Microstructures associated with dielectric and magnetic properties in (1-x)BiFeO3-xBaTiO3

Yoichi Horibe; Maki Nakayama; Yuko Hosokoshi; Tom Asaka; Yoshio Matsui; Toshihiro Asada; Yasumasa Koyama; Shigeo Mori

doi:10.1143/JJAP.44.7148

Microstructures associated with dielectric and magnetic properties in (1-x)BiFeO₃-xBaTiO₃

Yoichi Horibe^*, Maki Nakayama, Yuko Hosokoshi, Tom Asaka, Yoshio Matsui, Toshihiro Asada, Yasumasa Koyama, Shigeo Mori

^*Corresponding author for this work

School of Fundamental Science and Engineering

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

We have investigated microstructures associated with the magnetic and dielectric properties of multiferroic mixed-perovskite compounds of the formula (1-x)BiFeO₃-xBaTiO₃ by transmission electron microscopy (TEM) combined with conventional dielectric and magnetic measurements. TEM observation revealed that there exist complicated ferroelectric (FE) domains 20-30 nm in size in the FE phase of BiFeO₃. It was also found that, in an x = 0.25 compound, a weak spontaneous magnetization appears in the FE phase at 20 K. From the results of the X-ray and electron diffraction experiments, it is suggested that this weak spontaneous magnetization is closely associated with the decrease in the extent of rhombohedral distortion by a partial substitution of BaTiO₃ for BiFeO₃.

Original language	English
Pages (from-to)	7148-7150
Number of pages	3
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	44
Issue number	9 B
DOIs	https://doi.org/10.1143/JJAP.44.7148
Publication status	Published - 2005 Sept 22

Keywords

Ferroelectric domains
Ferroelectricity
Ferromagnetism
Mixed-perovskite compound
Multiferroics
Transmission electron microscopy

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/JJAP.44.7148

Cite this

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title = "Microstructures associated with dielectric and magnetic properties in (1-x)BiFeO3-xBaTiO3",

abstract = "We have investigated microstructures associated with the magnetic and dielectric properties of multiferroic mixed-perovskite compounds of the formula (1-x)BiFeO3-xBaTiO3 by transmission electron microscopy (TEM) combined with conventional dielectric and magnetic measurements. TEM observation revealed that there exist complicated ferroelectric (FE) domains 20-30 nm in size in the FE phase of BiFeO3. It was also found that, in an x = 0.25 compound, a weak spontaneous magnetization appears in the FE phase at 20 K. From the results of the X-ray and electron diffraction experiments, it is suggested that this weak spontaneous magnetization is closely associated with the decrease in the extent of rhombohedral distortion by a partial substitution of BaTiO3 for BiFeO3.",

keywords = "Ferroelectric domains, Ferroelectricity, Ferromagnetism, Mixed-perovskite compound, Multiferroics, Transmission electron microscopy",

author = "Yoichi Horibe and Maki Nakayama and Yuko Hosokoshi and Tom Asaka and Yoshio Matsui and Toshihiro Asada and Yasumasa Koyama and Shigeo Mori",

year = "2005",

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doi = "10.1143/JJAP.44.7148",

language = "English",

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T1 - Microstructures associated with dielectric and magnetic properties in (1-x)BiFeO3-xBaTiO3

AU - Horibe, Yoichi

AU - Nakayama, Maki

AU - Hosokoshi, Yuko

AU - Asaka, Tom

AU - Matsui, Yoshio

AU - Asada, Toshihiro

AU - Koyama, Yasumasa

AU - Mori, Shigeo

PY - 2005/9/22

Y1 - 2005/9/22

N2 - We have investigated microstructures associated with the magnetic and dielectric properties of multiferroic mixed-perovskite compounds of the formula (1-x)BiFeO3-xBaTiO3 by transmission electron microscopy (TEM) combined with conventional dielectric and magnetic measurements. TEM observation revealed that there exist complicated ferroelectric (FE) domains 20-30 nm in size in the FE phase of BiFeO3. It was also found that, in an x = 0.25 compound, a weak spontaneous magnetization appears in the FE phase at 20 K. From the results of the X-ray and electron diffraction experiments, it is suggested that this weak spontaneous magnetization is closely associated with the decrease in the extent of rhombohedral distortion by a partial substitution of BaTiO3 for BiFeO3.

AB - We have investigated microstructures associated with the magnetic and dielectric properties of multiferroic mixed-perovskite compounds of the formula (1-x)BiFeO3-xBaTiO3 by transmission electron microscopy (TEM) combined with conventional dielectric and magnetic measurements. TEM observation revealed that there exist complicated ferroelectric (FE) domains 20-30 nm in size in the FE phase of BiFeO3. It was also found that, in an x = 0.25 compound, a weak spontaneous magnetization appears in the FE phase at 20 K. From the results of the X-ray and electron diffraction experiments, it is suggested that this weak spontaneous magnetization is closely associated with the decrease in the extent of rhombohedral distortion by a partial substitution of BaTiO3 for BiFeO3.

KW - Ferroelectric domains

KW - Ferroelectricity

KW - Ferromagnetism

KW - Mixed-perovskite compound

KW - Multiferroics

KW - Transmission electron microscopy

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