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Fujiwara Lab
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A lab that applies pressures of tens of thousands of atmospheres to explore the magnetic properties of superconductors.
AboutAbout the lab
Approaching the mechanism of superconductivity under high pressure.
The Fujiwara Lab studies the magnetic properties of superconductors from a microscopic perspective, using nuclear magnetic resonance (NMR) under high pressure.
The lab works both on developing equipment for measurements under pressure and on studying materials such as iron-based high-temperature superconductors.
Undergraduates are assigned to the Materials Science Division to carry out their graduation research (in the graduate school, this is the Materials Science Division of the Department of Human and Environmental Studies, Graduate School of Human and Environmental Studies).
Key terms
- Nuclear magnetic resonance (NMR)
- A method that uses the tiny magnet-like property of atomic nuclei to investigate the electrons and magnetism inside a material. Also called NMR
- Spin fluctuations
- A state in which the directions of the tiny magnets (spins) of electrons do not fully align and keep fluctuating
ResearchResearch themes
Using NMR under high pressure, the lab studies the magnetic properties of strongly correlated electron systems, especially superconductors.
*Illustrative imageDevelopment of NMR equipment for high-pressure experiments
With a piston-cylinder pressure cell, NMR measurements are possible at about 40,000 atmospheres. In 2020, using a compact cubic anvil pressure cell, the lab succeeded in measuring nuclear quadrupole resonance at about 70,000 atmospheres.
*Illustrative imageSpin fluctuations in iron-based high-temperature superconductors
In the iron-selenide superconductor FeSe1-xSx, the lab observed spin fluctuations originating from the Fermi surface that appear only in the superconducting state, and is also investigating how they change with pressure.
MembersFaculty
- ProfessorNaoki Fujiwara
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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: “Diamond Anvil Cell - Cross Section-tr” Original work: Tobias1984, Translation: VectorVoyager / CC BY-SA 3.0 (cropped)
- Development of NMR equipment for high-pressure experiments: “Nuclear magnetic resonance devices in CAFIA laboratory” Sarka Na kopci / CC BY-SA 4.0 (cropped)
- Spin fluctuations in iron-based high-temperature superconductors: “Levitating superconductor” Julian Litzel (Jullit31) / CC BY-SA 3.0 (cropped)
- Related lab (Yoshida Lab (Teppei Yoshida)): “European Synchrotron Radiation Facility (ESRF) - Grenoble, France” Anders Sandberg from Oxford, UK / CC BY 2.0 (cropped)
- Related lab (Morinari Condensed Matter Theory Lab): “Tile levitates by Meissner effect” Garrett Pennell / CC BY-SA 3.0 (cropped)
- Related lab (Adachi Lab): “Interference of Waves” Psgs123xyz / Public domain (cropped)
- Related lab (Fujita Lab): “Iridium element” W. Oelen / CC BY-SA 3.0 (cropped)
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