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Journal Articles

Ferroelectric domain structures in BiFeO$$_{3}$$-BaTiO$$_{3}$$

Kitagawa, Shuji*; Ozaki, Tomoatsu*; Horibe, Yoichi*; Yoshii, Kenji; Mori, Shigeo*

Ferroelectrics, 376(1), p.122 - 128, 2008/00

https://doi.org/10.1080/00150190802440948
 Times Cited Count：17 Percentile：56.12(Materials Science, Multidisciplinary)

Microstructures associated with the ferroelectric (FE) properties in (1-x)BiFeO$$_{3}$$-xBaTiO$$_{3}$$ were investigated mainly by a transmission electron microscopy. It was found that large FE domains in BiFeO$$_{3}$$ changed into complicated FE microdomains with the 20-30 nm width in the x = 0.25 compound. The directions of the spontaneous polarization in each FE microdomains were determined by obtaining dark-field images. Changes of the FE microdomains for x = 0.28 composition as a function of the temperature were also investigated.

Oral presentation

Relationship between local structure and magnetic/dielectric properties in (1-${it x}$)BiFeO$$_{3}$$-${it x}$BaTiO$$_{3}$$

Ozaki, Tomoatsu*; Nishihara, Sadafumi*; Hosokoshi, Yuko*; Tokunaga, Masashi*; Noguchi, Yuji*; Miyayama, Masaru*; Yoshii, Kenji; Mori, Shigeo*

no journal, , 

We have investigated the local structure and physical properties of (1-${it x}$)BiFeO$$_{3}$$-${it x}$BaTiO$$_{3}$$. Electron-diffraction measurements showed the coexistence of magnetic and ferroelectric nano domains at around x=0.35. Dielectric measurements under magnetic field showed the lack of magneto-dielectric effect, indicating a weak correlation between the magnetic and ferroelectric properties. Magnetization-magnetic field curves showed the existence of magnetic nano domains.

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