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- Title
Large magnetoelectric coupling in magnetically short-range ordered Bi<sub>5</sub>Ti<sub>3</sub>FeO<sub>15</sub> film.
- Authors
Hongyang Zhao; Kimura, Hideo; Zhenxiang Cheng; Osada, Minoru; Jianli Wang; Xiaolin Wang; Shixue Dou; Yan Liu; Jianding Yu; Matsumoto, Takao; Tohei, Tetsuya; Shibata, Naoya; Ikuhara, Yuichi
- Abstract
Multiferroic materials, which offer the possibility of manipulating the magnetic state by an electric field or vice versa, are of great current interest. However, single-phase materials with such cross-coupling properties at room temperature exist rarely in nature; new design of nano-engineered thin films with a strong magneto-electric coupling is a fundamental challenge. Here we demonstrate a robust room-temperature magneto-electric coupling in a bismuth-layer-structured ferroelectric Bi5Ti3FeO15 with high ferroelectric Curie temperature of ∼1000 K. Bi5Ti3FeO15 thin films grown by pulsed laser deposition are single-phase layered perovskit with nearly (00l)-orientation. Room-temperature multiferroic behavior is demonstrated by a large modulation in magneto-polarization and magneto-dielectric responses. Local structural characterizations by transmission electron microscopy and Mössbauer spectroscopy reveal the existence of Fe-rich nanodomains, which cause a short-range magnetic ordering at∼620 K. In Bi5Ti3FeO15 with a stable ferroelectric order, the spin canting of magnetic-ion-based nanodomains via the Dzyaloshinskii-Moriya interaction might yield a robust magneto-electric coupling of ∼400 mV/Oe·cm even at room temperature.
- Subjects
MAGNETIC coupling; MAGNETOELECTRIC effect; FERROELECTRIC thin films; SOLID state electronics; SURFACE coatings; CURIE temperature
- Publication
Scientific Reports, 2014, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep05255