Ferromagnetism and ferroelectricity in BiFeO3/BiCrO3 artificial 1/1 superlattice

Noriya Ichikawa, Yusuke Imai, Kei Hagiwara, Hiroshi Sakama, Masaki Azuma, Yuichi Shimakawa, Mikio Takano, Yasutoshi Kotaka, Masashi Yonetani, Hironori Fujisawa, Masaru Shimizu, Ken Ya Ishikawa, Yasuo Cho

研究成果: Conference contribution

抄録

We fabricated BiFeO3/BiCrO3 (111) artificial superlattice in a layer-by-layer growth mode by using pulsed laser deposition. The stacking period was chosen to be 1/1 so that Fe3+ and Cr 3+ are ordered in a rock-salt fashion in a perovskite structure. To prepare well-defined interfaces we started from obtaining an atomically-flat surface of SrTiO3 (111) substrate, and restricted the growth mode to only layer-by-layer growth by in situ observation of RHEED intensity during all through the superlattice fabrication. Magnetization measurements at 300 K showed ferromagnetic hysteresis with the magnetic moment per transition metal ion was 1.7μB. This behavior was considered to be resulted from the Fe-O-Cr bonds, realized by the (111) orientation and 1/1 layer-by-layer growth, giving rise to ferromagnetic correlation, although the comprising BiFeO3 and BiCrO3 are both antiferromagnets. Ferroelectric behavior at room temperature was observed by scanning non-linear dielectric microscope. These results indicate that BiFeO3/BiCrO3 (111) 1/1 artificial superlattice is a multiferroic material at room temperature.

本文言語English
ホスト出版物のタイトルTheory and Applications of Ferroelectric and Multiferroic Materials
ページ24-29
ページ数6
出版ステータスPublished - 2008 12 1
イベント2008 MRS Fall Meeting - Boston, MA, United States
継続期間: 2008 12 22008 12 5

出版物シリーズ

名前Materials Research Society Symposium Proceedings
1110
ISSN(印刷版)0272-9172

Other

Other2008 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period08/12/208/12/5

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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