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Spin-Phonon Coupling in Ferromagnetic Monolayer Chromium Tribromide.Jul 01, 2017 · For example, magnetic perovskite oxides often undergo structural transitions accompanied by magnetic signatures whose minuteness suggests that the underlying spin-phonon couplings are largely irrelevant. We present an exception to this rule, showing that novel effects can occur as a consequence.Spin Phonon Coupling in Ferromagnetic Monolayer.Jul 17, 2014 · The reduction and later on the enhancement in intensity of E-9 mode indicate the structural distortion induced spin-phonon coupling. This spin-phonon coupling may predict that magnetic property of BiFe 1−x Zr x O 3 samples might increase for x = 0.03–0.07 and then decrease for x = 0.10–0.15 samples. Dec 22, 2017 · The peculiarities of the spin-phonon coupling are consistent with the trends given by density functional theory. The obtained results shed light on the nature of the spin-phonon coupling in antiferromagnetic insulators and can help in developing spintronic devices. The work at UC Riverside was supported as part of the Spins and Heat in. (A) Schematic of our model of ultrafast spin-phonon coupling. Thermal motion of the O 2− ion modulates the superexchange constant J ad of the adjacent a-Fe 3+ and d-Fe 3+ spins, thereby enabling transfer of spin angular momentum between a- and d-spin sublattices.Spin-phonon coupling and improved multiferroic properties of.Spin-phonon coupling coefﬁcients in this important antiferromagnetic material. The use of the second-order phonon scattering and ultraviolet laser excitation (k¼325nm) was essential for over-coming the problem of the optical selection rules and dominance of the two-magnon band in the visi-ble Raman spectrum of NiO. The data shown here are taken on warming. The dashed line indicates normal phonon behavior unperturbed by magnetoelastic coupling according to a Boltzmann sigmoidal model. Deviations below 33 K are due to spin-lattice coupling. The 369 cm −1 phonon has a modest hysteresis above T C (not shown).Spin-induced negative thermal expansion and.In EuO, a promising material for spintronic applications in which a giant spin-phonon interaction is present, this might imply a reduction of the degree of spin polarization in thin films. Therefore, a comprehensive investigation of the lattice dynamics and spin-phonon interaction in EuO films is necessary for practical applications. In these compounds, spin–phonon coupling (SPC) typically plays a crucial role in magnetic fluctuations, magnon dissipation, and ultimately establishing long-range ferromagnetic order. How- ever, a systematic understanding of SPC in 2D magnets that combines theory and experiment is still lacking. Jan 14, 2016 · Based on the recent observation of spin-phonon coupling in the osmium oxide, the team found that the coupling was the strongest ever observed. The strong spin-phonon coupling may be caused by the.Strong Spin-Phonon Coupling in Two-Dimensional Magnetic.Iors of this phonon in ZnCr 2O 4 and CdCr 2O 4 will be ex-plained as a consequence of the spin-phonon coupling effects on their different magnetic order. Figure 3 a shows the temperature dependence of the fre-quency of the lowest energy IR active phonon. This phonon also shows anomalous softening below 100 K, the frequency shifts by 1.5 cm−1. Nov 10, 2011 · The spin dynamics of a single Mn atom in a laser driven CdTe quantum dot is addressed theoretically. Recent experimental results [Gall et al., Phys. Rev. Lett. 102, 127402 (2009); Goryca et al., Phys. Rev. Lett. 103, 087401 (2009); Gall et al., Phys. Rev. B 81, 245315 (2010)] show that it is possible to induce Mn spin polarization by means of circularly polarized optical pumping. Pumping is.Spin-phonon coupling in multiferroic RCrO3 (R-Y, Lu, Gd, Eu.Oct 01, 2021 · where ω 0 is the phonon frequency at absolute zero temperature, ω qh represents the quasi-harmonic contribution, ω anh corresponds to the contribution from phonon–phonon interaction, ω el-ph and ω sp-ph are the electron–phonon and the spin–phonon coupling effect. As VOCl is a insulator, there is no electron–phonon coupling effect.Spin-phonon coupling and dynamic zero-field splitting contributions to.Jul 14, 2021 · The results