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Environmental Semiconductors and Magnetic Materials Lab
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A lab that creates new devices from semiconductors and magnetic materials made of abundant elements.
AboutAbout the lab
New functional devices from abundant elements.
The Environmental Semiconductors and Magnetic Materials Lab aims to create devices with new functions from semiconductors and magnetic materials made of abundant elements.
For semiconductors, the lab works with BaSi2 and Group 14 semiconductors made of carbon, silicon, germanium, and tin; for magnetic materials, it works with Fe4N, Co4N, and Mn4N.
Its research covers a wide range, from crystal growth (making the materials) and property evaluation to device design, fabrication, and evaluation, as well as first-principles calculations.
The lab is distinctive for its well-equipped facilities for making semiconductor thin films and for handling both semiconductors and magnetic materials in the same lab.
Key terms
- BaSi2
- A semiconductor made of a compound of an alkaline earth metal and silicon, composed of abundant elements
- Crystal growth
- Making a crystal by arranging atoms in an orderly way. It corresponds to the process of making semiconductor thin films
- First-principles calculation
- A method of calculating the properties of a material from the fundamental laws governing atoms and electrons
NewsLab news
A doctoral student received an Outstanding Poster Award at the 23rd Annual Meeting of the Thermoelectrics Society of Japan
A doctoral student's paper was selected for the cover of Journal of Materials Chemistry A
A master's student received the Hiroshi Harashima Academic Encouragement Award
A doctoral student received the President's Award
A doctoral student received the 41st Telecommunications Advancement Foundation Award, Telecom System Technology Student Award
ResearchResearch themes
Some semiconductors and magnetic materials made of abundant elements show highly interesting properties. Using such materials, the lab aims to fabricate devices that exhibit new functions not previously realized, and carries out its research in collaboration with other research institutions.
*Illustrative imageBaSi2 thin-film crystalline solar cells
The lab studies thin-film crystalline solar cells made of BaSi2. It has focused on producing high-quality BaSi2 films, and is now working on building a mechanism inside the device that separates the electrons and holes generated by light.
*Illustrative imageSemiconductor thin films on glass and plastic
The lab forms thin films of Group 14 semiconductors with high carrier mobility on amorphous substrates such as glass and plastic, and fabricates transistors and thermoelectric devices from them.
*Illustrative imageMagnetic nanowires and spin injection sources
The lab works on magnetic nanowire devices and spin injection sources using the magnetic materials Fe4N, Co4N, and Mn4N.
MembersFaculty
The members of the Environmental Semiconductors and Magnetic Materials Lab consist of faculty, doctoral, master's, and undergraduate students, and administrative assistants.As of 2026
- ProfessorTakashi Suemasu
- ProfessorKaoru Toko
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Molecular-beam epitaxy system at LAAS 0516” Guillaume Paumier (user:guillom) / CC BY-SA 3.0 (cropped)
- BaSi2 thin-film crystalline solar cells: “Hexagon solar cells” Wikideas1 / CC0 (cropped)
- Semiconductor thin films on glass and plastic: “Semiconductor Wafer of Microelectronics” DrHughManning / CC BY-SA 4.0 (cropped)
- Magnetic nanowires and spin injection sources: “Nanowire bundles of magnetic MnSi ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Related lab (スピントロニクス研究室): “Molecular-beam epitaxy system at LAAS 0509” Guillaume Paumier (user:guillom) / CC BY-SA 3.0 (cropped)
- Related lab (半導体材料): “4 inch float zone n-type silicon wafer with amorphous silicon thin film heterojunction structure” Radiotrefoil / CC BY-SA 4.0 (cropped)
- Related lab (電子スピン共鳴分光): “Electron spin resonance spectroscopy” Bill Branson (Photographer) / Public domain (cropped)
- Related lab (ナノ物質科学研究室): “B-Crystalline-Amorphous” http://images-of-elements.com/ / CC BY 3.0 (cropped)
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