Synthesis and dielectric-magnetic properties of rare-earth (La, Nd, Sm)-modified Bi4Ti3O12

Tatsuhiro Shigyo, Hajime Kiyono, Junya Nakano, Hidenobu Itoh, Junichi Takahashi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Rare-earth (RE = La, Nd, Sm)-substitution into BiT (Bi4-XRE XTi3O12) was conducted in a composition range of 0 ≤ X ≤ 3.0. BiT powders, into which fixed amounts of RE cations were incorporated, were directly synthesized by low-temperature calcination of coprecipitated precursors. Complete substitution with RE was achieved for samples up to X = 2.5 at 1100°C. Dielectric permittivity (ετ)-temperature curves of the La-2.0, Nd-2.0, and Sm-2.0 ceramics showed ετ maxima in a frequency-dependent manner. The ετ maxima were located at around 540-560°C (at 1 kHz), which corresponded to the transition from the ferroelectric to paraelectric phase. Increasing Nd-substitution from X = 2.0 to 2.5 resulted in a much suppressed ετ maximum at 200-300°C, which may be due to substantial reduction in the structural distortion giving rise to ferroelectricity of the BiT-based phase. The appearance and enhancement of magnetization was found for the Nd- and Sm-substituted BiT samples. They revealed specified magnetization-magnetic field curves with a small hysteresis loop, suggesting the presence of a weak canted antiterromagnetic interaction.

Original languageEnglish
Pages (from-to)7617-7622
Number of pages6
JournalJapanese Journal of Applied Physics
Volume47
Issue number9 PART 2
DOIs
Publication statusPublished - 2008 Sep 19
Externally publishedYes

Fingerprint

Rare earths
Magnetic properties
Substitution reactions
rare earth elements
substitutes
magnetic properties
Magnetization
synthesis
Ferroelectricity
magnetization
ferroelectricity
curves
Hysteresis loops
Calcination
roasting
Ferroelectric materials
Permittivity
Positive ions
hysteresis
ceramics

Keywords

  • BiTiO
  • Cation substitution
  • Curie temperature
  • Magnetization
  • Rare earth

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Synthesis and dielectric-magnetic properties of rare-earth (La, Nd, Sm)-modified Bi4Ti3O12. / Shigyo, Tatsuhiro; Kiyono, Hajime; Nakano, Junya; Itoh, Hidenobu; Takahashi, Junichi.

In: Japanese Journal of Applied Physics, Vol. 47, No. 9 PART 2, 19.09.2008, p. 7617-7622.

Research output: Contribution to journalArticle

Shigyo, Tatsuhiro ; Kiyono, Hajime ; Nakano, Junya ; Itoh, Hidenobu ; Takahashi, Junichi. / Synthesis and dielectric-magnetic properties of rare-earth (La, Nd, Sm)-modified Bi4Ti3O12. In: Japanese Journal of Applied Physics. 2008 ; Vol. 47, No. 9 PART 2. pp. 7617-7622.
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