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Sekiguchi Lab (Spintronics Lab)
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A lab exploring energy-efficient information processing using spin waves.
AboutAbout the lab
Taking on energy-efficient information processing with spin waves
The Sekiguchi Lab aims to explore the fundamental science of magnetic materials and to conduct foundational research on energy-saving technologies that use them.
Spintronics is a research field whose foundations span semiconductor engineering, magnetics engineering, and optics.
The lab studies transistors that use spin waves propagating through magnetic materials, brain-inspired functional devices, and more.
Key terms
- Spin wave
- A wave phenomenon that propagates through a magnetic material. Treated quantum mechanically, it is thought of as particles (magnons) propagating.
- Edge computing
- A method in which information is processed autonomously on terminal devices or at their edge, rather than being aggregated on servers.
- Bose-Einstein condensation
- One of the quantum many-body effects, in which bosons form a macroscopic condensate.
ResearchResearch themes
While exploring fundamental science such as quantum many-body phenomena and nonlinear phenomena in magnetic materials, the lab aims to conduct foundational research on energy-saving technologies for next-generation information processing devices. Based on semiconductor microfabrication technology, it aims to develop computing elements from a variety of materials, develop circuits, and work on memory control.
*Illustrative imageSpintronics and magnonics
In spintronics, which aims to improve the performance of existing electronic devices, the lab studies spin current control in semiconductor silicon and MRAM, a non-volatile memory. In magnonics, which aims to control spin waves freely, it investigates topics such as spin wave transmission.
*Illustrative imageNeurocomputing
Edge computing, in which information is processed autonomously at the edge of terminal devices, is in demand. Spin waves in magnetic materials have short-term memory and nonlinear effects, and are thought to be applicable to physical reservoir computing.
*Illustrative imageMagnon transistors
Conventional transistors have advanced with electrons as carriers, but rising integration density and operating frequency have increased their energy consumption. Magnons in magnetic materials may serve as a new type of carrier that does not cause Joule heating, and the lab studies low-power transistors that use them.
*Illustrative imageMagnon quantum condensation
Magnons are bosons, and it has been pointed out that they can form a macroscopic condensate like a Bose-Einstein condensate. This may occur at room temperature, not only at extremely low temperatures, and the lab studies the still-unexplained accompanying phenomena using a BLS (Brillouin light scattering) spectroscopy system that measures the number of magnons.
MembersFaculty
The members of the Sekiguchi Lab are faculty, master's students, and undergraduate students.As of 2026
- ProfessorKoji Sekiguchi
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: “Scanning tunneling microscope; Semiconductor; Spintronics ( )” National Institute of Standards and Technology / Public domain (cropped)
- Spintronics and magnonics: “Molecular Spintronic Action Confirmed in Nanostructure ( )” National Institute of Standards and Technology / Public domain (cropped)
- Neurocomputing: “DARPA SyNAPSE 16 Chip Board” DARPA SyNAPSE / Public domain (cropped)
- Magnon transistors: “Active region of the thin-film splitted Hall structure of a 3D magnetic sensor” TetyanaMarusenkova / CC BY-SA 3.0 (cropped)
- Magnon quantum condensation: “Bose-Einstein Condensate ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (Nishiguchi Lab): “Quantum dots demonstration set” Physicsexperimentsorg / CC BY-SA 4.0 (cropped)
- Related lab (Oya Lab (Integrated Nanodevices Lab)): “Belousov-Zhabotinsky reaction” Wiktor (Uncle Azane) / CC BY-SA 3.0 (cropped)
- Related lab (Arakawa Lab (Semiconductor Photonics Engineering Lab)): “Laser diode with case cut away” Arconsoli / CC BY-SA 4.0 (cropped)
- Related lab (Yamanashi Lab (Superconducting Quantum Integrated Electronics Lab)): “Noiseless Amplifier ( )” National Institute of Standards and Technology / Public domain (cropped)
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