Fukumura group | Tohoku university

Welcome to the Fukumura Research Group!

This website is the homepage of Inorganic Solid State Chemistry Laboratory in Tohoku University.

Our group's aim is to construct scientific foundation to discover, create, understand and develop novel functionalities in various solid materials, such as oxides, by means of nano- to macro-scale state-of-the-art experimental techniques.

We are looking for graduate students, both inside and outside of the university!

If you are interested in our laboratory, please feel free to contact Prof. Fukumura.

10.11.2024 - Update in People.
08.01.2024 - Update in Album.
06.08.2024 - Update in People, Presentations, and Album.
05.10.2024 - A new publication by Takato Fukasawa in Journal of Materials Chemistry C. GdO shows room temperature ferromagnetism. The publication / List of papers
05.08.2024 - A new publication by Kenshin Yoshikawa in CrystEngComm. LaBi thin film grown from multilayer precursor shows a large magnetoresistance. The publication / List of papers
04.03.2024 - Update in Presentations.
04.03.2024 - Update in People.
01.09.2024 - Update in People.
12.04.2023 - A new publication by Yuki Yamamoto in ACS Applied Nano Materials. "Multilayer Solid-Phase Epitaxy of La₂O₂Bi Thin Film toward Higher Electrical Conduction in Monoatomic Bi Square Net Semimetal" /List of papers
11.01.2023 - Update in People.
10.19.2023 - A new publication by Daichi Saito in Journal of Materials Chemistry C. "Thickness-dependent magnetotransport properties of rocksalt NdO epitaxial thin films: observation of a ferromagnetic phase far above the Curie temperature" /List of papers
10.10.2023 - Update in People.

News archive

Superb functionalities beyond our imagination are often hidden in newly synthesized compounds. Our group aims to develop methodology to understand the laws of nature by synthesizing new inorganic/organic solids and by exploring novel physical/chemical properties. To this end, we design compounds with novel functionalities based on solid state physics and chemistry, develop new synthetic routes, and conduct measurements using state-of-the-art techniques. Such basic research solidifies scientific foundation to trigger next generation innovations.

RESEARCH HIGHLIGHT

Electric-Field-Induced Ferromagnetism

Co-doped TiO2 is a ferromagnetic semiconductor. Because this material possesses quite high Currie temperature (~600 K) unlike the other ferromagnetic semiconductors, the mechanism of the ferromagnetism has long been argued. In this study, the room-temperature ferromagnet is induced by electric field in an electric double layer transistor device. Lightly Co-doped specimen shows paramagnetism in case of low carrier density. By applying large electric field to accumulate electron carriers in the device, the electron carriers induce ferromagnetism. This result clearly demonstrates that the ferromagnetism in Co-doped TiO2 is caused by the carrier mediated exchange interaction.