Search
Search Results
-
Low-frequency optical phonons in SrTiO3 under uniaxial stress
The transition from the quantum paraelectric state to the quantum ferroelectric state is well known to be caused by applying a uniaxial stress along...
-
Raman scattering study of relaxor ferroelectric Pb(Sc1/2Nb1/2)O3 crystals
The effects of B-site ordering and vacancies were studied in the relaxor ferroelectric Pb(Sc 1/2 Nb 1/2 )O 3 (PSN) family by using Raman scattering...
-
Temperature-field phase diagrams in Pb(Zn1/3Nb2/3)O3-8%PbTiO3 II
Dielectric constants as functions of the temperature and the DC biasing fields along the [011] and the [111] directions in cubic coordinates in...
-
Phase structure and piezoelectric properties of Li-modified NKLN lead-free piezoelectric ceramics
Through the low-temperature sintering method, a sintered body with excellent characteristics was produced in an eco-friendly niobate-based...
-
Ordering of the O(2)…D… O(2) bonds near the phase transition in KD3(SeO3)2 single crystals by D nuclear magnetic resonance
Deuterium resonance investigations of KD 3 (SeO 3 ) 2 single crystals have been performed near the phase transition temperature T C . There are two types...
-
Synthesis of lupane triterpenoids with triphenylphosphonium substituents and studies of their antitumor activity
New derivatives of lupane triterpenoids, viz. , 20,29-dihydrobetulinic and 3- epi -20,29-dihydrobetulinic acid derivatives containing...
-
A-site effects on the dielectric and the piezoelectric properties of (Na0.50+x K 0.50−x)(Nb0.55Ta0.45)O3 ceramics
(Na 0.5+ x K 0.5− x )(Nb 0.55 Ta 0.45 )O 3 (NKNT) ceramics prepared by using a solid state process were investigated for various A-site ratios between Na and...
-
Electric field driven phase transition and possible twining quasi-tetragonal phase in compressively strained BiFeO3 thin films
Highly compressively strained BiFeO 3 thin films with different thickness are epitaxially grown on (001) LaAlO 3 substrates and characterized using...
-
A rhombohedral structure-properties relation in Pb-free Bi0.5(Na1−x K x )0.5TiO3 ceramics
A structure-properties relation in Bi 0.5 (Na 1− x K x ) 0.5 TiO 3 ceramics was investigated for K contents ranging from 0 to 20 mol% substituting for Na in...
-
Distribution and source analysis of aluminum in rivers near **’an City, China
To study the status and source of aluminum (Al) contamination, a total of 21 sampling sites along six rivers near **’an City (Shaanxi province,...
-
Electromechanical cracking in ferroelectrics driven by large scale domain switching
Experimental results indicate three regimes for cracking in a ferroelectric double cantilever beam (DCB) under combined electromechanical loading. In...
-
Growth and dc conductivity studies of tripotassium sodium dichromate single crystal
DC electrical conductivity studies were carried out along the three crystallographic axes for tripotassium sodium dichromate (K 3 Na(CrO 4 ) 2 or KNCr)....
-
Effect of the “negative chemical” pressure on the temperatures of phase transitions in the TlInS2 layered crystal
The temperature dependences of the permittivity of TlInS 2(1 − x ) Se 2 x solid solutions have been experimentally investigated in the temperature range...
-
Phase transitions and dielectric relaxation in (1 − x)SrTiO3-xBiFeO3 (0 ≤ x ≤ 0.04)
The dielectric and acoustic properties of (1 − x )SrTiO 3 - x BiFeO 3 (0 ≤ x ≤ 0.04) solid solutions have been studied in the temperature range 10–300 K....
-
Phase states in the Y1 − x Ca x MnO3 solid solution system
The room-temperature stability region of the tetragonal phase in the Y 1 − x Ca x MnO 3 solid solution system has been found for the first time. The...
-
Mean-field theory about the critical size in ferroelectricity
The problem of critical size in ferroelectric crystals and films is considered within the mean-field theory. It is shown that, when the boundary...
-
Influence of polytypism on structural phase transformations in TlGaSe2 crystals
The polytypism is found to have a significant influence on the structural transformation of the crystal lattice of the TlGaSe 2 ferroelectric with...
-
Thermally induced jump-like pulse processes in a strontium barium niobate crystal doped with metal impurities
The specific features of jump-like pulse processes of spontaneous polarization switching in relaxor ferroelectric crystals of strontium barium...
-
Optical and dielectric studies of phase transitions in single crystals of NaNbO3-Gd1/3NbO3 solid solutions
The temperature dependences of the permittivity ɛ and the false-color image patterns obtained by the rotating polarizer method for single crystals of...