Polarization dependence of anomalous x-ray scattering in orbital-ordered manganites

Ishihara, Sumio; Maekawa, Sadamichi

doi:10.1103/physrevb.58.13442

Cited by 62 publications

(39 citation statements)

References 42 publications

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“…This is contrary to a naive picture that the modulation is caused by the 3d states through the intra-atomic Coulomb interaction. 8,9 Subsequent theoretical studies on RXS in YVO 3 and YTiO 3 confirmed that the former picture is still valid. [10][11][12] RXS experiments on magnetic superlattice spots were carried out on several transition-metal compounds with antiferromagnetic ordering, such as RbMnF 3 (Ref.…”

Section: Introductionmentioning

confidence: 88%

Magnetic resonant x-ray scattering at theGaKedge inUGa3: A ban

2004

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Magnetic resonant x-ray scattering (MRXS) at the K edge of Ga in an antiferromagnetic phase of UGa 3 is studied on the basis of a band-structure calculation. With taking into account the spin-orbit interaction, we obtain a strong resonant peak near the K edge of Ga. We find that a relatively large orbital polarization in the unoccupied states of the Ga 4p band is induced by the 5f orbital polarizations at neighboring U atoms through the Ga 4p, and U 5f hybridization, and thereby leading to the large MRXS intensity.

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Section: Introductionmentioning

confidence: 88%

Magnetic resonant x-ray scattering at theGaKedge inUGa3: A ban

2004

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“…As mentioned above, the unit cell of the orbital ordered phase has the dimensions ffiffi ffi 2 p a Â 2 ffiffi ffi 2 p a Â c. As the origin of the anisotropy of the scattering factor, two mechanisms have been proposed; the Coulomb mechanism 21,22) and the JT mechanism. [24][25][26] In the former, the anisotropy of the form factor is attributable to the Coulomb interaction between 3d and 4p electrons.…”

Section: Structure Of the Orbital Ordermentioning

confidence: 99%

“…22) These structure factors are same as eqs. (1) and (2) when we substitute ðf x þ f y Þ=2 for f 3þ and É for 90 .…”

Section: Anisotropic Scattering Factor Tensor At 170 Kmentioning

confidence: 99%

Resonant X-ray Study on the Bi-Layered Perovskite Mn Oxide LaSr₂Mn₂O₇

et al. 2003

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Charge and orbital ordering behaviors in the half doped bi-layered compound LaSr2Mn2O7 have been studied by resonant and non-resonant X-ray scattering. Three different order parameters, which correspond to the A-type antiferromagnetic, a charge and an orbital ordered states, were observed by measuring the magnetostriction and the superlattice peaks characterized by wavevectors (1/2 1/2 0) and (1/4 1/4 0), respectively. The superlattice reflections indicating the charge and orbital ordered states were observed below 210 K. Both the intensities reach a maximum at 160 K on cooling and become very weak below 100 K. The peak width of the charge ordered state agrees with that of the orbital ordered state at all temperatures studied. These results indicate that both the states originate from a single phase and that the charge/orbital ordered islands with definite interfaces disperse in the A-type antiferromagnetic phase. The dimensionality of the charge/orbital ordered phase is discussed using this model.Comment: 9pages, 10 figure

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“…22,34 The value of θ in the present calculation is about π. That is, the orbital wave functions are given by (|d 3z 2 −r 2 ± |d x 2 −y 2 )/ √ 2 where the electronic clouds are more elongated along the z direction in comparison with the d 3x 2 −r 2 and d 3y 2 −r 2 orbitals.…”

mentioning

confidence: 81%

Ferromagnetic insulating phase in Pr1$minus;xCaxMnO3

Kajimoto

2003

Physica B: Condensed Matter

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A ferromagnetic insulating (FM-I) state in Pr0.75Ca0.25MnO3 has been studied by neutron scattering experiment and theoretical calculation. The insulating behavior is robust against an external magnetic field, and is ascribed to neither the phase separation between a ferromagnetic metallic (FM-M) phase and a non-ferromagnetic insulating one, nor the charge ordering. We found that the Jahn-Teller type lattice distortion is much weaker than PrMnO3 and the magnetic interaction is almost isotropic. These features resembles the ferromagnetic metallic state of manganites, but the spin exchange interaction J is much reduced compared to the FM-M state. The theoretical calculation based on the staggered type orbital order well reproduces several features of the spin and orbital state in the FM-I phase.

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Polarization dependence of anomalous x-ray scattering in orbital-ordered manganites

Cited by 62 publications

References 42 publications

Magnetic resonant x-ray scattering at theGaKedge inUGa3: A ban

Magnetic resonant x-ray scattering at theGaKedge inUGa3: A ban

Resonant X-ray Study on the Bi-Layered Perovskite Mn Oxide LaSr₂Mn₂O₇

Ferromagnetic insulating phase in Pr1$minus;xCaxMnO3

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Polarization dependence of anomalous x-ray scattering in orbital-ordered manganites

Cited by 62 publications

References 42 publications

Magnetic resonant x-ray scattering at theGaKedge inUGa3: A ban

Magnetic resonant x-ray scattering at theGaKedge inUGa3: A ban

Resonant X-ray Study on the Bi-Layered Perovskite Mn Oxide LaSr2Mn2O7

Ferromagnetic insulating phase in Pr1$minus;xCaxMnO3

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Product

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Resonant X-ray Study on the Bi-Layered Perovskite Mn Oxide LaSr₂Mn₂O₇