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Polarization Reversals with 90o Domain Walls in Bi4Ti3O12
Makoto Iwata,Ikuo Suzuki,Maeda Masaki,Nohiko Yasuda,Rintaro Aoyagi,Yoshihiro Ishibashi 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.2I
Polarization reversal processes with 90 domain walls under a low-frequency field of 25 mHz were investigated on the ab-plane in the ferroelectric Bi4Ti3O12 crystal by using a polarizing microscope. We found that there are three kinds of modes in the polarization reversal of the a-domain, that is, changes of the width in a-domains, annihilations of needle-like a-domains, and polarization reversals within the a-domain. We point out that the a-domain in the 90 domain wall structure plays an important role in the polarization reversal process under a field along the b direction.X%1