Spin-coupled phonons in multiferroic YbMnO<sub>3</sub>epitaxial films by Raman scattering

Fukumura, Hiroshi; Hasuike, Noriyuki; Harima, Hiroshi; Kisoda, Kenji; Fukae, Kengo; Yoshimura, Takeshi; Fujimura, Norifumi

doi:10.1088/1742-6596/92/1/012126

Cited by 14 publications

(18 citation statements)

References 10 publications

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“…4(a). Similar anomalies have been observed in the thin film and polycrystal samples of YbMnO 3 18,19 and in the isomorphic compounds, HoMnO 3 and YMnO 3 . 25,26 This mode is associated to the relative displacement of Mn and O ions in the a-b plane.…”

Section: Resultssupporting

confidence: 83%

“…To our knowledge the phonon modes of h-YbMnO 3 have been only reported in thin films and in polycrystals. 18,19 The frequencies of the phonon modes at 10 K are reported in Table I and compared to the previous experimental results. The attribution of the direction and sign of atomic displacements in Table I has been based on previous works on the hexagonal RMnO 3 compounds.…”

Section: Resultsmentioning

confidence: 92%

“…The magnetic structure of polycrystalline h-YbMnO 3 samples have been investigated by infrared (IR) 14 , inelastic neutron scattering 15 , Mössbauer spectroscopy 16 and second harmonic generation (SHG) 17 , and the lattice vibrations have been studied in h-YbMnO 3 epitaxial film and polycrystal samples. 18,19 However, measurements on YbMnO 3 single crystals are scarce.…”

Section: Introductionmentioning

confidence: 99%

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Lattice and spin excitations in multiferroic h-YbMnO3

Liu,

Toulouse,

Rovillain

et al. 2012

Preprint

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Lattice and spin excitations have been studied by Raman scattering in hexagonal YbMnO3 single crystals. The temperature dependences of the phonon modes show that the E2 mode at 256 cm −1 related to the displacement of Mn and O ions in a-b plane is coupled to the spin order. The A1 phonon mode at 678 cm −1 presents a soft mode behavior at the Néel temperature. Connected to the motion of the apical oxygen ions along the c direction, this mode controls directly the Mn-Mn interactions between adjacent Mn planes and the superexchange path. Crystal field and magnon mode excitations have been identified. The temperature investigation of the spin excitations shows that the spin structure is strongly influence by the Yb-Mn interaction. Under a magnetic field along the c axis, we have investigated the magnetic reordering and its impact on the spin excitations.

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Lattice and spin excitations in multiferroic h-YbMnO3

Liu,

Toulouse,

Rovillain

et al. 2012

Preprint

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“…The point where two such adjacent curves join can be regarded as the phase transition temperature. [38][39][40] The data in Fig. 8 are modeled with two curves of Eq.…”

Section: Raman Spectroscopy Of Unmodified and Fe-modified Nbtmentioning

confidence: 99%

Structure and properties of Fe-modified Na0.5Bi0.5TiO3at ambient

et al. 2012

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Sodium bismuth titanate (NBT) ceramics are among the most promising lead-free materials for piezoelectric applications. This work reports the crystal structure and phase evolution of NBT and Fe-modified NBT (from 0-2 at% Fe) using synchrotron X-ray diffraction and Raman spectroscopy, both at ambient and elevated temperatures. The crystallographic results are discussed with reference to permittivity and piezoelectric thermal depolarization measurements of the same compositions. Changes in the depolarization temperature due to Fe substitution were detected by Raman spectroscopy, and were found to correlate closely with depolarization temperatures obtained from converse piezoelectric coefficient and permittivity measured in situ. The depolarization temperatures obtained from direct piezoelectric coefficient measured ex situ as well as the phase transition temperatures obtained from synchrotron X-ray diffraction were found to be at higher temperatures. The mechanisms underlying the relationship between permittivity and piezoelectric depolarization to structural transitions observed in Raman spectroscopy and X-ray diffraction are discussed.

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“…Optical studies on YMnO 3 also find clear evidence for coupling between the ferroelectric and antiferromagnetic domain walls [3], with measurements on the related compound HoMnO 3 demonstrating control of the magnetic phase using a static electric field [7]. The microscopic origin of the spin-charge coupling in YMnO 3 has also been investigated in detail using Raman scattering [8][9] and magnetoelastic measurements [6]. Raman studies on YMnO 3 thin films provide evidence for spin-phonon coupling below T N [9], while neutron measurements of spin excitations highlight the importance of magnetoelastic coupling in this system [6].…”

Section: Introductionmentioning

confidence: 99%

Suppression of multiferroic order in hexagonal ceramics

Dixit

Smith

Subramanian

et al. 2010

Solid State Communications

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We have investigated the effects of substituting In for Mn on the antiferromagnetic phase transition in YMnO 3 using magnetic, dielectric, and specific heat measurements. We prepared a set of isostructural phase pure hexagonal YMn 1-x In x O 3 samples having x=0 to x=0.9, which exhibit a systematic decrease of the antiferromagnetic ordering temperature with increasing In content. The multiferroic phase, which develops below T N , appears to be completely suppressed for x≥0.5 in the temperature range investigated, which can be attributed solely to the dilution of magnetic interactions as the crystal structure remains hexagonal. Similar to previous reports, we find an enhancement of the magnetocapacitive coupling on dilution with non-magnetic ions.

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Spin-coupled phonons in multiferroic YbMnO₃epitaxial films by Raman scattering

Cited by 14 publications

References 10 publications

Lattice and spin excitations in multiferroic h-YbMnO3

Lattice and spin excitations in multiferroic h-YbMnO3

Structure and properties of Fe-modified Na0.5Bi0.5TiO3at ambient

Suppression of multiferroic order in hexagonal ceramics

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Spin-coupled phonons in multiferroic YbMnO3epitaxial films by Raman scattering

Cited by 14 publications

References 10 publications

Lattice and spin excitations in multiferroic h-YbMnO3

Lattice and spin excitations in multiferroic h-YbMnO3

Structure and properties of Fe-modified Na0.5Bi0.5TiO3at ambient

Suppression of multiferroic order in hexagonal ceramics

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Product

Resources

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Spin-coupled phonons in multiferroic YbMnO₃epitaxial films by Raman scattering