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13 papers · 2 filters
Pressure-Induced Intermediate-to-Low Spin State Transition in LaCoO3
T. Vogt, J. A. Hriljac, N. C. Hyatt +1
Synchrotron X-ray powder diffraction experiments reveal that the transition from a magnetic intermediate spin (IS) state to a nonmagnetic low-spin (LS) ground state in LaCoO3 norma…
Effects of Pressure on Electron Transport and Local Structure of Manganites: Low to High Pressure Regime
Congwu Cui, Trevor A. Tyson, Zhong Zhong +2
The pressure dependence of the resistivity and structure of La0.60Y0.07Ca0.33MnO3 has been explored in the pressure range from 1 atm to ~7 GPa. The metal to insulator transition te…
Development of Ferroelectric Order in Relaxor (1-x)Pb(Mg1/3Nb2/3)O3 - xPbTiO3
Z. -G. Ye, Y. Bing, J. Gao +4
The microstructure and phase transition in relaxor ferroelectric Pb(Mg1/3Nb2/3)O3 (PMN) and its solid solution with PbTiO3 (PT), PMN-xPT, remain to be one of the most puzzling issu…
Neutron Diffraction Study of Field Cooling Effects on Relaxor Ferroelectrics Pb[(Zn_{1/3} Nb_{2/3})_{0.92} Ti_{0.08}] O_{3}
Kenji Ohwada, Kazuma Hirota, Paul W. Rehrig +2
High-temperature (T) and high-electric-field (E) effects on Pb[(Zn_{1/3} Nb_{2/3})_{0.92} Ti_{0.08}]O_3 (PZN-8%PT) were studied comprehensively by neutron diffraction in the ranges…
Mode-coupling and polar nanoregions in the relaxor ferroelectric Pb(Mg1/3Nb2/3)O3
S. Wakimoto, C. Stock, Z. -G. Ye +3
We present a quantitative analysis of the phonon lineshapes obtained by neutron inelastic scattering methods in the relaxor ferroelectric Pb(Mg1/3Nb2/3)O3 (PMN). Differences in the…
"Madelung model" prediction for dependence of lattice parameter on nanocrystal size
Vasili Perebeinos, Siu-Wai Chan, Feng Zhang
The competition between the long range Coulomb attractive and the short range repulsive interaction in ionic nanocrystals creates an effective negative pressure, which causes the l…