on the frustrated J 1 − J 2 Heisenberg model on one- and two-dimensional (square) lattices show that, while a valence-bond crystal is prone to lattice distortions, a gapless spin liquid is stable for small spin-phonon couplings. In view of the ubiquitous presence of lattice vibrations, our results are particularly important to. The spin–phonon coupling is absent for the magnetic ordering of iron alone but emerges with the additional ordering of the samarium spins. Intriguingly, this ordering is not spontaneous but induced.Spin-phonon coupling in frustrated magnet CdCr2O4.Here we consider such a material, the 5dperovskite NaOsO3, and observe a coupling between spin and phonon manifested in a frequency shift of 40 cm−1, the largest measured in any material. The anomalous modes are shown to involve solely Os-O interactions and magnetism is revealed as the driving microscopic mechanism for the phonon renormalization. In this paper, we present the spin-phonon coupling and dielectric response of nano-crystalline Pr 2 CoMnO 6 employing Raman and dielectric spectroscopic study. Pr 2 CoMnO 6 is a manganite compound , it undergoes a paramagnetic to ferromagnetic (PM-FM) phase transition around T c ∼ 172 K. Temperature-dependent Raman scattering experiment is carried out across T c to study the spin-phonon. Jul 03, 2018 · Periodic DFT calculations give energies and symmetries of the phonons. Vibronic-coupling calculations have been performed to understand the behavior of the coupled peaks in the Raman spectra. Current work demonstrates that spin-phonon couplings may be probed by a combination of Raman, far-IR and INS spectroscopies.Spin-phonon coupling in ferrimagnet spinel CoMn 2 O 4.Publisher's Accepted Manuscript: Spin-phonon coupling in antiferromagnetic nickel oxide Citation Details Title: Spin-phonon coupling in antiferromagnetic nickel oxide.Direct spin-phonon coupling with nitrogen-vacancy centers in.The spin–phonon coupling is associated with the modification of the magnetic exchange interactions caused by the ionic motions, and the relevant phonon frequency shifts can be expressed as. In a regime of strong spin–phonon coupling, the magnetization reversal of an individual TbPc 2-SMM via direct transition can induce the excitation of this longitudinal stretching mode phonon on. Apr 30, 2015 · Spin-Phonon coupling Quantum magnets heat transport thermal conductivity Antiferromagnetic Low dimensional Experimental measurements of heat conduction in the low-dimensional antiferromagnetic compounds CuSb2O6 and BiCu2PO6 are presented for the range 0.5K≤T≤390K.Strong spin-lattice coupling in CrSiTe3: APL Materials: Vol 3, No 4.Jul 22, 2022 · Spin-phonon dispersion in magnetic materials. Microscopic coupling between the electron spin and the lattice vibration is responsible for an array of exotic properties from morphic effects in simple magnets to magnetodielectric coupling in multiferroic spinels and hematites. Traditionally, a single spin-phonon coupling constant is used to.Electron-Phonon and Spin-Lattice Coupling in Atomically.Magnetoelectric phase diagrams of the rare-earth (R) Mn perovskites R MnO 3 are theoretically studied by focusing on crucial roles of the symmetric magnetostriction or the Peierls-type spin-phonon coupling through extending our previous work [M. Mochizuki et al., Phys. Rev. Lett. 105, 037205 (2010)].We first construct a microscopic classical Heisenberg model for R MnO 3 including the.. Jun 17, 2022 · Recently, spin-phonon coupling (SPC) has gained considerable attention especially in two-dimensional (2D) materials. Herein, density-functional theory is used to investigate the SPC effect in CrSBr, a recently fabricated 2D magnetic semiconductor. It is found that the phonon vibrations are strongly dependent on the spin ordering. The breaking of magnetic symmetry changes phonon spectrum.Spin-phonon coupling in antiferromagnetic nickel oxide.Spin-phonon coupling effects, as reﬂected in phonon frequency shifts between ferromagnetic (FM) and G-type antiferromagnetic (AFM) conﬁgurations in cubic CaMnO 3,SrMnO 3,BaMnO 3,LaCrO 3, LaFeO 3,and La 2(CrFe)O 6, are investigated using density-functional methods. The calculations are carried out both with a.
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