Supported by the National Natural Science Foundation of China under Grant Nos 51102210 and 51332006.
Ferroelectric transitions in filled tungsten bronze ceramics Sr4R2Ti4Nb6O30, Sr5RTi3NbT030 (R=La, Nb, Sm & Eu) and Ba4Nd2Ti4Nb6030 are investigated with differential scanning calorimetry (DSC) and the Curie- Weis...
Supported by the National Natural Science Foundation of China under Grant Nos 50234020 and 10274049, tile Key Project of Science and Technology Committee of Shanghai under Grant No 06JC14033, and the Education Committee of Shanghai under Grant No 06LZ01I. The authors would like to thank Dr Wang Hui and Mr Zhang Xiao-Yong for useful discussions and their help in the measurement.
Above Curie temperature, MnBi crystals are aligned in situ along the c-axis in a Bi matrix by a high fabrication magnetic field H f of 10 T. Magnetic testing shows a pronounced anisotropy in magnetization in direction...
the State Key Program for Basic Research of China;the Research Found for the Doctoral Program of Higher Education。
A simple double-well potential model is established.It shows that the nature of the low-frequency dielectric constant in ferroelectrics is the additional hopping of the off-center ions in multi-site potential.The co-o...