| Project/Area Number |
07044087
|
|---|
| Research Category |
Grant-in-Aid for international Scientific Research
|
| Allocation Type | Single-year Grants |
|---|
| Section | Joint Research |
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
MIYAKO Yoshihito Graduate School of Science, Osaka University, Professor, 大学院・理学研究所, 教授 (10000837)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MORIN P Center National de la Recherche Scientifique Labotatoire Louis Neel・Director Ass, ネール研究所, 研究部長 教授
PHILLIPS N.E Berkeley, University of California, Professor, バークレー分校, 教授
MYDOSH J.A Kamerlingh Onnes Laboratory, Leiden University, Professor, カメリンオネス研究所, 教授
ISHIKAWA Masayasu The Institute of Solid Physics, Tokyo University, Professor, 物性研究所, 教授 (70159705)
ONUKI Yoshichika Graduate School of Science, Osaka University, Professor, 大学院・理学研究所, 教授 (40118659)
|
|---|
| Project Period (FY) |
1995 – 1996
|
| Keywords | Heavy fermion / Kondo effect / SDW / Quadrupolar order / INVAR / Specific heat / Resistivity / Neutron Scattering |
|---|
| Research Abstract |
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.
|
