多重極限下における電気抵抗測定による強相関電子系反強磁性体の研究

概要

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The results of electrical resistivity measurements at low temperatures (2K.LEQ.T.LEQ.300K), high pressures (0.LEQ.P.LEQ.2GPa) and high magnetic fields (0.LEQ.B.LEQ.7T) are reported on two strongly correlated electron antiferromagnets; local-moment type antiferromagnet UPd2Si2 and itinerant antiferromagnet Ce(Ru0.85Rh0.15)2Si2. The obtained temperature-pressure phase diagram of UPd2 Si2 is explained by the axial-next-nearest-neighbor Ising(ANNNI) model. A strong dependence on pressure for the antiferromagnetic state of Ce(Ru0.85Rh0.15)2Si2 is consistent with the transition in being due to a Fermisurface instability.The results of electrical resistivity measurements at low temperatures (2K.LEQ.T.LEQ.300K), high pressures (0.LEQ.P.LEQ.2GPa) and high magnetic fields (0.LEQ.B.LEQ.7T) are reported on two strongly correlated electron antiferromagnets; local-moment type antiferromagnet UPd2Si2 and itinerant antiferromagnet Ce(Ru0.85Rh0.15)2Si2. The obtained temperature-pressure phase diagram of UPd2 Si2 is explained by the axial-next-nearest-neighbor Ising(ANNNI) model. A strong dependence on pressure for the antiferromagnetic state of Ce(Ru0.85Rh0.15)2Si2 is consistent with the transition in being due to a Fermisurface instability.
室蘭工業大学の論文
1999-11-30