Low-Temperature Magnetization Study on the Phase IV Ordering in Ce_xLa_<1-x>B_6 under [111] Uniaxial Pressures(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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We have examined the magnetization M of Ce_xLa_<1-x>B_6 (x = 0.75 and 0.7) under uniaxial pressures P (≤ 100MPa) applied along the [111] direction, focusing our attention on the enigmatic phase IV ordering where the magnetization is nearly isotropic at an ambient pressure. Under the pressure which stabilizes the phase IV ordering, a cusp is observed upon the phase IV ordering for all directions and a distinct anisotropy is found to develop in the phase IV region as M_<11^^-1> > M_<100> > M_<111>. These results, combined with the results of a previous uniaxial pressure experiment with P ‖ [110], support the recently proposed Γ_5-type octupolar ordering model.
社団法人日本物理学会の論文
2004-09-15