202 citations · 869 across the 12 of their papers we have counts for
11 papers · 1 filter
Distinct magnetic phase transition at the surface of an antiferromagnet
Sean Langridge, Gavin M. Watson, Doon Gibbs +6
In the majority of magnetic systems the surface is required to order at the same temperature as the bulk. In the present study, we report a distinct and unexpected surface magnetic…
Resonant x-ray diffraction study of the magnetoresistant perovskite Pr0.6Ca0.4MnO3
S. Grenier, J. P. Hill, Doon Gibbs +8
We report a x-ray resonant diffraction study of the perovskite Pr0.6Ca0.4MnO3. At the Mn K-edge, this technique is sensitive to details of the electronic structure of the Mn atoms.…
Substrate-induced strain effects on Pr_{0.6}Ca_{0.4}MnO_{3} films
C. S. Nelson, J. P. Hill, Doon Gibbs +11
We report the characterization of the crystal structure, low-temperature charge and orbital ordering, transport, and magnetization of Pr_{0.6}Ca_{0.4}MnO_{3} films grown on LaAlO_{…
Coherent X-ray Scattering from Manganite Charge and Orbital Domains
C. S. Nelson, J. P. Hill, Doon Gibbs +5
We report coherent x-ray scattering studies of charge and orbital domains in manganite systems. The experiments were carried out on LaMnO_3 and Pr_{0.6}Ca_{0.4}MnO_3, with the inci…
Orbital Correlations in Doped Manganites
J. P. Hill, C. S. Nelson, M. v. Zimmermann +12
We review our recent x-ray scattering studies of charge and orbital order in doped manganites, with specific emphasis on the role of orbital correlations in Pr_1-xCa_xMnO_3. For x=…
A Resonant X-ray Scattering Study of Octahedral Tilt Ordering in LaMnO and PrCaMnO
M. v. Zimmermann, C. S. Nelson, Y. -J. Kim +12
We report an x-ray scattering study of octahedral tilt ordering in the manganite series PrCaMnO with x=0.4 and 0.25 and in LaMnO. The sensitivity to tilt orderi…
Correlated Polarons in Dissimilar Perovskite Manganites
C. S. Nelson, M. v. Zimmermann, J. P. Hill +10
We report x-ray scattering studies of broad peaks located at a (0.5 0 0)/(0 0.5 0)-type wavevector in the paramagnetic insulating phases of La_{0.7}Ca_{0.3}MnO_{3} and Pr_{0.7}Ca_{…
X-ray Resonant Scattering Studies of Orbital and Charge Ordering in PrCaMnO
M. v. Zimmermann, C. S. Nelson, J. P. Hill +10
We present the results of a systematic x-ray scattering study of the charge and orbital ordering in the manganite series PrCaMnO with =0.25, 0.4 and 0.5. The tem…
X-ray Anomalous Scattering Study of a Charge-Ordered State in NaV2O5
H. Nakao, K. Ohwada, N. Takesue +9
Charge ordering of V4+ and V5+ in NaV2O5 has been studied by an X-ray diffraction technique using anomalous scattering near a vanadium K-absorption edge to critically enhance a con…
Spin Dynamics and Orbital State in LaTiO_3
B. Keimer, D. Casa, A. Ivanov +6
A neutron scattering study of the Mott-Hubbard insulator LaTiO (T K) reveals a spin wave spectrum that is well described by a nearest-neighbor superexchange con…
Interplay between charge, orbital and magnetic order in Pr_{1-x}Ca_xMnO_3
M. v. Zimmermann, J. P. Hill, Doon Gibbs +6
We report resonant x-ray scattering studies of charge and orbital order in Pr_{1-x}Ca_{x}MnO_3 with x=0.4 and 0.5. Below the ordering temperature, T_O=245 K, the charge and orbital…