Annealing temperature dependences of ferroelectric and magnetic properties in polycrystalline co-substituted BiFeO3 films

Hiroshi Naganuma, Jun Miura, Mitsumasa Nakajima, Hiromi Shima, Soichiro Okamura, Shintaro Yasui, Hiroshi Funakubo, Ken Nishida, Takashi Iijima, Masaki Azuma, Yasuo Ando, Kenji Kamishima, Koichi Kakizaki, Nobuyuki Hiratsuka

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Multiferroic Co-substituted BiFeO3 films were fabricated by chemical solution deposition method followed by post deposition annealing at various temperatures. The substitution of cobalt of B-sites for iron in BiFeO3 was promoted at relatively high temperatures. The B-site substitution by cobalt promoted increases in saturation magnetization and spontaneous magnetization. By substitution, leakage current density was suppressed in a high-electric-field region, and ferroelectric hysteresis (P-E) loops became measurable even at room temperature. The optimal annealing temperature for the coexistence of a high remanent polarization and a high remanent magnetization was 923 K having a high B-site substitution ratio of cobalt.

Original languageEnglish
Pages (from-to)7574-7578
Number of pages5
JournalJapanese journal of applied physics
Volume47
Issue number9 PART 2
DOIs
Publication statusPublished - 2008 Sep 19

Keywords

  • B-site substitution
  • Cobalt
  • Leakage current
  • Multiferroics
  • Polycrystalline BiFeO films
  • Spontaneous magnetization

ASJC Scopus subject areas

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

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    Naganuma, H., Miura, J., Nakajima, M., Shima, H., Okamura, S., Yasui, S., Funakubo, H., Nishida, K., Iijima, T., Azuma, M., Ando, Y., Kamishima, K., Kakizaki, K., & Hiratsuka, N. (2008). Annealing temperature dependences of ferroelectric and magnetic properties in polycrystalline co-substituted BiFeO3 films. Japanese journal of applied physics, 47(9 PART 2), 7574-7578. https://doi.org/10.1143/JJAP.47.7574