Pressure-Induced Instability of Magnetic Order in Kondo-Lattice System : Neutron Diffraction Study of the Pseudo-Binary Alloy System Ce(Ru_<0.90>Rh_<0.10>)_2(Si_<1-y>Ge_y)_2 (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Propert

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Neutron diffraction experiments have been carried out to study the nature of the magnetic order of the pseudo-binary alloy system Ce(Ru_<0.90>Rh_<0.10>)_2(Si_<1-y>Ge_y)_2. Response of the ordered atomic magnetic moment, μ, the transition temperature, T_N, and the magnitude of the magnetic modulation vector, q, to the chemical pressure and also to the applied hydrostatic pressure, P, were examined at low temperatures. When y changes, all of μ, T_N and q show a sudden alteration of the manner of the y-dependence at around y〜0.08. The P-dependence of q shows quite different features for different y's of 0.0, 0.2 and 0.25. On the basis of these observations the possibility of a pressure-induced alternation of the magnetic regime of the order is discussed.
社団法人日本物理学会の論文
2003-07-15