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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


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.

Original languageEnglish
Title of host publicationTheory and Applications of Ferroelectric and Multiferroic Materials
Number of pages6
Publication statusPublished - 2008
Event2008 MRS Fall Meeting - Boston, MA, United States
Duration: 2008 Dec 22008 Dec 4

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Conference2008 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA


Dive into the research topics of 'Ferromagnetism and ferroelectricity in BiFeO3/BiCrO3 artificial 1/1 superlattice'. Together they form a unique fingerprint.

Cite this