Joint Study on Magnetism in Highly Correlated Systems

与荷兰、法国和美国的研究小组合作，在20mK到300K的温度范围内研究了重费米子中的磁性。我们合作进行了许多不同类型的实验，包括比热、电阻率、热膨胀、磁化率、磁化强度、中子衍射和磁化率。0.3)和4d和4f带的嵌套。(B)伴随费米面各向异性带隙开放和重费米子共存的SDW。(C)磁体积效应：因瓦效应和反因瓦效应。(D)用muSR研究磁有序和通过有序出现磁矩。(3)磁量子相变。(4)磁相变与四极有序耦合。

Magnetism in heavy fermions has been studied in the temperature range between 20mK and 300K,collaborating with the groups in the Netherlands, France and the united states. Many different types of experiments have been carried out with collaboration, which are specific heat, resistivity, thermal expansion, susceptibility, magnetization, neutron diffraction and muSR.The research has been performed on next topics ;(1) The relation between crystalline field splitting scheme of 5f-electrons of uranium atom and the resultant magnetism.(2) The study of spin density wave (SDW).(a) SDW in heavy fermion in Ce (Ru_<1-x>Rh_x)_2Si_2 (0.05<x<0.3) and nesting of the 4d and 4f bands.(b) SDW accompanied by anisotropic gap opening in the Fermi surfaces and coexistence of heavy fermion.(c) Magnetovolume effect : INVAR and Anti-INVAR effects.(d) The study by muSR on magnetic ordering and the appearance of magnetic moment by the ordering.(3) Magnetic quantum phase transition.(4) Magnetic phase transition coupled with quadrupolar ordering.