in the experiment.

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Section: Introductionmentioning

confidence: 99%

Manifestation of magnetoelastic interactions in Raman spectra of Ho_xNd1−_xFe₃(BO₃)₄ crystals

et al. 2018

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“…In addition to the anomalously broad linewidth of spin wave in a single magnetic material, our recent studies showed anomalous behaviors of spin wave linewidth and lineshape between LuMnO 3 single crystal and HoMnO 3 thin film [87,89]. The spin wave linewith is much broader and the lineshape is much more asymmetric in single crystal comparing with that in thin film.…”

Section: Broad Linewidthmentioning

confidence: 90%

“…In recent years, magnetic excitations in magnetoelectric multiferroics have been attracted much research interests [76][77][78][79][80][81][82][83][84][85][86][87][88][89]. The magnetic excitations in multiferroic hexagonal manganites have been systematically investigated through resonance and polarization Raman scattering experiments [81,82,87,89]. The resonance Raman scattering study indicated that the spin wave scattering in hexagonal manganites can be selectively excited with red lasers, which is correlated with the resonance condition of on-site Mn d-d transition (more details of resonance selection is discussed in section 4) [82].…”

Section: Anti-stokes To Stokes Intensity Ratiomentioning

confidence: 99%

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

et al. 2019

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Magnonics, an emerging research field, aims to control and manipulate spin waves in magnetic materials and structures. However, the current understanding of spin waves remains quite limited. This review attempts to provide an overview of the anomalous behaviors of spin waves in various types of magnetic materials observed thus far by inelastic light scattering experiments. The anomalously large asymmetry of anti-Stokes to Stokes intensity ratio, broad linewidth, strong resonance effect, unique polarization selection, and abnormal impurity dependence of spin waves are discussed. In addition, the mechanisms of these anomalous behaviors of spin waves are proposed. spectroscopy is applied for studying vibrational properties of materials. However, due to the anomalous behaviors of spin wave scattering comparing with vibrational scattering, Raman spectroscopy study of spin wave is difficult and limited. In this paper, we present a review of anomalous behaviors of spin waves observed by inelastic light scattering experiments, especially by Raman spectroscopy. The large asymmetry of anti-Stokes to Stokes intensity ratio, broad linewidth, strong resonance effect, unique polarization selection, and abnormal impurity dependence of spin waves are discussed, and a proposed model for the mechanisms of spin flip, spin relaxing, and spin wave scattering is presented for understanding these anomalous behaviors of spin waves. In addition, two magnonic crystal structures are proposed for manipulating spin waves through analyses of the abnormal impurity dependence of spin waves. The review of the anomalous behaviors of spin waves and the proposed models provide the directions for easier experimental study of spin waves by inelastic light scattering, which will be useful for raising the research efforts for investigating spin waves. This is important for the emerging research of magnonics, which has received extensive interests in the modern magnetism research community.

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“…Raman selection rule can help establish the excitations of the magnetic origin with high resolution 22 , 23 . Previous Raman studies show that the spin excitations strongly correlated with a particular electronic transition are observed in hexagonal R MnO 3 below the T N 24 – 28 . Spin excitations of relatively high energy (~ 0.1 eV) are optically excited in the hexagonal R MnO 3 system through the resonance with the Mn d – d transition 24 , 28 – 30 .…”

Section: Introductionmentioning

confidence: 93%

Angularly quantized spin rotations in hexagonal LuMnO3

Kim

Nam

et al. 2022

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Optical control of the spin degree of freedom is often desired in application of the spin technology. Here we report spin-rotational excitations observed through inelastic light scattering of the hexagonal LuMnO3 in the antiferromagnetically (AFM) ordered state. We propose a model based on the spin–spin interaction Hamiltonian associated with the spin rotation of the Mn ions, and find that the spin rotations are angularly quantized by 60°, 120°, and 180°. Angular quantization is considered to be a consequence of the symmetry of the triangular lattice of the Mn-ion plane in the hexagonal LuMnO3. These angularly-quantized spin excitations may be pictured as isolated flat bubbles in the sea of the ground state, which may lead to high-density information storage if applied to spin devices. Optically pumped and detected spin-excitation bubbles would bring about the advanced technology of optical control of the spin degree of freedom in multiferroic materials.

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Study of spin-ordering and spin-reorientation transitions in hexagonal manganites through Raman spectroscopy

Cited by 16 publications

References 39 publications

Manifestation of magnetoelastic interactions in Raman spectra of Ho_xNd1−_xFe₃(BO₃)₄ crystals

Manifestation of magnetoelastic interactions in Raman spectra of Ho_xNd1−_xFe₃(BO₃)₄ crystals

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

Angularly quantized spin rotations in hexagonal LuMnO3

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Study of spin-ordering and spin-reorientation transitions in hexagonal manganites through Raman spectroscopy

Cited by 16 publications

References 39 publications

Manifestation of magnetoelastic interactions in Raman spectra of HoxNd1−xFe3(BO3)4 crystals

Manifestation of magnetoelastic interactions in Raman spectra of HoxNd1−xFe3(BO3)4 crystals

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

Angularly quantized spin rotations in hexagonal LuMnO3

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Product

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Manifestation of magnetoelastic interactions in Raman spectra of Ho_xNd1−_xFe₃(BO₃)₄ crystals

Manifestation of magnetoelastic interactions in Raman spectra of Ho_xNd1−_xFe₃(BO₃)₄ crystals