| Budget Amount *help |
¥24,050,000 (Direct Cost: ¥18,500,000、Indirect Cost: ¥5,550,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Fiscal Year 2014: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
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| Outline of Final Research Achievements |
In the present work, I have focussed on the multipole-driven phenomena in non-Kramers systems PrT2Zn20 (T=Ir, Rh) including the trivalent Pr ion with 4f2 configuration. By means of neutron diffraction experiments in magnetic fields, the order parameter of the quadrupole order in PrIr2Zn20 was determined. La substitution effect on the transition temperatures for the quadrupole order and the superconductivity in PrIr2Zn20 is hardly related. The non-Fermi liquid behaviors of the electrical resistivity and the specific heat can be reproduced by the 2ch Anderson lattice model, suggesting formation of quadrupole Kondo lattice. In magnetic fields at around 5 T applied along the [100] direction, a new type of a Fermi-liquid ground state manifests itself. Moreover, systematic understanding of the quadrupole order, superconductivity, and structural transition in PrT2Zn20 (T=Ir, Rh) and PrT2Al20 (T=Ti, V) were presented.
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