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Uehara Lab
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A lab developing new magnetic and superconducting materials.
AboutAbout the lab
Aiming to synthesize a material that superconducts at room temperature.
The Uehara Lab studies magnetism and superconductivity at low temperatures, and works to develop superconductors and magnetic materials that show useful physical properties.
Its ultimate goal is to synthesize a material that becomes superconducting at room temperature.
Beyond the search for superconductors, the lab also aims to open up new and interesting physical properties, such as colossal magnetoresistance.
The lab also carries out measurements of magnetic, thermal, and electrical conduction properties, as well as theoretical analysis of experimental results.
Key terms
- Ferromagnetic superconductor
- A superconductor in which ferromagnetism and superconductivity coexist. This is considered an odd situation according to the conventional understanding of superconductivity based on BCS theory.
- Antiferromagnetic half-metal
- A material in which the spins of all conduction electrons point in the same direction, while magnetic ions pointing the opposite way are also present, so the total magnetic moment is zero.
- High-pressure synthesis
- A method of synthesizing materials under high pressure. It has yielded several new materials that could not be made at ambient pressure.
ResearchResearch themes
The goal of the Uehara Lab's research is to create new materials that give rise to new physics beyond conventional physics, including the development of room-temperature superconductors. Focusing on magnetism and superconductivity at low temperatures, the lab synthesizes new materials and measures their properties.
*Illustrative imageSearching for superconductivity in layered nickel oxides
The lab focuses on Ln4Ni3O8 (Ln = La, Pr, Nd), which has NiO2 planes with the same structure as the cuprate (copper oxide) high-temperature superconductors, and aims to realize superconductivity in bulk samples. Superconductivity was reported in 2019 in thin films of a related compound, but it has not yet been reported in bulk.
*Illustrative imageSearching for new materials with unusual magnetic properties
Among sulfides in which conduction electrons are strongly coupled to localized spins in the crystal, the lab is looking for field-induced superconductors, ferromagnetic superconductors, antiferromagnetic half-metal superconductors, and more. Using high-pressure synthesis, several new materials that could not be made at ambient pressure have been synthesized.
*Illustrative imageDeveloping ferromagnetic superconductors
The lab aims to clarify the relationship between ferromagnetism and superconductivity in the superconductor MgCNi3 and to develop new superconductors in which both coexist. It has synthesized many samples, for example by reducing the carbon content and substituting Cd or Zn at the Mg site.
MembersFaculty
The Uehara Lab's members consist of faculty, master's and undergraduate students, and research students, and the lab also involves technical assistants and research collaborators.As of 2025
- Associate ProfessorMasatomo Uehara
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: “Superconductors” Ainur physicist / CC BY 4.0 (cropped)
- Searching for superconductivity in layered nickel oxides: “Superconductor” Edosz2010 / CC BY 4.0 (cropped)
- Searching for new materials with unusual magnetic properties: “Magnetic field bar magnet (top)” Maciej J. Mrowinski / CC BY-SA 4.0 (cropped)
- Developing ferromagnetic superconductors: “Crystal structure of niobium dioxide (NbO₂)” ThomasVJ37 / CC BY-SA 4.0 (cropped)
- Related lab (Raebiger Lab): “Coloured-transition-metal-solutions” No machine-readable author provided. Benjah-bmm27 assumed (based on copyright claims). / Public domain (cropped)
- Related lab (Kawamura Lab): “Muscovite structure 100” Kent G. Budge / CC0 (cropped)
- Related lab (Shimazu Lab): “Josephson junction real” No machine-readable author provided. Pasquale.Carelli assumed (based on copyright claims). / Public domain (cropped)
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