Multiferroic nanocomposite fabrication via liquid phase using anodic alumina template

Go Kawamura; Kazuhiro Ohara; Wai Kian Tan; Taichi Goto; Yuichi Nakamura; Mitsuteru Inoue; Hiroyuki Muto; Kazuhiro Yamaguchi; Aldo R Boccaccini; Atsunori Matsuda

doi:10.1080/14686996.2018.1493888

Multiferroic nanocomposite fabrication via liquid phase using anodic alumina template

Sci Technol Adv Mater. 2018 Jul 24;19(1):535-542. doi: 10.1080/14686996.2018.1493888. eCollection 2018.

Authors

Affiliations

¹ Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi, Japan.
² Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen, Germany.
³ Institute of Liberal Arts and Science, Toyohashi University of Technology, Toyohashi, Aichi, Japan.
⁴ JST, PRESTO, Kawaguchi, Saitama, Japan.
⁵ Electrical and Electronic Engineering Course, National Institute of Technology, Ibaraki College, Hitachinaka, Japan.

Abstract

We report a novel and inexpensive fabrication process of multiferroic nanocomposite via liquid phase using an anodic alumina template. The sol-gel spin-coating technique was used to coat the template with ferrimagnetic CoFe₂O₄. By dissolving the template with NaOH aqueous solution, a unique nanotube array structure of CoFe₂O₄ was obtained. The CoFe₂O₄ nanotube arrays were filled with, and sandwiched in, ferroelectric BaTiO₃ layers by a sol-gel spin-coating method to obtain the composite. Its multiferroicity was confirmed by measuring the magnetic and dielectric hysteresis loops.

Keywords: 102 Porous / Nanoporous / Nanostructured materials; 301 Chemical syntheses / processing; 40 Optical, magnetic and electronic device materials; BaTiO3; CoFe2O4; Sol-gel; multiferroicity; nanotube arrays; templating.

Grants and funding

This work was supported by the Program for Advancing Strategic International Networks to Accelerate the Circulation of Talented Researchers (R2802), JSPS. TG, YN, and MI acknowledge JSPS KAKENHI [Grant Nos. 17K19029, 16H04329, and 26220902]. TG acknowledges JST PRESTO [Grant No. JPMJPR1524].