Lattice dynamics of MnO

Haywood, B. C.; Collins, M. F.

doi:10.1088/0022-3719/2/1/306

Cited by 31 publications

(13 citation statements)

References 15 publications

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“…Our result of the transverse optical phonon is also in good agreement with early neutron scattering results, [33][34][35] while it seems that the longitudinal phonon mode has been underestimated by neutron scattering techniques. 34 In Ref.…”

Section: ͑5͒supporting

confidence: 90%

Magnetic-order induced phonon splitting in MnO from far-infrared spectroscopy

et al. 2008

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Detailed far-infrared spectra of the optical phonons are reported for antiferromagnetic MnO. Eigenfrequencies, phonon damping, and effective plasma frequencies are studied as a function of temperature. Special attention is paid to the phonon splitting at the antiferromagnetic phase transition. The results are compared to recent experimental and theoretical studies of the spin-phonon coupling in frustrated magnets, which are explained in terms of a spin-driven Jahn-Teller effect, and to ab initio and model calculations, which predict phonon splitting induced by magnetic order.

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Section: ͑5͒supporting

confidence: 90%

Magnetic-order induced phonon splitting in MnO from far-infrared spectroscopy

et al. 2008

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“…The main difference between green (stoichiometric) and black (defect-reach) bulk NiO was a dramatic increase in the strength of the one-phonon LO mode at 550-560 cm -1 in the black NiO [35]. The origin of phonon bands was interpreted theoretically using the rigid-ion [43]- [46], shell [47], and first principles [42], [48] models. It was also proposed that some nonmagnetic properties of NiO as zonecentre optical phonon frequencies and Born effective charge tensor are substantially noncubic below the Néel temperature, even assuming the ideal rock-salt structure of the oxide [49].…”

Section: Introductionmentioning

confidence: 99%

Magnon and Phonon Excitations in Nanosized NiO

Миронова-Улмане

Kuzmin

Силдос

et al. 2019

Latvian Journal of Physics and Technical Sciences

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Single-crystal, microcrystalline and nanocrystalline nickel oxides (NiO) have been studied by Raman spectroscopy. A new band at ~200 cm−1 and TO-LO splitting of the band at 350–650 cm−1 have been found in the spectra of single-crystals NiO(100), NiO(110) and NiO(111). The Raman spectra of microcrystalline (1500 nm) and nanocrystalline (13–100 nm) NiO resemble those of the single crystals. They all contain the two-magnon band at 1500 cm−1, indicating that the oxides remain at room temperature in the antiferromagnetic phase. Besides, a new sharp Raman band has been observed at 500 cm−1 in nanocrystalline NiO. Its temperature dependence suggests the magnetic origin of the band, possibly associated with the one-phonon–one-magnon excitation at the Brillouin zone centre.

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“…The strange features in the nature and physical properties of TMO in the paramagnetic phase (NaCl Structure) has given an increased interest in the study of their lattice dynamics. The lattice dynamics of MnO, CoO and NiO has been studied in detail by many experimental [7][8][9][10] and theoretical workers [11][12][13][14] with great success. While such studies for FeO (wustite) 15) has met only with moderate success.…”

Section: §1 Introductionmentioning

confidence: 99%

Lattice Dynamics of Transition Metal Oxides-An Application to FeO in the Paramagnetic Phase

Upadhyaya¹,

Upadhyaya²,

Yadav³

2001

J. Phys. Soc. Jpn.

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The basic equations of three-body force shell model have been corrected for the ionic charge parameter Z. This correction also modifies the expressions for the shell and core charge parameters. Our model has been applied to study the phonon dispersion curves, Debye temperatures variation, combined density of states and two-phonon Raman scattering spectra of wustite. This approach has been found successful in interpreting the complete lattice dynamics of FeO only when both the ions are considered to be polarizable. There is good scope for the fresh determination of positive ion polarizability and Debye temperatures variation. It is concluded that the presence of magnetic and anharmonic interactions have no effect on the lattice dynamics of FeO in its paramagnetic phase.

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Lattice dynamics of MnO

Cited by 31 publications

References 15 publications

Magnetic-order induced phonon splitting in MnO from far-infrared spectroscopy

Magnetic-order induced phonon splitting in MnO from far-infrared spectroscopy

Magnon and Phonon Excitations in Nanosized NiO

Lattice Dynamics of Transition Metal Oxides-An Application to FeO in the Paramagnetic Phase

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