Waseda University · 재료과학
N. Takeda 교수의 연구실은 첨단 희토류 및 전이금속 화합물의 초전도성과 강한 전자 상호작용을 중심으로 연구를 진행하고 있습니다. 특히, 중간가환성 이(tf) 및 비페르미 액체 거동을 보이는 체계에서의 전자상 전이와 Kondo 효과를 규명하며, 양자물리적 현상의 기초를 탐구합니다. 또한, 기계적 자극에 반응하는 광학적 특성을 가진 신소재인 메커노플루오레센스 고분자도 개발하여 응용 분야로의 확장을 모색하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
We have studied superconducting and magnetic properties of RERu 4 Sb 12 prepared by an Sb-flux method and found that LaRu 4 Sb 12 is superconducting below 3.58 K and PrRu 4 Sb 12 is a Van Vleck paramagnet which becomes superconducting below 1.04 K. CeRu 4 Sb 12 is a unique substance which shows intermediate-valence behavior with a characteristic broad peak around 100 K in the magnetic susceptibility and Kondo-like behavior in the electrical resistivity at high temperatures. Furthermore, non-Ferm
Magnetic and transport properties of the ternary compound Ce 3 Pd 20 Si 6 are investigated down to 0.035 K. The temperature dependence of the electrical resistivity indicates that this compound is a new Kondo material. The low-temperature specific heat measurement reveals that C / T is strongly enhanced at low temperatures, reaching as high as 8 J/mole Ce · K 2 at 0.2 K. This leads to the conclusion that Ce 3 Pd 20 Si 6 is one of the heaviest-electron systems.
Supramolecular mechanofluorophores based on charge-transfer (CT) interactions between fluorescent pyrene and naphthalene diimide(s) with a tandem structure are newly developed and incorporated into the mid-chain of poly(ε-caprolactone)s. The fluorescence (FL) is quenched by the intramolecular CT interactions even at low concentrations both in solution and in the polymer matrix, and turn-on FL is induced upon application of mechanical forces.
