M. Blume

Interplay between Charge, Orbital, and Magnetic Order in Pr{sub 1-x}Ca{sub x}MnO{sub 3}

We report resonant x-ray scattering studies of charge and orbital order in Pr{sub 1-x}Ca {sub x}MnO{sub 3} with x=0.4 and 0.5. Below the ordering temperature, T{sub O}=245 K , the charge and orbital order intensities follow the same temperature dependence, including an increase at the antiferromagnetic ordering temperature, T{sub N} . High resolution measurements reveal, however, that long range orbital order is never achieved. Rather, an orbital domain state is formed. Above T{sub O} , the charge order fluctuations are more highly correlated than the orbital fluctuations. We conclude that the charge order drives the orbital order at the transition. (c) 1999 The American Physical Society.

X-ray resonant scattering studies of orbital and charge ordering in Pr 1 − x Ca x MnO 3

We present the results of a systematic x-ray scattering study of the charge and orbital ordering in the manganite series

Polarization analysis of magnetic x‐ray scattering (invited)

{\mathrm{Pr}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}

Interference of fluorescence x rays and coherent excitation of core levels

with

X-ray resonant scattering studies of charge and orbital ordering in Pr1−xCaxMnO3

x=0.25,

Computer Calculations for the Classical Heisenberg Model: Magnetization and Pair Correlation Functions

0.4, and 0.5. The temperature dependence of the scattering at the charge and orbital wavevectors, and of the lattice constants, was characterized throughout the ordered phase of each sample. It was found that the charge- and orbital-order wavevectors are commensurate with the lattice, in striking contrast to the results of electron and neutron diffraction studies of samples with

Gen Shirane's Legacy in Polarized Beam Scattering: From Neutrons to X-rays

x=0.5.

X-ray Resonance Exchange Scattering (XRES)

High-momentum-transfer resolution studies of the

Low temperature spin wave dynamics in classical Heisenberg chains

x=0.4

X-ray resonant scattering studies of orbital and charge ordering in Pr{sub 1-x}Ca{sub x}MnO{sub 3}.

and 0.5 samples further revealed that while long-range charge order is present, long-range orbital order is never established. Above the charge and orbital ordering temperature