Infrared-active optical phonons and magnetic excitations in the hexagonal manganites 
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 (
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, Er, Tm, Yb, and Lu)

Basistyy, Roman; Stanislavchuk, T. N.; Sirenko, A. A.; Litvinchuk, A. P.; Kotelyanskii, Michael; Carr, G. L.; Lee, N.; Wang, Xueyun; Cheong, Sang‐Wook

doi:10.1103/physrevb.90.024307

Cited by 20 publications

(17 citation statements)

References 65 publications

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“…[1][2][3][4][5][6] Owing to the different ionic radii of R 3+ (R: rare-earth), RMnO 3 can naturally form two different types of structures: one is a perovskite orthorhombic (R ¼ La-Dy) structure [7][8][9] and the other is a hexagonal (R ¼ Ho-Lu, Y, Sc) structure. [10][11][12][13] In particular, the hexagonal structure RMnO 3 can be stabilized into the perovskite orthorhombic phase for small R 3+ (R ¼ Ho-Lu, Y) ion sizes under high temperature and high pressure.…”

Section: Introductionmentioning

confidence: 99%

First-principles study of the electric, magnetic, and orbital structure in perovskite ScMnO₃

Song

Chen

et al. 2019

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

First-principles study of the electric, magnetic, and orbital structure in perovskite ScMnO₃

Song

Chen

et al. 2019

RSC Adv.

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“…Therefore, the general property of asymmetry of anti-Stokes to Stokes intensity ratio of bulk spin wave scattering should not be correlated with the anomalous asymmetry properties of surface spin wave. 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].…”

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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“…Therefore, longwavelength optical phonons are sensitive to the changes in crystal symmetry and atom positions. The zone center phonon modes in h-RMnO 3 have been studied experimentally (using Raman, THz and IR spectroscopies), as well as theoretically (using shell model and first-principle calculations; Iliev et al, 1997;Litvinchuk et al, 2004;Fukumura et al, 2007;Vermette et al, 2008Vermette et al, , 2010Ghosh et al, 2009;Liu et al, 2012;Toulouse et al, 2014;Goian et al, 2010;Kadlec et al, 2011;Souchkov et al, 2003;Ková cs et al, 2012;Zaghrioui et al, 2008;Basistyy et al, 2014;Rushchanskii & Ležaić, 2012;Varignon et al, 2012).…”

Section: Phononsmentioning

confidence: 99%

“…A recent IR measurement on LuMnO 3 , however, may shed light on this problem, finding 13 E 1 modes out of 14 (Basistyy et al, 2014). Adopting the highest energy mode at 644 cm À1 found in Raman spectroscopy (Vermette et al, 2010), the energies of all the possible E 1 modes were determined.…”

Section: Phononsmentioning

confidence: 99%

“…Moreover, as the mass of Ho is similar to Lu, it is reasonable to assume that the phonon energies of HoMnO 3 are similar to that of LuMnO 3 . Therefore, we can assign the phonon modes of HoMnO 3 to the nearest phonon modes in LuMnO 3 , following the analysis used in Basistyy et al (2014). Note that this mode assignment results in higher phonon energies compared with the shell model calculations, especially for the low-energy modes as shown in Table 1.…”

Section: Phononsmentioning

confidence: 99%

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HexagonalRMnO₃: a model system for two-dimensional triangular lattice antiferromagnets

Sim

Jeong

et al. 2016

Acta Crystallogr B Struct Sci Cryst Eng Mater

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The hexagonal RMnO 3 (h-RMnO 3 ) are multiferroic materials, which exhibit the coexistence of a magnetic order and ferroelectricity. Their distinction is in their geometry that both results in an unusual mechanism to break inversion symmetry and also produces a two-dimensional triangular lattice of Mn spins, which is subject to geometrical magnetic frustration due to the antiferromagnetic interactions between nearest-neighbor Mn ions. This unique combination makes the h-RMnO 3 a model system to test ideas of spin-lattice coupling, particularly when both the improper ferroelectricity and the Mn trimerization that appears to determine the symmetry of the magnetic structure arise from the same structure distortion. In this review we demonstrate how the use of both neutron and X-ray diffraction and inelastic neutron scattering techniques have been essential to paint this comprehensive and coherent picture of h-RMnO 3 .

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Infrared-active optical phonons and magnetic excitations in the hexagonal manganites RMnO3 ( R=Ho , Er, Tm, Yb, and Lu)

Cited by 20 publications

References 65 publications

First-principles study of the electric, magnetic, and orbital structure in perovskite ScMnO₃

First-principles study of the electric, magnetic, and orbital structure in perovskite ScMnO₃

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

HexagonalRMnO₃: a model system for two-dimensional triangular lattice antiferromagnets

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Infrared-active optical phonons and magnetic excitations in the hexagonal manganites RMnO3 ( R=Ho , Er, Tm, Yb, and Lu)

Cited by 20 publications

References 65 publications

First-principles study of the electric, magnetic, and orbital structure in perovskite ScMnO3

First-principles study of the electric, magnetic, and orbital structure in perovskite ScMnO3

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

HexagonalRMnO3: a model system for two-dimensional triangular lattice antiferromagnets

Contact Info

Product

Resources

About

First-principles study of the electric, magnetic, and orbital structure in perovskite ScMnO₃

First-principles study of the electric, magnetic, and orbital structure in perovskite ScMnO₃

HexagonalRMnO₃: a model system for two-dimensional triangular lattice antiferromagnets