Orbital ordered states inRVO3(R= Y,Tb) studied by a resonant x-ray scattering

Bizen, Daisuke; Shirane, N.; Murata, Tsuyoshi; Nakao, Hironori; Murakami, Youichi; Fujioka, Jun; Yasue, T.; Miyasaka, S.; Tokura, Y.

doi:10.1088/1742-6596/150/4/042010

Cited by 7 publications

(5 citation statements)

References 14 publications

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“…Thus, G-OO can be elucidated by considering the RXS signal at (0 0 1). We also found two kinds of RXS signals at (0 1 1) that show different azimuthal angle dependences, similar to the case of TbVO 3 (Bizen et al, 2009). In our view, these signals reflect the orbital state and the local crystal symmetry.…”

Section: Resultssupporting

confidence: 74%

Resonant X-ray scattering study of perovskite-type vanadate RVO₃

et al. 2010

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The orbital ordering in perovskite-type vanadium oxides, RVO 3 (R: rare earth), has been investigated by resonant X-ray scattering (RXS) near the V K-edge energy. The G-type orbital order, C-type orbital order and orbital disorder phases are elucidated on the basis of the azimuthal-angle and polarization dependence of the RXS signal reflecting the orbital ordering. IntroductionResonant X-ray scattering (RXS) is becoming one of the most powerful tools for studying orbital states in strongly correlated electron systems. Therefore, it is important to understand the origin of RXS signals to determine orbital states; the RXS signal reflects not only the orbital state, but also the structural characteristics (Nakao et al., 2006, and references therein). In RVO 3 , the two valence electrons of V 3+ ions occupy the nearly triply degenerate t 2g orbitals. Hence, the physical properties of RVO 3 are coupled with the orbital and spin states. Two types of orbital orderings have been reported in RVO 3 systems. One is C-type orbital order (C-OO), with an antiferroic arrangement of d xy d yz and d xy d zx in the ab plane and a ferroic arrangement along the c-axis. The other phase is G-type orbital order (G-OO), with an antiferroic arrangement in all the three orthogonal directions. These orbital orderings have been studied by RXS (Noguchi et al., 2000). However, there are some unclear points relating to the interpretation of the observed RXS. In this study, we have systematically investigated RXS near the V K-edge energy on the basis of model calculations and have revaluated the orbital orderings in RVO 3 .

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Section: Resultssupporting

confidence: 74%

Resonant X-ray scattering study of perovskite-type vanadate RVO₃

et al. 2010

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“…Phase II (meV) J ab = 4.24 (21) J ab1 = 0.82(3) J ab2 = 5.99(3) Jc = 5.95 (19) Jc = −1.29(2) K = (−0.48 (12), − 0.06(2), 0) K1 = (0, 0.66(5), 0) K2 = (0, 0, 0.66( 5))…”

Section: Phase III (Mev)mentioning

confidence: 99%

“…One electron occupies the xy orbital, and the other -one of the two doubly-degenerate xz or yz orbitals (or their linear superposition). In LuVO 3 the interplay between spin and orbital physics is responsible for the rich phase diagram indicated by bulk measurements [11,12], as for the well studied YVO 3 [7,[13][14][15][16][17][18][19]. Upon cooling, LuVO 3 first enters an orbitally ordered phase at T OO = 177 K (phase I) followed by magnetic ordering at T SO1 = 105 K (phase II).…”

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confidence: 99%

Jahn-Teller versus quantum effects in the spin-orbital materialLuVO3

et al. 2015

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We report on combined neutron and resonant x-ray scattering results, identifying the nature of the spin-orbital ground state and magnetic excitations in LuVO3 as driven by the orbital parameter. In particular, we distinguish between models based on orbital Peierls dimerization, taken as a signature of quantum effects in orbitals, and Jahn-Teller distortions, in favor of the latter. In order to solve this long-standing puzzle, polarized neutron beams were employed as a prerequisite in order to solve details of the magnetic structure, which allowed quantitative intensity-analysis of extended magnetic excitation data sets. The results of this detailed study enabled us to draw definite conclusions about classical vs quantum behavior of orbitals in this system and to discard the previous claims about quantum effects dominating the orbital physics of LuVO3 and similar systems.

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“…On lowering the temperature, because of a tetragonal distortion of the VO 6 octahedra, the t 2g orbitals split into a doublet of lower energy and singlet of higher energy, resulting in orbital-ordered (OO) , states with anisotropic magnetic interactions that strongly influence the magnetic ground state. It is known that the G-type orbital ordering (G-OO) favors a C-type antiferromagnetic (AFM) ordering (C-AFM), while the C-type orbital ordering (C-OO) results in G-type AFM ordering (G-AFM) due to the coupling between the spin and orbital degrees of freedom. − In all orthovanadates, except for LaVO 3 , the spin ordering takes place following the orbital ordering temperature . Various orbital ordered states, manifested by octahedral tilting, Jahn–Teller distortion, and spin orders are observed, ,,− and even complex electronic and magnetic phases have been reported for smaller R-ions, such as Y, Gd, and Er. , …”

Section: Introductionmentioning

confidence: 99%

Symmetry Origin of the Dzyaloshinskii–Moriya Interaction and Magnetization Reversal in YVO₃

et al. 2021

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We have investigated magneto-structural phase transitions in polycrystalline YVO3 using high-resolution neutron powder diffraction toward understanding the phenomenon of magnetization reversal. Contrary to earlier reports, our study reveals that both C-type and G-type antiferromagnetic ordering, corresponding to G-type and C-type orbital ordered phases, respectively, occur at the same temperature (T N = 115 K) with the G-type antiferromagnetic phase growing at the expense of the C-type one on cooling. These processes cease at T S ∼ 77 K; however, a minor (∼4%) untransformed C-type phase remains unchanged down to 1.7 K. The symmetry analysis indicates different symmetry origins of the Dzyaloshinskii–Moriya interaction in each phase, which can explain the magnetization reversal observed between T N and T S. We discuss that magnetic phase separation and associated weak ferromagnetism may be the common mechanism underlying the magnetization reversal phenomenon observed in other RVO3 systems (R = rare earth).

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Orbital ordered states inRVO₃(R= Y,Tb) studied by a resonant x-ray scattering

Cited by 7 publications

References 14 publications

Resonant X-ray scattering study of perovskite-type vanadate RVO₃

Resonant X-ray scattering study of perovskite-type vanadate RVO₃

Jahn-Teller versus quantum effects in the spin-orbital materialLuVO3

Symmetry Origin of the Dzyaloshinskii–Moriya Interaction and Magnetization Reversal in YVO₃

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Orbital ordered states inRVO3(R= Y,Tb) studied by a resonant x-ray scattering

Cited by 7 publications

References 14 publications

Resonant X-ray scattering study of perovskite-type vanadate RVO3

Resonant X-ray scattering study of perovskite-type vanadate RVO3

Jahn-Teller versus quantum effects in the spin-orbital materialLuVO3

Symmetry Origin of the Dzyaloshinskii–Moriya Interaction and Magnetization Reversal in YVO3

Contact Info

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Orbital ordered states inRVO₃(R= Y,Tb) studied by a resonant x-ray scattering

Resonant X-ray scattering study of perovskite-type vanadate RVO₃

Resonant X-ray scattering study of perovskite-type vanadate RVO₃

Symmetry Origin of the Dzyaloshinskii–Moriya Interaction and Magnetization Reversal in YVO₃