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Tokunaga Lab
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Tokunaga Lab is a high-magnetic-field physics lab that uses pulsed high magnetic fields to explore new quantum states in materials.
AboutAbout the lab
Searching for new quantum states in strong magnetic fields
Tokunaga Lab studies the properties of materials using pulsed high magnetic fields of up to 60 tesla.
Because a magnetic field acts directly on the spin and orbital motion of electrons, the lab explores new quantum states that emerge in strong magnetic fields, as well as phenomena induced by the field.
To grasp the essence of these phenomena, the lab develops measurement techniques that capture changes in magnetism, electrical conduction, and other properties instantaneously as they occur in a pulsed magnetic field.
The lab investigates materials such as multiferroic materials and topological semimetals, and carries out many collaborations with researchers in Japan and abroad.
Key terms
- Pulsed high magnetic field
- An extremely strong magnetic field created for only a brief moment by passing a large electric current for a short time
- Multiferroic material
- A material that has both magnetic properties and the property of electric polarization (dielectric behavior). In some of these materials, a magnetic field changes the electrical properties
- Topological semimetal
- A semimetal whose electronic states are characterized by properties of topology, a branch of mathematics that deals with shape
NewsLab news
Results of joint research with Tohoku University and others published in the Journal of the American Chemical Society
Paper on a Kondo insulator, from joint research with Tokyo University of Science and others, published in Physical Review B
Results of joint research with the Japan Atomic Energy Agency and others published in Physical Review Letters
ResearchResearch themes
Using pulsed high magnetic fields of up to 60 tesla, the lab explores new quantum states that emerge in strong magnetic fields and phenomena induced by the field. To understand the essence of these phenomena, the lab also works on developing methods to measure a wide variety of physical quantities with high precision.
*Illustrative imagePrecision measurements in pulsed high magnetic fields
The lab develops and improves measurement techniques that instantaneously detect changes in magnetism, electrical conductivity, dielectric properties, structure, symmetry, temperature, and more as they occur in a pulsed magnetic field. Using these techniques, the lab studies the cross-correlated properties of multiferroic materials and the magnetotransport properties of topological semimetals.
*Illustrative imageHigh-field physics through collaborative research
Through many collaborations with researchers in Japan and abroad, the lab investigates the properties in strong magnetic fields of a wide range of materials, including itinerant and localized spin systems and topological materials.
MembersFaculty
- ProfessorMasashi TokunagaPublications ↗
- Assistant ProfessorMasaki KondoPublications ↗
- Assistant ProfessorHiroyuki MitamuraPublications ↗
- Project Assistant Professor木下 雄斗
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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: “Jet Propulsion Laboratory 100 Kilogauss Magnet kmagnet-600” NASA / Public domain (cropped)
- Precision measurements in pulsed high magnetic fields: “Current carrying busbars at the LNCMI” Nerd bzh / CC BY-SA 3.0 (cropped)
- High-field physics through collaborative research: “Bismuth crystal macro” Dschwen / CC BY 2.5 (cropped)
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