2013/07/14 by Sergey Prosandeev, S. A. Prosandeev, I. P. Raevski +8
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Atomic physics #Chemistry #Condensation #Condensed matter physics #Dielectric #Diffraction #Ferroelectric and Piezoelectric Materials #Glass properties and applications #Magnesium #Materials science #Metallurgy #Microwave Dielectric Ceramics Synthesis #Neutron diffraction #Optics #Optoelectronics #Permittivity #Phase (matter) #Physics #Quadrupole #Relaxation (psychology) #Thermodynamics #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.4821772
6 figures
arxiv created 2013/07/14 · openalex publication_date 2013/09/25 · arxiv updated 2015/06/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present neutron diffraction, dielectric permittivity, and photoconductivity measurements, evidencing that lead-magnesium niobate experiences a diffuse phase transformation between the spherical glass and quadrupole glass phases, in the temperature interval between 400 K and 500 K, with the quadrupole phase possessing extremely high magnitudes of dielectric permittivity. Our analysis shows that the integral diffuse scattering intensity may serve as an order parameter for this transformation. Our experimental dielectric permittivity data support this choice. These data are important for the applications desiring giant dielectric responses in a wide temperature intervals and not related to electron's excitations.