In this review the dielectric properties of relaxor ferroelectrics are discussed and compared withthe properties of normal dielectrics and ferroelectrics. We try to draw a general picture ofdielectric relaxation start...In this review the dielectric properties of relaxor ferroelectrics are discussed and compared withthe properties of normal dielectrics and ferroelectrics. We try to draw a general picture ofdielectric relaxation starting from a textbook review of the underlying concepts and pay attentionto common behavior of relaxors rather than to the features observed in specific materials. We hopethat this general approach is beneficial to those physicists, chemists, material scientists and deviceengineers who deal with relaxors. Based on the analysis of dielectric properties, a comprehensivedefinition of relaxors is proposed: relaxors are defined as ferroelectrics in which the maximum inthe temperature dependence of static susceptibility occurs within the temperature range ofdielectric relaxation, but does not coincide with the temperature of singularity of relaxation timeor soft mode frequency.展开更多
Dielectrics form an important class of functional materials with unique electric and electronic properties,which are widespread in advanced technologies,but,surprisingly,at the time of the creation of Journal of Advan...Dielectrics form an important class of functional materials with unique electric and electronic properties,which are widespread in advanced technologies,but,surprisingly,at the time of the creation of Journal of Advanced Dielectrics(JAD)there was no journal specially dedicated to the study of these materials.JAD was intended to fill the gap.It was conceived as a forum for the interdisciplinary community of physicists,chemists,material scientists and electrical engineers working with dielectrics and related materials and phenomena.Our journal is published by the largest international scientific publisher in the Asia-Pacific region,World Scientific,and sponsored by the International Centre for Dielectric Research(ICDR)at Xi’an Jiaotong University(XJTU),China.展开更多
文摘In this review the dielectric properties of relaxor ferroelectrics are discussed and compared withthe properties of normal dielectrics and ferroelectrics. We try to draw a general picture ofdielectric relaxation starting from a textbook review of the underlying concepts and pay attentionto common behavior of relaxors rather than to the features observed in specific materials. We hopethat this general approach is beneficial to those physicists, chemists, material scientists and deviceengineers who deal with relaxors. Based on the analysis of dielectric properties, a comprehensivedefinition of relaxors is proposed: relaxors are defined as ferroelectrics in which the maximum inthe temperature dependence of static susceptibility occurs within the temperature range ofdielectric relaxation, but does not coincide with the temperature of singularity of relaxation timeor soft mode frequency.
文摘Dielectrics form an important class of functional materials with unique electric and electronic properties,which are widespread in advanced technologies,but,surprisingly,at the time of the creation of Journal of Advanced Dielectrics(JAD)there was no journal specially dedicated to the study of these materials.JAD was intended to fill the gap.It was conceived as a forum for the interdisciplinary community of physicists,chemists,material scientists and electrical engineers working with dielectrics and related materials and phenomena.Our journal is published by the largest international scientific publisher in the Asia-Pacific region,World Scientific,and sponsored by the International Centre for Dielectric Research(ICDR)at Xi’an Jiaotong University(XJTU),China.
