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Title: Large magnetoelectric coupling in magnetically short-range ordered Bi5Ti3FeO15 film
Authors: Zhao, HY
Kimura, H
Cheng, ZX
Osada, M
Wang, JL
Wang, XL
Dou, SX
Liu, Y
Yu, JD
Matsumoto, T
Tohei, T
Shibata, N
Ikuhara, Y
Keywords: Magnetism
Electric fields
Ferroelectric materials
Electron microscopy
Thin films
Curie point
Issue Date: 11-Jun-2014
Publisher: Nature Research
Citation: Zhao, H., Kimura, H., Cheng, Z., Osada, M., Wang, J., Wang, X., Dou, S. X., Lui, Y., Yu, J., Matsumoto, T., Tohei, T., Shibata, N., & Ikuhara, Y. (2014). Large magnetoelectric coupling in magnetically short-range ordered Bi5Ti3FeO15 film. Scientific Reports, 4. doi:
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. © 2020 Springer Nature Limited
Gov't Doc #: 7742
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