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8 papers · 2 filters
Oxygen vacancies in N doped TiO2: Experiment and first principle calculations
Abdul K. Rumaiz, J. C. Woicik, E. Cockayne +3
We have determined the electronic and atomic structure of N doped TiO2 using a combination of hard x-ray photoelectron spectroscopy (HAXPES) and first- principles density functiona…
Quantitative nanoparticle structures from ultrafast electron crystallography data
Christopher L. Farrow, Chong-Yu Ruan, Simon J. L. Billinge
We describe the quantitative refinement of nanoparticle structures from gold nanoparticles probed by ultrafast electron crystallography (UEC). We establish the equivalence between…
Direct measurements of the penetration depth in a superconducting film using magnetic force microscopy
E. Nazaretski, J. P. Thibodaux, I. Vekhter +3
We report the local measurements of the magnetic penetration depth in a superconducting Nb film using magnetic force microscopy (MFM). We developed a method for quantitative ex…
Competing orders in PZN-xPT and PMN-xPT relaxor ferroelectrics
Guangyong Xu
Neutron and x-ray scattering studies on relaxor ferroelectric systems Pb(ZnNb)O (PZN), Pb(MgNb)O (PMN), and their solid solutions with PbTiO…
Soft phonon columns on the edge of the Brillouin zone in the relaxor PbMg1/3Nb2/3O3
I. P. Swainson, C. Stock, P. M. Gehring +7
We report lattice dynamical measurements, made using neutron inelastic scattering methods, of the relaxor perovskite PbMg1/3Nb2/3O3 (PMN) at momentum transfers near the edge of the…
A reassessment of the Burns temperature and its relationship to the diffuse scattering, lattice dynamics, and thermal expansion in the relaxor PMN
P. M. Gehring, H. Hiraka, C. Stock +5
We have used neutron scattering techniques to characterize the diffuse scattering and lattice dynamics in single crystals of the relaxor PMN from 10K to 900K. We observed two disti…