Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Tsukada, Shinya*; Fujii, Yasuhiro*; Yoneda, Yasuhiro; Moriwake, Hiroki*; Konishi, Ayako*; Akishige, Yukikuni*
Physical Review B, 97(2), p.024116_1 - 024116_7, 2018/02
Times Cited Count:20 Percentile:68.04(Materials Science, Multidisciplinary)Uniaxial ferroelectric BaTiO with a Curie temperature of 743 K was investigated to clarify its paraelectric-ferroelectric phase transition behavior. The mechanism is discussed on the basis of the structure from short to long ranges determined by synchrotron X-ray diffraction and the lattice dynamics probed by Raman spectroscopy. Using a combination of experimental results and first-principles calculations, we explain the phase transition. Ti vibration of TiO octahedral units is frozen in the ferroelectric phase and the space group changes from nonpolar to polar .