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Laboratory of Low Temperature Materials Science Exploring and Controlling Low Temperature Properties of Materials
 In this laboratory, we study the quantum phenomena occurring at low temperatures in superconducting and magnetic materials.
The current research interests are the control of superconductivity by modifying the carrier or spin concentration and the understanding of the mixed-state properties in high & low Tc superconductors, and the exploration of the ground states of electrons in cerium-based-compounds and ferromagnetic nano-granular fi lms near absolute zero temperature. Transport and thermodynamic properties of the samples in the form of thin fi lms, multilayer devices and substituted single crystals are investigated in the wide range of temperature and magnetic fi eld.
This laboratory also contributes to the support works at Center for Low Temperature Science, where we supply liquid helium for various research fi elds and teach the low-temperature experimental techniques. Various experimental facilities for low temperature researches are open to the scientists of Tohoku University and cooperative researches are now in progress.
Prof. Norio KOBAYASH Head: Prof.
Takahiko SASAKI

Assoc. Prof.
Tsutomu NOJIMA

Assist. Prof.
Shintaro NAKAMURA

マイクロカンチレバーを用いて測定した、鉄砒素系超伝導体における磁気トルク曲線。これより超伝導状態の磁気異方性が決定されます。

Superconductor - insulator transition observed in a high-
Tc superconductor film, which is caused by electrostatic carrier doping using an electric double layer transistor configuration.

 

約300 mKの温度でファラデー法による直流磁化測定が可能な研究室自作の3He冷凍機。

The hand-made 3He cryostat, which enables us to measure the DC magnetization at temperatures around 300 mK using the Faraday method.