221 citations · 1.3k across the 26 of their papers we have counts for
10 papers · 1 filter
Hydrogen Ordering and New Polymorph of Layered Perovskite Oxyhydrides: Sr2VO4-xHx
Joonho Bang, Satoru Matsuishi, Haruhiro Hiraka +7
Compositionally tunable vanadium oxyhydrides Sr2VO4-xHx (x = 0 - 1) without considerable anion vacancy were synthesized by high-pressure solid state reaction. The crystal structure…
Evidence for anisotropic polar nanoregions in relaxor PMN: A neutron study of the elastic constants and anomalous TA phonon damping
C. Stock, P. M. Gehring, H. Hiraka +6
We use neutron scattering to characterize the acoustic phonons in the relaxor PMN and demonstrate the presence of an anisotropic damping mechanism directly related to short-range,…
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…
Damped Soft Phonons and Diffuse Scattering in 40PMN-60PT
C. Stock, D. Ellis, I. P. Swainson +8
Using neutron elastic and inelastic scattering and high-energy x-ray diffraction, we present a comparison of 40% Pb(MgNb)O-60% PbTiO (PMN-60PT) with pur…
Low Symmetry Phase in (001) BiFeO Epitaxial Constrained Thin Films
Guangyong Xu, H. Hiraka, G. Shirane +3
The lattice of (001)-oriented BiFeO epitaxial thin film has been identified by synchrotron x-ray diffraction. By choosing proper scattering zones containing the fixed (001) ref…
Structural phase transformation and phase boundary/stability studies of field-cooled Pb(Mg1/3Nb2/3O3)-32%PbTiO3 crystals
Hu Cao, Feiming Bai, Jiefang Li +4
Structural phase transformations in (001)-oriented (1-x)Pb(Mg1/3Nb2/3O3)-32%PbTiO3 (PMN-x%PT) crystals have been investigated by x-ray diffraction. A C->T->MC sequence was observed…
3-D mapping of diffuse scattering in PZN-xPT
Guangyong Xu, Z. Zhong, H. Hiraka +1
High energy (67 keV) x-ray diffuse scattering measurements were performed on single crystals of Pb(ZnNb)O-PbTiO (PZN-PT). A novel technique was develo…
Cold neutron scattering study on diffuse and phonon excitations in the relaxor PbMg(1/3)Nb(2/3)O3
H. Hiraka, S. -H. Lee, P. M. Gehring +2
Cold neutron scattering experiments have been performed to explore the energy, temperature, and wave-vector dependence of the diffuse scattering and the transverse acoustic (TA) ph…
Dual structures in PZN-xPT ferroelectric relaxors
Guangyong Xu, H. Hiraka, K. Ohwada +1
We performed x-ray diffraction studies on a series of (1-)Pb(ZnNb)O-PbTiO (PZN-PT) single crystals with different incident photon energies, and the…
Characterization of low-energy magnetic excitations in chromium
H. Hiraka, P. Boni, K. Yamada +3
The low-energy excitations of Cr, i.e. the Fincher-Burke (FB) modes, have been investigated in the transversely polarized spin-density-wave phase by inelastic neutron scattering us…