Achieving Canted-Spin Weak Ferromagnetism and Negative Thermal Expansion in A- and B-Site-Substituted Bismuth Ferrite

BiFeO<sub>3</sub> is the most intensively investigated multiferroic material. It has a cycloidal spin modulation superimposed on G-type antiferromagnetic ordering of Fe<sup>3+</sup> (<i>S</i> = 5/2), which prohibits the appearance of a net magnetization. We found that the simultaneous substitution of Ru<sup>4+</sup> or Ir<sup>4+</sup> for Fe<sup>3+</sup> and Ca<sup>2+</sup> for Bi<sup>3+</sup> suppressed the cycloidal modulation and induced canted weak ferromagnetism at room temperature, while preserving the polar rhombohedral crystal structure. Moreover, the A- and B-site substitutions substantially lowered the ferroelectric transition temperature and resulted in a 1.77% volumetric negative thermal expansion around room temperature. These findings open an avenue for designing new BiFeO<sub>3</sub>-based functional materials.

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Publication Details

Journal
Journal of the American Chemical Society
Published
2025-11-28
DOI
https://doi.org/10.1021/jacs.5c12255
Citations
2
Primary Topic
Thermal Expansion and Ionic Conductivity
Type
article
Field-Weighted Citation Impact
1.04
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article

Achieving Canted-Spin Weak Ferromagnetism and Negative Thermal Expansion in A- and B-Site-Substituted Bismuth Ferrite

Ko Mibu, Takafumi Yamamoto, Takumi Nishikubo, Koomok Lee et al.
2 citations
Journal of the American Chemical Society
Thermal Expansion and Ionic Conductivity
1.04
article

Achieving Canted-Spin Weak Ferromagnetism and Negative Thermal Expansion in A- and B-Site-Substituted Bismuth Ferrite

Ko Mibu, Takafumi Yamamoto, Takumi Nishikubo, Koomok Lee, Ken Hatayama, Shogo Kawaguchi, Jun Miyake, Kei Shigematsu, Shogo Wakazaki, Hena Das, Masaki Azuma, Daiki Ono, Tomoko Onoue, Yusuke Shiono
article en
2 citations

Abstract

BiFeO<sub>3</sub> is the most intensively investigated multiferroic material. It has a cycloidal spin modulation superimposed on G-type antiferromagnetic ordering of Fe<sup>3+</sup> (<i>S</i> = 5/2), which prohibits the appearance of a net magnetization. We found that the simultaneous substitution of Ru<sup>4+</sup> or Ir<sup>4+</sup> for Fe<sup>3+</sup> and Ca<sup>2+</sup> for Bi<sup>3+</sup> suppressed the cycloidal modulation and induced canted weak ferromagnetism at room temperature, while preserving the polar rhombohedral crystal structure. Moreover, the A- and B-site substitutions substantially lowered the ferroelectric transition temperature and resulted in a 1.77% volumetric negative thermal expansion around room temperature. These findings open an avenue for designing new BiFeO<sub>3</sub>-based functional materials.

Journal of the American Chemical SocietyVol. 147(49)
Tokyo Institute of Technology (JP), Nagoya Institute of Technology (JP), Kyoto University (JP), Shanghai Institute for Science of Science (CN), Japan Synchrotron Radiation Research Institute (JP), Sumitomo Chemical (United Kingdom) (GB), Kanagawa Industrial Technology Center (JP), Autonomous Undersea Systems Institute (US), Sumitomo Electric Industries (Japan) (JP), Institute of Science Tokyo (JP)
Openalex Percentile: Top 21%
Thermal Expansion and Ionic Conductivity
1.04
DOISourceOpenAlex
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